Journal of
Plant Breeding and Crop Science

  • Abbreviation: J. Plant Breed. Crop Sci.
  • Language: English
  • ISSN: 2006-9758
  • DOI: 10.5897/JPBCS
  • Start Year: 2009

JPBCS Articles

August 2018

Potential in a collection of adapted and exotic tropical maize inbred lines as resistance source for stem borers

Lepidopteran borers are the most devastating field pests of maize in West and Central Africa. In view of the rapidly changing climate which favours an upsurge of more destructive biotypes of insect pests, diverse sources of resistance from different genetic backgrounds need to be harnessed for crop improvement purposes. Forty tropical maize inbreds comprising adapted and exotic lines from International Institute of...

Author(s): Qudrah Olaitan Oloyede-Kamiyo, Sam Oyewole Ajala and Anthony Oluwatoyosi Job  

August 2018

Agro-morphological characterization of some taro (Colocasia esculenta (L.) Schott.) germplasms in Ghana

Taro (Colocasia esculenta (L) Schott.) is one of the underutilized crops in Ghana which has great potential in terms of food and nutritional value. Eighteen (18) accessions collected from Samoa (8), Malaysia (2), Indonesia (2) and Ghana (6) were studied under field conditions to collect data on their agro-morphological characteristics and yield potential for the development of the crop. The study was conducted at...

Author(s): R. Boampong, L. M. Aboagye, D. Nyadanu and M. Esilfie  

August 2018

Varietal screening for resistance against field and storage crop pests: An implication for Ethiopian crop variety development

Food security in developing countries like Ethiopia has been a challenge for many years due to pre and post-harvest losses of agricultural products which are caused by different biotic and abiotic factors.  Grain losses from pest infestation prior to harvest and during storage are a serious problem, particularly in developing countries like Ethiopia. More than 70% insect pests have been identified; they attack...

Author(s): Muez Berhe Gebremdein  

August 2018

Evaluation of constraints in production of root and tuber crops in Ethiopia: Overview of policy neglected climate resilient food security crops

The objective of the current study was to examine the major constraints in production of root and tuber crops in Ethiopia with emphasis on identifying the policy gaps. This appraisal was based on survey report of Central Statistical Agency (CSA) for the period of 2011 to 2015. Data of CSA report was chosen for the current study with the view to gain an overview of policy packages in root crops in contrast with other...

Author(s): Semeredin Yimer and Tsegaye  Babege  

July 2018

Genetic variability in a quality protein maize (QPM) population under double viral infections

The type of gene action conferring combined resistance to maize streak virus (MSV) and maize stripe virus (MStV) was investigated in a Quality Protein Maize (QPM) population, ART/98/SW6-OB. Full-sib and half-sib progenies generated using North Carolina Design I mating scheme were evaluated in 2015 and 2016 in two locations endemic to the viral diseases in Nigeria. Serological study was also conducted on the progenies to...

Author(s): Qudrah Olaitan Oloyede-Kamiyo, Kehinde Titilope Kareem and Amos Oluwaseun Ajagbe

July 2018

Incidence of seed borne fungi in farm saved rice seeds, quality declared seed and certified seed in Morogoro Region in Tanzania

Rice (Oryza sativa L.) is the second most important food crop after maize in Tanzania. It faces many challenges like diseases, pests and physical damages, which reduce the seed quality. This article identified microorganisms and the district where they occurred. 13 fungal species comprising of 11 pathogenic and 2 saprophytic fungi were detected and the incidence level varied among sample. Mvomero District showed the...

Author(s): A. D. Kwaloe, , D. G. Msuya, S. Nchimbi-Msolla, D. P. Tokpah and Z. Luther  

July 2018

Phenotypic and serological evaluation of cowpea (Vigna unguiculata L.Walp) genotypes for resistance to viral infection under field conditions

Viral infections are a major challenge to sustainable cowpea production in sub-Saharan Africa (SSA). Nine cowpea (Vigna unguiculata L. Walp) genotypes were evaluated for resistance against viral infection in a field trial involving randomized complete block design with 4 replications. Viral disease severity was assessed at 2, 4 and 6 weeks after planting (WAP) based on disease symptoms. Double antibody sandwich-enzyme...

Author(s): Elvis Asare-Bediako, Vera Essandoh A. and Aaron Asare T.

July 2018

On farm demonstration of improved lettuce variety (Lactuca Sativa) in Southeastern zone of Tigray, Ethiopia

Improved slow bolting lettuce variety is one of the important traits of lettuce for farmers in the study area to increase their production and income. Therefore a field experiment was conducted in Enderta district of South eastern zone of Tigray with the objective to evaluate and demonstrate the slow bolting lettuce variety, enhance the income of farmers by increasing production and productivity, and participate farmers...

Author(s): Luchia Tekle, Niguse Abebe and Mehari Asfaw

June 2018

Inheritance and combining ability study on drought tolerance and grain yield among early maturing inbred lines of maize (Zea mays L.)

Utilization of stress tolerant maize is key to sustainable production and food security. Limited knowledge on genetics of drought tolerance hampers development of drought tolerant varieties. The aim of this study was to study inheritance and combining ability of drought tolerance and grain yield among early inbred lines of maize. Five inbred lines were mated in full diallel in 2015 major season. The resultant 20...

Author(s): Issa Z. M. M., Nyadanu D., Richard A., Sangare A. R., Adejumobi I. I. and Ibrahim D.

June 2018

Development of two high-yielding, consumer-acceptable apple banana hybrids (Musa species, AAB genome group) with resistance to Fusarium oxysporum f. sp. cubense race 1

Fusarium wilt of bananas (Musa species) is caused by Fusarium oxysporum f. sp. cubense (Foc). Foc race 1 in particular affects dessert bananas in Uganda, causing >60% yield loss. This study was conducted to assess the performance of two new apple banana genotypes for bunch yield, resistance to Foc race 1 and consumer acceptability. The new apple banana genotypes (NAMU1 and NAMU2), along with two check cultivars, one...

Author(s): Henry Buregyeya,, Robooni Tumuhimbise, Jerome Kubiriba, David Talengera, Kephas Nowankunda, Geofrey Arinaitwe, Wilberforce K. Tushemereirwe, Deborah Karamura, Eldad Karamura and Patrick Rubaihayo

June 2018

Effect of heat stress on common bean under natural growing conditions in three locations in different climate zones in the state of São Paulo, Brazil

Common bean (Phaseolus vulgaris L.) originated in medium to high altitude regions and is sensitive to high temperatures. Climate changes from an increase in global temperatures are foreseen, and therefore better understanding of the mechanisms of heat tolerance is necessary. In this context, the aim of this study was to investigate the effects of heat stress on twelve common bean genotypes under natural growing...

Author(s): Daiana Alves da Silva, Raquel Luiza de Moura dos Reis, João Guilherme Ribeiro Gonçalves, Sérgio Augusto Morais Carbonell and Alisson Fernando Chiorato

June 2018

Genetic variation of tef [Eragrostis tef (Zucc.) Trotter] genotypes for reaction to tef shoot fly [Atherigona hyalinipennis Van Emden], at Maysiye, Northern Ethiopia

One of the major biotic stresses that limits tef yield is insect pests attack. Of these tef, shoot fly is sporadically important insect pest in various tef growing areas of Ethiopia. Evaluation of diversity of tef germplasm in Ethiopia for the reaction tef shoot fly might give a chance to get host plant resistance. The main objective of this study was to assess the genetic variation among tef genotypes for their...

Author(s): Chekole Nigus

May 2018

Combining ability assessment in Helianthus annuus L. through line × tester analysis for quantitative traits and quality parameters

The cross combinations of different lines and testers (L×T) for high yielding sunflower (Helianthus annuus) hybrids were evaluated. Plant materials were utilized by L×T mating design of 7 lines and 3 testers and their 21 hybrids were sown in the field during 2015 autumn season in RCBD design with 3 replications. Genetic variability, general combing ability (GCA) and specific combining ability (SCA) among...

Author(s): Muhammad Azeem ur Rahman Khalid, Dr Muhammad Ahsan Iqbal, Muhammad Zubair, Amanullah Zafar, Asad Butt, Sulman Abid, Yasir Shahzad, Muhammad Ajmal and Ali Adnan Liaqat

May 2018

Genetic variability and diversity studies in Durum wheat (Triticum turgidum L. var. durum) genotypes based on cluster analysis using agronomic and quality traits in Southern Ethiopia

Genetic diversity is worthwhile for durum wheat breeding and consequently results in production of more efficient varieties under different conditions. Cluster analysis based on Euclidean distances was carried out with 21 durum wheat genotypes to assess the genetic diversity for agronomic and quality traits. The Unweighted Pair Group Average using Arithmetic Mean as linkage rule was used for the analysis of the...

Author(s): Yonas Shimelis, Wassu Mohammed and Tesfaye Letta

May 2018

Post-harvest evaluation of selected inbred lines to maize weevil Sitophilus zeamais resistance

Maize weevil (Sitophilus zeamais Motschulsky) is a major maize (Zea mays L.) storage insect pest in the tropics which reduces the quantity and quality of maize hence facilitating establishment of aflatoxin and other mycotoxins. The objective of this study was to evaluate maize weevil resistance on selected inbred lines. Twenty eight inbred lines with 2 checks (MTPO701-reistant and Duma 41-susceptible) were used in this...

Author(s): Khakata S., Mbute F. N., Chemining’wa G. N., Mwimali M., Karanja J., Harvey J. and Mwololo J. K.

April 2018

Compatibility studies in Cola nitida genotypes

Cross and self-pollination compatibility studies were carried out using 10 Cola nitida genotypes from the Cocoa Research Institute of Nigeria, Ibadan. The few genotypes that were self-pollinated tended to show low pod production; whereas, crosses between the genotypes showed higher pod production. These data would suggest that multiple genotypes should be included in plantations to achieve higher levels of...

Author(s): Odutayo, O. I., Adeyemi, F. A., Adebola, P. O. and Sotimehim, O. I.

April 2018

Genotypes × Environment interaction analysis for Ethiopian mustard (Brassica carinata L.) genotypes using AMMI model

The genotype x environment interaction (GEI) has an influence on the selection and recommendation of genotypes. To this end, G x E interaction and grain yield stability study was conducted for 17 advanced Ethiopian mustard across three districts (Sinana, Adaba and Agarfa) in the highlands of Bale zone during 2014 and 2015 main cropping season. Randomized complete block design with four replications was used. The...

Author(s): Tadele Tadesse, Gashaw Sefera and Amanuel Tekalign

March 2018

Are nonwoven synthetic pollination bags a better choice for sorghum breeding?

This work investigated the effects of seven pollination bag treatments on three varieties of sorghum for: grain loss to birds; total weight of five panicles (g); total grain weight of five panicles (g); average grain weight per panicle (g); germination per cent; and occurrence of grain mold during 2016. Varieties were: 1167048 hybrid (brown seeded); BR007B (red seeded); and P9401 (white seeded). The bag treatments were:...

Author(s): R. E. Schaffert, D. S. Virk and H. Senior

March 2018

Field assessment of disease resistance status of some newly-developed early and extra-early maize varieties under humid rainforest conditions of Nigeria

Periodic assessment of resistant status of genetic materials in a breeding program is an important activity to ensure its continued progress. Forty newly-developed early and extra-early maize varieties were evaluated under natural field infection conditions for two years to assess their resistance status to some common diseases prevalent in the humid rainforest agro-ecology, and to determine effect of the diseases on...

Author(s): Akinwale R. O. and Oyelakin A. O.

February 2018

Phenological, morphological and agronomic characterization of sixteen genotypes of cotton plant (Gossypium hirsutum L.) in rainfed condition in Benin

In Benin, cotton cultivation is rain fed. There is a need to develop varieties adapted to the current diversity of growing conditions caused by climate disruptions. To identify types of varieties that may be used in crossing to adapt varietal offer to climatic disturbances, sixteen genotypes of diverse origins were characterized with a randomized complete block design with four replications. Fifteen agro-morphological...

Author(s): Emmanuel SEKLOKA, Albert Kora SABI, Valérien Amégnikin ZINSOU, Abib ABOUDOU, Cyrille Kanli NDOGBE, Léonard AFOUDA and Lamine BABA-MOUSSA

February 2018

Production of groups of tomatoes in substrate at different concentrations of phosphorus

The development of production technologies, such as greenhouses, was highlighted in the growth of horticultural crops. However, these products are often offered without basic instructions to farmers who can generate financial losses. One outstanding production technology is substrate cultivation, which would be very useful in the cultivation of protected plants. Like this, in order to evaluate the effects of different...

Author(s): Douglas José Marques, Tales Machado Lacerda, Wellington Ferrari da Silva, Márcio de Souza Dias and Hudson Carvalho Bianchini

February 2018

Screening cotton (Gossypium hirsutum L.) genotypes for drought tolerance under screen house conditions in Malawi

Drought stress is a major factor decreasing cotton productivity in Malawi. To identify drought tolerant cultivars, a study was conducted in 2012 at Bunda College to evaluate the performance of 20 cotton genotypes under water stress conditions. A screen house pot experiment was carried out using a randomized complete block design and data were recorded on tap root length, lateral root number, fresh root weight, dry root...

Author(s): Jessie Mvula, James M. Bokosi, Venon Kabambe and Mackson H. P. Banda

January 2018

Evaluation of crossability studies between selected eggplant accessions with wild relatives S. torvum, S. anguivi and S. aethopicum (Shum group)

Wild relatives of eggplants represent a good source of variation for breeding programmes, in particular for traits related to biotic and abiotic stresses and also fruit quality traits. However, wild species remain largely unexploited for eggplant breeding compared to other crops like tomato. Seven cultivated eggplant accessions (SM001-02, SM001-04, SM001-06, SM001-07, SA002-02, SA002-03 and SMA003-03) were crossed with...

Author(s): Afful N. T., Nyadanu D., Akromah R., Amoatey H. M., Annor C. and Diawouh R. G.

January 2018

Performance of Solanum aethiopicum Shum group accessions under repetitive drought stress

Drought is a serious climatic hazard to crop production, more especially when it occurs repeatedly. This created a need to identify repetitive drought tolerant varieties that recover following exposure to drought. Twenty accessions of Solanum aethiopicum Shum group were evaluated for their response to repeated drought exposure in a screen house at Uganda Christian University stressed and well-watered conditions in a...

Author(s): Mildred Julian Nakanwagi, Godfrey Sseremba, Michael Masanza and Elizabeth  Balyejusa Kizito

January 2018

Inheritance of cowpea resistance to flower thrips in Uganda germplasm

Flower thrips [Megalurothrips sjostedti (Trybom)] is the most damaging insect pest on cowpea. However, information regarding the nature of gene action governing the inheritance of resistance to thrips is not available for cowpea genotypes in Uganda. This study was carried out to determine the inheritance pattern of cowpea resistance to flower thrips. Five resistant cowpea genotypes and three susceptible genotypes were...

Author(s): Symphorien Agbahoungba, Jeninah Karungi, Arfang Badji, Kassim Sadik, Paul Gibson, Richard Edema, Achille E. Assogbadjo and Patrick R. Rubaihayo

December 2017

Assessment of the inheritance pattern of the novel "female only flower" trait in Jatropha curcas L. as potential for hybrid seed production

Jatropha curcas L. (JLC) is a perennial shrub, originating in Central and South America and widely distributed in the tropical regions of the world. It is important in the bioenergy industries due to the characteristics of its oil which can be transformed into high quality biofuel for the substitution of diesel and jet fuel. The native gene, female only flower (FOF), is a desirable trait in the production of hybrid seed...

Author(s): Gongora-Canul, C. C., Aguilera-Cauich, E. A. and Martinez-Sebastián, G.

December 2017

Estimates of combining ability for resistance to pod shattering in soybean (Glycine max (L.) Merrill) genotypes

Combining ability estimates were studied for pod shattering and other agronomic traits in eight  parental soybean genotypes of different pod shattering group namely: susceptible to pod shattering, moderately resistant to pod shattering were crossed in a 4 x 4 North Carolina mating design II to generate 16 crosses, due to missing stands encountered in some crosses, 9 successful F1S hybrids were obtained in the...

Author(s): F. A. Umar, M. S. Mohammed, M. Oyekunle, I. S. Usman, M. N. Ishaq and S. N. Dachi

November 2017

Evaluation of five botanical powders against maize weevil, Sitophilus zeamais (Motsch.) (Coleoptera: Curculionidae) on maize (Jibat variety) under laboratory condition

The present study was emphasized on low input technology entitled “Evaluation of five botanical powders against maize weevil, Sitophilus zeamais (Motsch.) (Coleoptera: Curculionidae) on maize (Jibat variety) under laboratory condition”, thereby decreasing the loss of maize in storage. Leave powder of five botanical used at four doses such as 2, 5, 8 and 11% weight by weight with maize seeds were evaluated in...

Author(s): Tufa Bulto, Mohammad Dawd and Surendra Kumar Singh

November 2017

Genetic diversity in speckled bean (Phaseolus vulgaris L.) genotypes in Ethiopia

In the present investigation, the genetic variability of 64 speckled type common bean genotypes were evaluated at Haramaya University during 2015 cropping season using 8 × 8 simple lattice design with three replications. The analysis of variance indicated highly significant (P<0.01) differences among genotypes for all the nine characters studied. High genotypic coefficient of variation (GCV) was observed for...

Author(s): Yonas Moges Gelaw

October 2017

Genetic inheritance of resistance to Fusarium redolens in cowpea

Fusarium related root rots have been associated with reduced cowpea productivity in Uganda. Sources of genetic resistance to Fusarium redolens which was found to be the most virulent have been identified but the mode of inheritance of the genes conferring the resistance is unknown. This study aims to investigate how the genes for resistance to F. redolens are inherited in cowpea. Four F. redolens root rot resistant...

Author(s): Namasaka Roy Wanjala, Geoffrey Tusiime, Orawu Martin, Paul Gibson, Symphorien Agbahoungba, Alladassi Mahulé Elysé Boris and Richard Edema

October 2017

Genetic variability, correlation and path analysis of yield and grain quality traits in bread wheat (Tritium aestivum L.) genotypes at Axum, Northern Ethiopia

Forty-nine bread wheat genotypes were tested at Axum, Northern Ethiopia in 2016/17, with the objective of assessing the extent of genetic variation, correlation and path analysis of wheat genotypes in yield and grain quality traits using 7 x 7 triple lattice design. Data were collected for 17 agronomic and grain quality characters. For each of the test entries, samples of 500 g grains were taken from each plot for...

Author(s): Berhanu Meles, Wassu Mohammed and Yemane Tsehaye

October 2017

Combining ability of tropical early maize (Zea mays L.) inbred lines for grain yield and resistance to maize streak virus disease

Maize is an important cereal crop in sub-Saharan Africa but production is adversely affected by maize streak virus disease (MSVD). In Ghana, re-occurrence of the disease has been reported in several regions, therefore, necessitating the development of resistant hybrids as the most sustainable and economical option. The objectives of the study were to identify parents and hybrids that combine MSVD resistance with high...

Author(s): Adenike Damilola Ige, Richard Akromah, Allen Oppong and Idris Ishola Adejumobi

September 2017

Estimation of heterosis and combining ability in maize (Zea mays L.) for maize lethal necrosis (MLN) disease

Nature of gene action and genetic parameters for disease resistance are important attributes in developing resistant cultivars. This provides the sustainable, economically justifiable and environmentally friendly means of controlling plant diseases. In this study 6 x 6 full diallel cross involving genetically divergent maize inbred lines was performed with the aim of developing resistant cultivars against Maize Lethal...

Author(s): Kiyyo J. G. and Kusolwa P. M.

September 2017

Evaluation of seventy six sugarcane families at early selection stages

An experiment was conducted on sugarcane families belonging to the early selection stage of the Sugarcane Research Institute, Kaiyuan, Yunnan Academy, China, to evaluate them for the selection of superior families for the later stages of the breeding program. Seventy-six full-sib families and check variety were evaluated. The experiment was conducted during two growing seasons, corresponding to the plant cane and first...

Author(s): Eid M. Mehareb, Yang kun, Zhao Jun, Fouz  F Aboelenen, Qin Wei, Zan Fenggang, Liu Jiayong,  Xia Hongming, Yao Li, Zhao Peifang, Zhao Yong and Wu Caiwen

September 2017

Performances of selected tropical white maize single-cross hybrids for yield and yield attributing traits

In Ghana, the production of hybrid maize is at its infant stage, occupying only about 3% of the area devoted for maize production. Therefore, the yields of this crop are low, 1.7 t ha-1 due to the use of open pollinated varieties (OPVs), shortage of high yielding varieties, biotic and abiotic stresses. Thus, the present study was designed to identify superior crosses based on their agronomic performance. Thirty-two...

Author(s): Yazachew Genet Ejigu, Pangirayi Bernard Tongoona and Beatrice Elohor Ifie

August 2017

Morphological distinctiveness between Solanum aethiopicum Shum group and its progenitor

Use of morphological markers offers an alternative in germplasm discrimination of research-neglected crop species. A collection of 25 accessions including five wild progenitors was evaluated in screen house to identify the morphological difference between Solanum aethiopicum Shum and Solanum anguivi. An Unweighted Pair Group Method with Arithmetic mean hierarchical clustering revealed presence of moderate structure with...

Author(s): Godfrey Sseremba, Pangirayi Tongoona, John Savior Yaw Eleblu, Eric Yirenkyi Danquah, Nahamya Pamela Kabod, and Elizabeth Balyejusa Kizito

August 2017

Introgresion of the SH3 gene resistant to rust (Hemileia vastatrix) in improved lines of CASTILLO® variety (Coffea arabica L.)

The genetic improvement at Cenicafé has developed varieties with resistance to Coffee Leaf Rust (CLR) (Hemileia vastatrix) derived from the Timor Hybrid. These varieties have durable rust resistance, especially against race II, the predominant race. In Colombia, these varieties have been cultivated for three decades and still show resistance. Recently, new rust races have appeared attacking these varieties....

Author(s): Andrea Valencia, Alexa Yadira Morales, María del Pilar Moncada, Hernando Alfonso Cortina, and Juan Carlos Herrera

August 2017

Agronomic performance evaluation of cowpea [Vigna unguiculata (L.) Walp] varieties in Abergelle District, Northern Ethiopia

Cowpea (Vigna unguiculata L.) is one of the most important grain legumes in the semi-arid regions of many African countries including Ethiopia. However, it is less cultivated and scarcely distributed pulse crop in Abergelle due to a lack of improved varieties. A field experiment was conducted during the 2014 and 2015 main cropping seasons using a randomized complete block design with three replications to evaluate seven...

Author(s): Fantaye Belay, Atsbha Gebreslasie and Hintsa Meresa

July 2017

Diallel analysis of cowpea populations for resistance to Cowpea aphid-born mosaic virus disease (CABMV) in Burkina Faso

Cowpea aphid-born mosaic virus disease (CABMV) is one of the reasons for rejection of cowpea seed by seed inspectors in Burkina Faso. With regard to this, this study was undertaken to analyze the genetic components underlying the resistance of cowpea lines to the cowpea aphid-borne mosaic virus (CABMV) and to determine the mechanism of transmission of the resistance from parents to offspring. Therefore, crosses were...

Author(s): Barro Antoine, Batieno Benoit Joseph, Tignegre Jean-Baptiste, Dieni Zakaria, Sidibe Hamadou and  Sawadogo Mahamadou

July 2017

Reaction of introduced Korean rice genotypes for resistance to rice blast in Uganda

Rice blast caused by Magnaporthe grisea is an economically important disease which distributed in most rice growing areas of the world. Yield losses up to 100% are attributed to the blast disease in different rice growing regions of Uganda. In order to combat this disease screening of forty-six introduced Korean rice accessions and two checks IR-64 (resistant) and NERICA-1 (susceptible) were done in a 6 by 8 alpha...

Author(s): Zelalem Zewdu, Paul Gibson, Jimmy Lamo and Richard Edema

July 2017

Cocoa floral phenology and pollin ation: Implications for productivity in Caribbean Islands

Cocoa midges [Forcipomyia sp (Diptera: Cerato-pogonidae)] are major pollinators of cocoa and it is assumed that the number of fertilized pods and the increase in bean numbers may be the approach to enhancing cocoa yield. An insect survey using suction traps was employed to estimate the midge population dynamics in three Caribbean territories. Separate studies were conducted on the cocoa floral and reproductive phenology...

Author(s): Puran Bridgemohan, Kim Singh, Euphemia Cazoe, Garvin Perry, Aphzal Mohamed and Ronell SH Bridgemohan

June 2017

Inheritance of resistance to common bacterial blight in four selected common bean (Phaseolus vulgaris L.) genotypes

Common bacterial blight (CBB) is the most serious bacterial disease of common bean in Uganda. It causes severe yield losses of up to 62%. Genetic resistance is the most effective option for controlling CBB in smallholder common bean production systems. This study was carried out to determine the inheritance pattern of CBB resistance in leaf and pod of four new resistance sources. The four resistant and four susceptible...

Author(s): Boris M. E. Alladassi, Stanley T. Nkalubo, Clare Mukankusi, Eric S.Mwale, Paul Gibson, Richard Edema, Carlos A. Urrea, James D. Kelly and Patrick R. Rubaihayo

June 2017

Variation in the susceptibility of okra (Abelmoschus esculentus L. Moench) genotypes to okra mosaic virus and Podagrica species under field conditions

A total of 21 okra (Abelmoschus escuentus L. Moench) genotypes were screened for their reactions against okra mosaic disease (OMD) and flea beetles (Podagrica species) infestations in field trials which were conducted from May to October, 2015 (wet season) and November 2015 to March 2016 (dry season), in order to identify sources of resistance and or tolerance. The trials were laid out in a randomised complete block...

Author(s): Elvis Asare-Bediako, Faustina Agyarko, Martin Verbeek, Kingsley J. Taah, Aaron Asare, Frimpong K. Agyei, Justice Sarfo, Moses Jojo Eghan and Rofella Combey

May 2017

Improvement of physic nut (Jatropha curcas L.) by intraspecific hybridization between ecotypes of Africa and Americana

Jatropha curcas is a plant with several attributes, multiples uses and considerable potentials. To mitigate the effects of climatic change, it is necessary to alleviate fossil power energy and increase biofuel energy. Plant-based fuels are among the best renewable sources, and their use can lead to a better balance of CO2 and other greenhouse gases responsible for global warming. The aim of this work was to study the...

Author(s): Ayizannon R. G., Ahoton L. E., Ezin V., Quenum  F. and Mergeai G.

May 2017

Molecular diagnostics of groundnut rosette disease agents in Uganda: Implications on epidemiology and management of groundnut rosette disease

The objective of this study was to use molecular diagnostic tools to detect the agents of groundnut rosette disease (GRD) to guide in varietal development and disease management. Samples were collected from both GRD infected and healthy plants and sites geo-referenced. RNA extraction, cDNA synthesis, polymerase chain reaction (PCR) amplification, electrophoresis, staining and visualization were performed according to...

Author(s): David Kalule Okello, Michael Adrogu Ugen, Phinehas Tukamuhabwa, Mildred Ochwo-Ssemakula, Thomas Lapaka Odong, John Adriko, Faith Kiconco, Allan Male and Carl Michael Deom

April 2017

Inheritance of resistance to brown spot disease in upland rice in Uganda

Brown spot disease caused by Bipolaris oryzae [Breda de Haan (Shoem.)] is one of the most important diseases affecting rice (Oryza sativa L.) worldwide. Host plant resistance is considered an effective, cheap and environment friendly means of managing this disease. Nine rice genotypes with varying resistance levels were crossed in a full diallel mating design including reciprocals and parents. Parents, reciprocals and...

Author(s): Marco Martin Mwendo, Mildred Ochwo-Ssemakula, Saul Eric Mwale, Jimmy Lamo, Paul Gibson and Richard Edema

April 2017

Genotype × environment interactions and oil content stability analysis of peanut (Arachis hypogaea L.) in Northern Cameroon

High oil content of peanut is a crucial trait for the processing industry, especially in developing countries where most peanuts are for a major source of cooking oil. Twelve peanut (Arachis hypogaea L.) varieties were evaluated at three northern Cameroon locations for two consecutive seasons in order to estimate variability and stability of performance for seed oil content. A randomized complete block design replicated...

Author(s): Souina Dolinassou, Jean Baptiste Tchiagam Noubissié, Malhala Mamoudou, Richard Marcel Nguimbou and Nicolas Yanou Njintang,

March 2017

Genotypic evaluation of sugarcane (Saccharum spp. Hybrids) clones for sucrose content in western Kenya

Sugarcane variety development programmes primarily envisage breeding of varieties with high cane yields and high sugar content in specific environmental conditions. Key components associated with sugar yields are tonnes of cane per hectare and sucrose content. A study was undertaken to evaluate 22 introduced sugarcane genotypes with three checks (KEN 83-737, EAK73-335 and D8484) for sucrose content in western Kenya. The...

Author(s): Edwin Shikanda, Japheth Jamoza and Oliver Kiplagat

February 2017

Estimates of combining ability and heritability in cowpea genotypes under drought stress and non-stress conditions in Uganda

Cowpea is an important source of food and income for small scale farmers in Uganda. Production is, however, affected by both biotic and abiotic stresses. Drought stress has recently emerged as a serious concern due to the effects of climate change. This study was therefore undertaken to estimate the general and specific combining ability effects of parents and crosses as well as estimate the heritability of delayed leaf...

Author(s): Saul Eric Mwale, Mildred Ochwo Ssemakula, Kassim Sadik, Boris Alladassi, Patrick Rubaihayo, Paul Gibson, Wales Singini and Richard Edema

February 2017

Induction of flowering in cassava through grafting

Flowering in cassava is related to branching. Erect plant architecture is usually preferred by farmers but results in late and scarce flowering, which slows down breeding and genetic studies. The objective of this study was to induce earlier and more abundant flowering, which have become key research needs for cassava. Six non- or late-flowering genotypes were selected for grafting on a profuse, early flowering...

Author(s): H. Ceballos, J. J. Jaramillo, S. Salazar, L. M. Pineda, F. Calle and T. Setter

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