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Complex
traits mapping using introgression lines in pepper (Capsicum
annuum)
Abu Kargbo and Cai-yun Wang*
Key Laboratory for Horticultural
plants Biology of MOE, Huazhong Agricultural University,
Wuhan 430070, China.
*Corresponding author. E-mail:
wangcy@mail.hzau.edu.cn. Tel: +862787282010. Fax:
+862787282010.
Accepted 15 March, 2010 |
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In this study we used introgression lines of Capsicum
annuum to fine map the location of the traits in the
chromosome responsible for fruit production, fruit
development and fruit ripening. To identify specific regions
of the genome for the measurable traits for production,
development and ripening in pepper required further
investigation using the introgression line approach.
Forty-one introgression lines of pepper (C. annum)
were used to map the QTLs for fruit production, fruit
development and fruit ripening in chromosomes. The traits
were evaluated in two glasshouses each with single and
double culture cycles. The results confirmed our earlier
results that the QTLs for fruit ripening were located at 75
- 100 cM in chromosome 4 and 0 - 100 cM in chromosome 8;
QTLs for fruit production at 0 - 100 cM on chromosome 2;
QTLs for fruit development at 0 - 50 cM on the chromosome 2
and 0 - 65 cM on chromosome 3. Genotype IL14 had a
combination of small and large segments from chromosomes 7
and 10 suggesting that two QTLs were likely involved in the
fruit ripening. Statistical analysis was done using genstat
Software package. Significant differences (P ≤ 0.05) were
found in in some of the lines for the traits tested.
Key words:
Capsicum annuum,
complex trait, mapping, chromosome, production, development,
ripening, introgression lines.
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