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Genetic
variability and association studies of some quantitative
characters in winter rapeseed (Brassica napus L.)
Zehra Aytaç* and
Gülcan Kınacı
Department of Field Crops, Faculty of Agriculture, Eskisehir
Osmangazi University, 26480 Eskisehir, Turkey.
*Corresponding author. E-mail:
zehrak@ogu.edu.tr.
Accepted 16 June, 2009 |
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Information of the variability and the extent and type
of relationship of some quantitative characters in rapeseed
is
important for an efficient breeding program. In addition,
the association between seed yield and quality characters,
oil and protein content, is of major interest.
10 winter rapeseed genotypes were evaluated for variation,
genetic and phenotypic correlations and broad sense
heritability for seed yield, yield and quality
characters for 2 years.
The results revealed significant differences
for all yield and quality
characters indicated the presence of sufficient genetic
variability for effective selection. Variability,
broad sense heritability, genetic advance were maximum for
oil yield, seed yield followed by protein yield. In
addition, very strong correlations were estimated among
them. Simultaneous selection regarding seed yield would be
an effective way to increase oil yield and protein yield.
Plant height was associated with seed yield, oil yield,
protein yield, number of pods on main stem and pod length.
In conclusion, plant height, pod length, oil yield and
protein yield were efficient characters as selection
criteria.
Key words:
Genetic correlation, genotypic coefficient of variation,
heritability, yield, quality, Brassica napus L.
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