EFFECT OF GPC-B1 AND Y GENES ON DURUM WHEAT (Triticum durum Desf.) QUALITY TRAITS
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Date
2011
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Punjab Agricultural University, Ludhiana
Abstract
The present study is based on molecular markers and quality analysis of F3 lines derived
from two crosses. The first cross (UC 1113 + Gpc-B1 X PDW 291) was used to investigate
the effect of Gpc-B1 gene by marker (Xucw 108) based identification of F3 lines
carrying/lacking the gene and associating it with a set of durum wheat quality parameters.
Gpc-B1 gene is originally derived from T. diococcoides. Presence of Gpc-B1 gene resulted in
an average increase in grain protein content of 7.11 %. On an average F3 lines positive for
Gpc-B1 gene showed lower 1000 grain weight, test weight, grain hardness and yellow
pigment content. The analysis of variance also showed a significant influence of Gpc-B1
gene on grain protein content as well as 1000 grain weight, test weight, grain hardness,
yellow pigment content and days to 50% flowering. Inter-trait correlation in the set of F3
lines showed negative correlation between grain protein content and 1000 grain weight and
test weight (-0.45 and -0.55). The second cross (UC 1113 + Y X PDW 291) was used to
investigate the effect of Y gene by marker (BF145935) based identification of F3 lines
carrying/lacking the gene and associating it with a set of durum wheat quality parameters. Y
gene is originally derived from Lopophyrum ponticum. Presence of Y gene resulted in an
average increase in yellow pigment content of 24.03%. On an average F3 lines positive for Y
gene showed lower 1000 grain weight, test weight and grain hardness. The analysis of
variance also showed a significant influence of Y gene on yellow pigment content as well as
1000 grain weight, test weight, grain hardness, sedimentation value and days to 50%
flowering. Inter-trait correlation in the set of F3 lines showed negative correlation between
yellow pigment content and 1000 grain weight, test weight and grain hardness (-0.65, -0.48
and -0.50). Both these genes have clear positive effect on the primary traits (grain protein
content and yellow pigment content) influenced by them. The two genes thus hold promise
for Indian durum wheat breeding.
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