GrainGenes Reference Report: WIS-98-16
Reference
WIS-98-16
Title
Genetic studies of grain filling period in durum wheat under normal and late sown environments
Journal
Wheat Information Service
Year
2004
Volume
98
Pages
16-21
Author
Sharma SN Sain RS
Abstract
Parental, F1, F2, BC1, BC2, BC11, BC12, BC21, BC22, BC1 self and BC2 self generations of 3 crosses involving 6 cultivars of durum wheat (Triticum durum) were studied for grain filling period under normal and late sown environments to analyse the nature of gene effects. A 6-parameter model in the cross Raj911 x DWL 5002 in normal sown and a 10-parameter model in other crosses under both normal and late sown conditions were found adequate to explain the inheritance of this trait. Additive (d) and dominance (h) gene effects were frequently observed significant. Of the epistatic interactions, one or the other digenic and/or trigenic interactions played significantly greater role in controlling the inheritance of this trait. Non-fixable gene effects were much higher than the fixable gene effects in all the crosses in both sowing environments. Significant positive heterosis (over better parent) was observed in the crosses Cocorit 71 x A-9-30-1 under both the sowing dates and in the cross HI 8062 x JNK-4W-128 in normal sowing. The major combined effects of digenic as well as trigenic epistatic interactions were attributed to the significant heterosis. Significant inbreeding depression was not frequently observed. Biparental mating and/or diallel selective mating have been suggested for the improvement of this trait in durum
Keyword
agriculture
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GrainGenes Reference Report: WIS-98-16
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||