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GrainGenes Reference Report: EUP-139-1

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Reference	EUP-139-1
Title	Genetics of grains per spike in durum wheat under normal and late planting conditions.
Journal	Euphytica
Year	2004
Volume	139
Pages	1-7
Author	Sharma SN Sain RS
Abstract	Parental, F SUB 1 , F SUB 2 , BC SUB 1 , BC SUB 2 , BC SUB 11 , BC SUB 12 , BC SUB 21 , BC SUB 22 , BC SUB 1 self and BC SUB 2 selfed generations of three crosses involving six cultivars of durum wheat ( Triticum durum Desf.) were studied for grains per spike under normal and late sown environments to analyze the nature of gene effects. A 10-parameter model did not fully account for the differences among the generation means. In two cases more complex interactions or linkage were involved in the inheritance of grains per spike in durum. Both digenic and trigenic epistatic interactions had a role in controlling the inheritance of grains per spike, however, trigenic interactions contributed more than digenic interactions. Non-fixable gene effects were many times higher than fixable ones in all three crosses and in both sowing environments indicating a major role of non-additive gene effects in the inheritance of this trait. Duplicate epistasis between sets of three genes under both environments was recorded for the cross Raj 911 x DWL 5002. Epistatic interactions, particularly the trigenic ones, contributed the maximum significant heterosis. Epistatic interactions involving dominance in the F SUB 2 generations caused significant inbreeding depression. Selective diallel mating and/or biparental mating could be used for amelioration of grains per spike in durum wheat
Keyword	agricultural research [ Show all 27 ]

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