Query (optional)   in Class  All Allele Author Colleague Collection Assembly Gene Gene Class Gene Product Germplasm Image Journal Keyword Library Locus Map Map Data Marker Pathology Polymorphism Probe Protein QTL Rearrangement Reference Sequence Species Trait Trait Study Two Point Data  

---

GrainGenes Reference Report: TAG-88-1023

[Submit comment/correction]

Reference	TAG-88-1023
Title	Genetic analysis of carbon isotope discrimination and agronomic characters in a bread wheat cross
Journal	Theoretical and Applied Genetics
Year	1994
Volume	88
Pages	1023-1028
Author	Ehdaie B Waines J
Abstract	Carbon isotope discrimination has been suggested as a selection criterion to improve transpiration efficiency (W) in bread wheat (Triticum aestivum L. . Cultivars 'Chinese Spring' with low isotope discrimination (high W) and 'Yecora Rojo' with high isotope discrimination (low W) were crossed to develop F1, F2, BC1, and BC2 populations for genetic analysis of isotope discrimination and other agronomic characters under well-watered (wet) and water-stressed (dry) field conditions. Significant variation was observed among the generations for isotope discrimination only under the wet environment. Generation X irrigation interactions were not significant for isotope discrimination. Generation means analysis indicated that additive gene action is of primary importance in the expression of isotope discrimination under nonstress conditions. Dominance gene action was also detected for isotope discrimination, and the direction of dominance was toward higher values of isotope discrimination. The broad-sense and the narrow-sense heritabilities for isotope discrimination were 61% and 57% under the wet conditions, but were 48% and 12% under the droughted conditions, respectively. The narrow-sense heritabilities for grain yield, above-ground dry matter, and harvest index were 36%, 39%, and 60% under the wet conditions and 21%, 44%, and 20% under dry conditions, respectively. The significant additive genetic variation and moderate estimate of the narrow-sense heritability observed for isotope discrimination indicated that selection under wet environments should be effective in changing isotope discrimination in spring bread wheat.
Keyword	[ Hide all but 1 of 14 ] agronomic-characteristics carbon carbon-pathways crosses drought-resistance genetic analysis genetic effects genotype-environment-interaction heritability stable-isotopes transpiration triticum aestivum water-stress water-use-efficiency

GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.