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INHERITANCE OF GRAIN YIELD AND PROTEIN IN WINTER WHEAT (TRITICUM AESTIVUM L.) CROSSES
Abstract
Inheritance of grain protein content, grain yield and components of grain yield was investigated in crosses of four wheat cultivars or lines. Three high-protein wheat cultivars, Lancota Sel., 77Y10442 and 77Y10456, and one low protein cultivar, Bennett, were selected for this study. Two sets of crosses were made between 77Y10442/Bennett (Experiment I) and Lancota Sel./77Y10456 (Experiment II). Parents, F(,1), F(,2) and backcrosses of each cross were planted as separate experiments in the greenhouse as well as in the field, Lincoln, NE, 1981. Grain protein % of 77Y10442 was significantly higher than that of Bennett at both locations. In Experiment II (high by high) 77Y10456 was significantly different from Lancota Sel. for grain protein content only in the field results. In Experiment I (high by low) the F(,2) mean for grain protein content was near the mid-parent in the greenhouse, but in the field the F(,2) mean was above the mid-parent value. In Experiment II (high by high) the F(,2) mean for grain protein content was near the mid-parent value under field conditions. The means, variances and frequency distributions of the F(,2) generations for grain protein content, yield, 100-kernel weight, grains per spike, grains per plant and spikes per plant indicated that the traits mentioned above were inherited in a quantitative manner in these experiments. Grain protein content was negatively correlated with yield and components of yield in both experiments. The negative associations between protein and grain yield in the F(,2) generation did not exceed -.51. Grain yield and components of yield were positively correlated. Spikes per plant and grains per plant were found to be the most important components of yield in this material. Heritability estimates were inconsistent between locations for both experiments. The contribution of additive gene effects was most prominent in the inheritance of grain protein content and 100-kernel weight. Dominant gene effects were found for grains per spike under greenhouse conditions for Experiments I and II. Epistatic effects were found for grains per spike in Experiment I in the greenhouse and for grains per plant in Experiment II in the field.
Subject Area
Agronomy
Recommended Citation
CHAUDHRY, ABDUS SATTAR, "INHERITANCE OF GRAIN YIELD AND PROTEIN IN WINTER WHEAT (TRITICUM AESTIVUM L.) CROSSES" (1982). ETD collection for University of Nebraska-Lincoln. AAI8302104.
https://digitalcommons.unl.edu/dissertations/AAI8302104