II.28. Parental form genotype affecting protein content in F and F2 hybrids.
G. F. Nikitenko and M. A. Polukhin. Agricultural Research Institute of Central Regions in Non-Chernozem Zone, The U.S.S.R., 143013, Moscow-Nenchinovka.
It has been established that the quality of barley hybrid grain is directly correlated with the initial parental forms (T. Osborn, 1935; K. Frey, 1949; D. Briggs, 1963; E. D. Emmerih, 1966).
We have studied F1 and F2 hybrids from 25 combinations of crossing spring barley varieties differing in protein content. Crosses of parental varieties have been carried out according to the following scheme, which took into account their protein content: "Low x Low" (L x L), "Low x Average" (L x A), "Low x High" (L x H), "Average x Low" (A x L), "Average x Average" (A x A), "Average x High" (A x H), "High x High" (H x H), "High x Average" (H x A), "High x Low" (H x L).
The analysis of the obtained data has shown that protein content in the grain of initial parental forms affects significantly this index in F1 and F2 hybrids (Table 1).
Table 1. Variation of protein content in Fl and F2 hybrid grain depending on parental form genotype (1971).
Grouping of F2 hybrid plants according to their class of protein content (Table 2) makes it possible to suggest that using spring barley varieties with a high protein content in the grain as initial ones for crossing leads to a significant increase of protein content in hybrids and visa versa. The protein content in hybrids invariably increases or decreases irrespectively of how high protein or low protein forms are crossed - direct or back.
Table 2. Hybrid F2 grouping according to protein content as dependent on the quality of parental varieties (1971).
BGN 3 toc
BGN Main Index