Genome plastome interaction in sunflower 2. mutant plastome in various genotypic environments and its effect on heterosis
Razoriteleva, E.K.; Beletskii-Yu, D.
Genetika 15(8): 1420-1426
Crossing 3 extranuclear chlorina chlorophyll mutants obtained from 3629 line with a number of other sunflower lines did not remove chlorophyll deficiency in the F1. The mutant plastome effect on heterosis in hybrids was found with respect to following quantitative characters: plant height, 1000-seed weight, husk, oil content. Mutant plastids maintain as a rule a high level of nucleus-conditioned heterosis for the oil content. The extranuclear chlorophyll mutants differed in their specific combining ability. The plastome probably determined the specific combining ability inherent in various lines.