Inheritance of determinants specific for physiological heterosis basis in rice hybrids | Наследование признаков, определяющих физиологический базис гетерозиса у гибридов риса
2010
Goncharova, Yu.K., All-Russia Research and Development Inst. of Rice, Krasnodar (Russian Federation)
The inheritance of determinants (growth speed of radical and stem, duration of leaf area photosynthetic activity, sensitiveness to level of mineral nutrition, content of a, b chlorophylls and carotenoids) specific for physiological heterosis basis in hybrids was investigated in six rice varieties and 30 hybrid combinations. It was shown, that resulting determinant manifestation is determined both intergenic and intraloci interaction, but the main role belongs to additive gene effects. The polygenic character of inheritance and nondirectional domination among studied determinants were revealed. The superdominance is specific for stem growth speed, but the incomplete domination of major portion of parameters — for other determinants. The domination of majority parameters increased the adaptability permits to obtain the complex of useful genes already in F1
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