[Expression of fertility during morphogenesis in self-pollinated backcrossed progenies of barley-wheat amphiploids].
The fertility characteristics expressed during morphogenesis in first-generation self-pollinated backcrossed progenies (BC1) obtained from amphiploid barley-wheat hybrids [Hordeum geniculatum All. (2n = 28) x Triticum aestivum L. (2n = 42)] (2n = 70) backcrossed with common wheat were studied. It was found that, in the case of self-pollination of BC1 plants, karyotype stabilization leads to the formation of alloplasmic euploid (2n = 42), telocentric substitution (2n = 40 + 2t), and telocentric addition (2n = 42 + 2t), (2n = 42 + 2t) plant forms, which may serve as the sources of the respective alloplasmic lines of common wheat. That the expression of fertility characters in BC1F8 plants was shown to depend on growth conditions. The main mechanism of hybrid incompatibility of BC1F1-BC1F8 plants was expressed as grass-clump dwarfism.
Pershina
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Belova
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Rakovtseva
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Shumnyĭ
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VK
D002678:Chimera; D003433:Crosses, Genetic; D005298:Fertility / Q000235:genetics; D001467:Hordeum / Q000235:genetics / Q000254:growth & development*; D007178:Inbreeding; D009024:Morphogenesis; D011058:Pollen / Q000502:physiology; D014908:Triticum / Q000235:genetics / Q000254:growth & development*