쌀胚乳의 Alkali 崩壞性의 遺傳 Ⅰ. 高ㆍ低 Alkali 崩壞性組合에서 雜種種字(F₁)의 Alkali 崩壞性의 表現과 그 遺傳分離

Genetic Behavior of Alkali Digestibility in Rice Endosperm Ⅰ. Alkali Digestibility of Hybrid Seeds (F₁) and F₂ Grains in the Cross between Low and High ADV Parents

Alkali digestibility value (ADV) were tested for the F₁ and F₂ seeds of the cross between high ADV and low ADV parents. Hybrid seeds of four possible different combinations between low and high ADV parents, i.e. LLL, LLH, HHL, and HHH, were obtained at high and low temperature utilizing cytoplasmical male sterility to minimize the influences of hybridization operations. ADV of four different hybrid LLL, LLH, and HHH were 1.50, 1.75, 2.00 and 5.75 at high temperature and 1.75, 2. 00, 2.63 and 6.00 at low temperature respectively. ADV of F₂ seeds turned out 3 low to 1 high at both temperature. From the results, it was concluded that the ADV is controlled by one major gene, low ADV being dominant over high ADV, and a few minor genes which modifying the ADV of different high/ low dosages of endosperm.