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水稻种间、亚种间杂交,常出现程度不同的 F_1杂种不育。内在机制可归因于染色体结构杂合性(Yao 等,1958;Henderson 等,1959;Shastry 和 Misra,1961;Demeterio等,1965;Engle 等,1969;Dolores 等,1975;Barrios,1981);不育基因(徐冠仁,1945;冈彦一,1953,1964,1974);或核质互作型不育(新城长友,1969)。张德慈(1976)认为,这种 F_1不育受基因不平衡及染色体异常两种因素制约。本文则以亚洲栽培稻3个生态类型(布鲁、奥斯和陆稻)为材料,研究13个亲木及其146个 F_1杂种的染
Interspecific hybridization among subspecies and subspecies of rice, often occurs in different degrees of F1 sterility. The intrinsic mechanism can be attributed to chromosomal structural heterozygosity (Yao et al., 1958; Henderson et al., 1959; Shastry and Misra, 1961; Demeterio et al., 1965; Engle et al., 1969; Dolores et al., 1975; Barrios, 1981) Genes (Xu Guanren, 1945; Okahiko I, 1953, 1964, 1974); or nuclear cytoplasmic male sterility (Changyoung, 1969). Zhang Deji (1976) that this F_1 infertility by gene imbalance and chromosomal abnormalities are two factors. In this paper, three ecological cultivars of Asian rice (Broun, Ostrich and Upland) were used as materials to study the effects of three parents and 146 F1 hybrids