论文部分内容阅读
采用改良的有性杂交与组织培养胚胎挽救法，进行栽培稻与澳洲野生稻的种间杂交，获得４个组合７个变异株。用具丰产性和适应性广泛的栽培稻与变异株进行杂交，选育出１２个某些经济性状明显超亲的或综合经济性状较好的种间杂交株系，可作为改良栽培稻的种质资源。以红莲型不育系作为桥梁母本进行自然授粉杂交的成功率较高。利用水稻分蘖扩繁潜力大的特点，可用大量的遗传背景不同的栽培稻作父本，与为数不多的ＡＥ杂Ｆ１代进行再杂交，可获得较多的子代材料供筛选。筛选结果说明，以广Ａ×ＳＢ１变异株与丰矮占再杂交１～２次选出的优良株系较多、效果最好。
Using improved sexual hybridization and tissue culture embryo rescue method, interspecific hybridization between cultivated rice and Australian wild rice was carried out, and 4 combinations and 7 mutant strains were obtained. The cultivars with high yield and adaptability were crossed with mutant strains, and 12 cross-breeding lines with obvious super-progeny characters or better comprehensive economic characters were bred, which could be used as improved germplasm of cultivated rice Resources. The successful rate of natural pollination hybridization with the HL hybrid CMS as the bridge parent was higher. Utilizing the great potential of rice tillering multiplication, a large number of cultivated rice with different genetic backgrounds can be used as male parents, and one of the few F1 hybrids of AE hybrids can be re-crossed to obtain more progeny materials for screening. The screening results showed that there were more excellent lines selected one to two times with wide A × SB1 mutant and Feng dwarf again, the effect was the best.