CAJ | 학술논문

[目的]对高异交率偏粳型广亲和不育系春江19A的选育与利用研究。[方法]以春江16A为母本，用籼粳杂交后代材料B125作父本杂交，经连续多代回交转育，以筛选得到高异交率偏粳型广亲和不育系。[结果]春江19A为迟熟中粳不育系，育性稳定，不育株率和花粉败育率均为100％，程氏指数14，属偏粳型，花时早，部分柱头外露，异交结实率高，广亲和性好，条纹叶枯病抗性好，配合力好。利用春江19A所配制的杂交稻组合具有分蘖力强、杂种优势明显、条纹叶枯病抗性好、产量潜力大、后期转色好等特点。[结论]春江19A的转育成功，为选育制种产量高、杂种优势强的杂交粳稻和籼粳亚种间杂交稻组合奠定了良好的基础，具有良好的应用前景。
[목적]대고이교솔편갱형엄친화불육계춘강19A적선육여이용연구。[방법]이춘강16A위모본，용선갱잡교후대재료B125작부본잡교，경련속다대회교전육，이사선득도고이교솔편갱형엄친화불육계。[결과]춘강19A위지숙중갱불육계，육성은정，불육주솔화화분패육솔균위100％，정씨지수14，속편갱형，화시조，부분주두외로，이교결실솔고，엄친화성호，조문협고병항성호，배합력호。이용춘강19A소배제적잡교도조합구유분얼력강、잡충우세명현、조문협고병항성호、산량잠력대、후기전색호등특점。[결론]춘강19A적전육성공，위선육제충산량고、잡충우세강적잡교갱도화선갱아충간잡교도조합전정료량호적기출，구유량호적응용전경。
[Objective] To breed and utilize the japonicalinous cytoplasmic male sterile （CMS） line Chunjiang 19A with wide compatibility and high outcrossing rate. [Method] Cbunjiang 16A was used as the female parent to cross with Indica-Japonica crossing material B125, which was used as male parent. Backcross breeding was contin- ued for consecutive generations to breed the CMS lines with wide compatibility and high outcrossing rate. [Result] Chunjiang 19A is a late medium Japonica CMS line with good fertility stability. The proportion of sterile plants and pollen abortion rates are 100% and the Cheng＇s index is 14. It is the japonicalinous CMS line with early flowering, partial stigma exsertion, high outcrossing rate, wide compatibility, high re- sistance to stripe disease and good combining ability. The hybrid rice combinations originated from Chunjiang 19A have strong tUlering ability, dominant heterosis, high resistance to stripe disease, great yield potential and good color change at mature stage. [Conclusion] The successful breeding of Chunjiang 19A laid good foundation for the breeding of Japonica hybrid rice and Indica-Japonica hybrid rice combinations with high seed production and dominant heterosis, showing a promising application prospect.