论文部分内容阅读
骨干亲本是水稻育种的重要基础,对骨干亲本的演变及多样性分析有利于骨干亲本的利用和新品种选育。对辽宁省1981-2010年审定的221个水稻品种进行系谱分析,结果表明,福锦、黎明、丰锦、辽粳5号、辽盐2号、辽粳326、沈农91、旱72、沈农265、辽粳454、辽粳294、辽粳207、丹粳4号、中辽9052、盐丰47、越光共16个品种是辽宁省水稻品种选育过程中的骨干亲本。但随着育种时间的推移,骨干亲本不段更替,亲本利用愈加向少数骨干亲本集中。在此基础上利用系谱分析、亲缘系数分析等方法分析了骨干亲本间的亲缘关系,结果表明,福锦、黎明、丰锦、辽粳5号、辽盐2号、辽粳326、沈农91、旱72、沈农265、辽粳454、辽粳294、辽粳207、中辽9052、越光等骨干亲本有直接或间接的系谱关系,骨干亲本间的亲缘系数平均为0.159。对骨干亲本23个表型性状进行主坐标分析显示,16个骨干亲本可聚到4个类群中。显示出骨干亲本间较近的亲缘关系和较小的表型差异。
The backbone parents are the important basis for rice breeding. The evolution and diversity analysis of the backbone parents are beneficial to the utilization of the backbone parents and breeding of the new varieties. The results of pedigree analysis of 221 rice cultivars approved by Liaoning Province from 1981 to 2010 showed that the highest yield of 221 rice varieties in Fujin, Liming, Fengjin, Liaojing 5, Liaoyan 2, Liaojing 326, Shennong 91, A total of 16 cultivars, Nongzong 265, Liaojing 454, Liaojing 294, Liaojing 207, Danjing 4, Zhongliao 9052, Yanfeng 47 and Koshihikari were the key parents in rice breeding in Liaoning Province. However, with the passage of breeding time, the backbone parents did not change step by step, and the parental use became more and more concentrated in the few backbone parents. Based on this, the genetic relationship among the backbone parents was analyzed by pedigree analysis and phylogenetic analysis. The results showed that the relationships between the parents of Fujiang, Liming, Fengjin, Liaojing 5, Liaoyan 2, Liaojing 326, Shennong 91 , Drought 72, Shennong 265, Liaojing 454, Liaojing 294, Liaojing 207, Zhongliao 9052 and Koshihikari. The average genetic correlation coefficient between backbone parents was 0.159. Principal coordinate analysis of 23 phenotypic traits in the backbone parents revealed that 16 backbone parents could be clustered into 4 taxa. Showing a closer genetic relationship between the backbone parents and smaller phenotypic differences.