摘要
对15个籼型杂交水稻亲本进行AFLP分析,结果表明:亲本间遗传距离小,在0.0589～0.3305之间,平均为0.2033。15个亲本按类平均法可聚为两类,Ⅰ类为不育系,Ⅱ类为恢复系。其中Ⅱ类又分为两个亚类,Ⅱ-1不含明恢 63血缘、Ⅱ-2全部含明恢63血缘。Ⅰ/Ⅱ-1与Ⅰ/Ⅱ-2间的遗传距离无明显差异,揭示恢复系的遗传基础较一致,这可能是当前的品种不能超过汕优63的重要原因之一。要提高水稻的杂种优势,需丰富亲本的遗传基础,扩大其遗传差异。
The polymorphisms were analyzed in 15 semilate indica parental materials with AFLPs. The genetic dis-tances between parental materials were small with an average of 0. 2033,ranged from 0. 0589 to 0. 3913. Fifteen pa-rental materials were classified into two groups,cytoplasmic male-sterile line Ⅰ and restorer line Ⅱ. The latter were classified into two subgroups, Ⅱ-1 and Ⅱ-2. Subgroup Ⅱ-2 was consanguinity with Minghui63. The genetic dis-tances between male-sterile line and two restorer line subgroups ( Ⅱ-1 and Ⅱ-2) did not show significant differ-ence, indicating that the genetic bases of restorer lines were similar,which maybe one of major reasons for the yield still not surpassing Shanyou63 in indica hybrid rice presently. To increase the heterosis of hybrid rice,we must enrich the genetic diversity and expand the genetic differences between parental lines.
出处
《遗传》
CAS
CSCD
北大核心
2002年第4期439-441,共3页
Hereditas（Beijing)
