论文部分内容阅读
对 K、V、Un、L、Sh型等5种小麦细胞质雄性不育系的分析结果表明,K、V、Un型不育系的恢复源广,且Un型不育系的恢复度普遍较高;L、Sh型不育系可被3个T型恢复系所恢复,且恢复度也较高。K、V、Un型的不育-恢复机制比较相似.但也存在着差别。杂种优势分析结果表明,杂种小麦籽粒产量优势普遍存在,平均超中亲16.92％、超高亲12.67％。产量构成因素的杂种优势大小次序为:单株穗数>千粒重>单穗粒数。恢复度不高是“三系”杂种小麦优势较小的主要原因之一,也可能是导致杂种营养生长优势相对超过生殖生长优势的原因。K、V型不育系杂种优势较小,L、Un和Sh型不育系杂种优势较强,尤其以L、Un型优势比较突出。
The results of five kinds of wheat cytoplasmic male sterile lines (K, V, Un, L, Sh) showed that the recovery sources of K, V and Un type sterile lines were wide, and the recovery rate of Un type sterile lines was generally higher than that of Un type sterile lines High; L, Sh sterile lines can be restored by three T-type restorers, and the recovery is also higher. K, V, Un type of infertility - recovery mechanism is similar, but there are also differences. Heterosis analysis showed that the yield advantage of hybrid wheat was widespread, with an average of 16.92% of super-middle-sons and 12.67% of super-ancestry. The order of the heterosis of the yield components was: the number of panicles per plant> 1000-grain weight> the number of grains per spike. The low recovery is one of the main reasons why the “three lines” hybrid wheat has a smaller advantage. It may also be the reason that the hybrid nutrition growth advantage relatively exceeds the reproductive growth superiority. The heterosis of K and V CMS lines was smaller, and the heterosis of L, Un and Sh CMS lines was stronger, especially the L and Un types were more prominent.