摘要
对6个烤烟自育高钾新品系和8个烤烟品种配制F_1的杂种优势研究表明,F_1烟叶钾含量平均优势在部位间存在差异,表现为B2F(8.45%)>X2F(7.59%)>C3F(5.64%);F_1各部位钾含量超亲优势均不明显,表现为X2F(0.05%)>C3F(-0.43%)>B2F(-0.48%);F_1钾含量的对照优势表现为B2F(17.81%)>X2F(4.06%)>C3F(1.12%)。高钾新品系烟叶在各部位钾含量的GCA方差均达到显著或极显著水平,其中GK2各部位GCA效应均较优,利用潜力较大;GK7的C3F、X2F GCA效应较优,而B2F较差;GK9的B2F GCA效应较优,C3F较差。烟叶各部位的钾含量SCA方差均为极显著水平,其中B2F的多叶87×GK7组合(17.19%)、C3F多叶87×GK2组合(25.63%)、长脖黄×GK5组合(19.43%)、云烟87×GK7组合(22.78%)、云烟87×GK9组合(24.38%),X2F的Coker176×GK7组合(19.87%)、101×GK9组合(15.89%)、云烟85×GK9组合(19.15%)、云烟87×GK9组合(20.74%)SCA效应较好。
F1 potassium heterosis of 8 flue-cured tobacco varieties and 6 self-bred high-potassium new strains were studied. The results showed that the F1 mean het- erosis of potassium content had differences between different parts of plants, showing B2F (8.45%)〉X2F (7.59%)〉C3F (5.64%); the F1 over-parent heterosis of potassium content of various parts was not obvious, showing X2F (0.05%)〉C3F (-0.43%) 〉B2F (-0.48%); the F, control heterosis of potassium content of different parts showed B2F (17.81%)〉X2F (4.06%)〉C3F (1.12%). The variance of GCA of potassium content in various parts of the 6 self-bred high-potassium new strains was significant or extremely significant, and all leaves of GK2 had greater GCA effect on potassium content; C3F and X2F of GK7 had good GCA effect on potassium con- tent, but GCA effect was bad in B2F; GK9 preformed well in B2F but badly in C3F. The variance of SCA in all combinations was extremely significant, and the good combinations included Duoye 87xGK7 (17.19%) in B2F, Duoye 87xGK2 (25.63%), ChangbohuangxGK5 (19.43%), Yunyan 87xGK7 (22.78%), and Yunyan 87xGK9 (24.38%) in C3F, Coker176xGK7 (19.87%), 101xGK9 (15.89%), Yunyan 85xGK9 (19.15%), and Yunyan 87xGK9 (20.74%) in X2F.
基金
2014年中国烟草总公司重点项目(110201402003)~~
关键词
烤烟
高钾
杂种优势
Flue-cured tobacco
High potassium
Heterosis