中国烟草科学2009，Vol.30Issue(3)：28-32,5.
白肋烟主要农艺性状的杂种优势及其遗传分析
The Heterosis and Genetic Analysis of Main Agronomic Traits of Burley Tobacco
摘要
Abstract
Based on A-D genetic model the heterosis and genetic characteristics of 7 agronomic traits were studied for 6 burley tobacco varieties. 21 genotypes designed by Griffing II diallel cross method. The results showed that the heterosis varied in different agronomic traits and different crossing combinations. Population heterosis over parent mean (Hpm) was in accordance with the △ value of homozygous dominance effects, which indicated that six agronomic traits except the length of middle leaves, including plant height with greater Hpm, stalk circumference, node length, angle of leaf and inflorescence, leaf number and the width of middle leaves had a great positive heterosis. Number of crosses conferred no significant population heterosis over parent better (Hpb) for all seven agronomic traits. Plant height and node length had a little positive Hpb. General heritability in the broad sense (HB) was 0.18~0.58, which implied that phenotypic variations of all seven agronomic traits were mainly controlled by environmental effects and random errors. Leaf number had higher general heritability in the narrow sense (HN), followed by node length, the width of middle leaves, plant height, angle of leaf and inflorescence, stalk circumference and the length of middle leaves, respectively. The unbiased estimate results of genetic random effect variance components showed that only dominance effect controlled the genetic variation of the length of middle leaves, and additive effect and dominance effect did the genetic variation of other agronomic traits. For plants height, the width of middle leaves and node length, their additive effects were significantly different at 0.01 probability levels among these varieties.关键词
白肋烟/杂种优势/加性效应/显性效应/遗传率Key words
burley tobacco/heterosis/additive effect/dominance effect/heritability分类
农业科技引用本文复制引用
王毅,程君奇,蔡长春,林国平,黄文昌,周永碧,肖宗友..白肋烟主要农艺性状的杂种优势及其遗传分析[J].中国烟草科学,2009,30(3):28-32,5.基金项目
国家烟草专卖局资助项目"优质抗病白肋烟新品种选育"(110200601004) （110200601004）
