陆地棉种子物理性状的发育遗传研究  

Genetic Analysis for Developmental Behavior of Some Seed Physical Traits in Upland Cotton (Gossypum hirsutum L.)

作　　者：叶子弘[1] 卢正中[1] 朱军[1] 

机构地区：[1]浙江大学农学系,浙江杭州310029

出　　处：《棉花学报》2001年第6期323-329,共7页Cotton Science

基　　金：国家自然科学基金 ( 39670 390 )

摘　　要：应用包含基因型×环境互作的二倍体种子遗传模型及非条件和条件的分析方法对子指、仁指、种仁率及种子容重的双列杂交两年数据进行发育遗传研究。结果表明 ,4个性状在各个时期均存在显著的直接、细胞质和母体方差 ,并以母体方差较大。条件遗传分析发现 ,在某些无法检测到非条件遗传方差的时期存在显著水平的条件方差。同一性状不同时期的相关分析表明 ,子指、仁指和种仁率在大部分时期存在显著的母体加性和母体显性相关。但种子容重各个发育阶段之间的母体相关系数几乎均为零。成对性状之间的相关研究表明 :种子容重和其它三个性状之间的大部分相关系数不显著 ;各成对性状在各时期存在显著的母体加性相关 ;性状间的相关程度及相关性质随着发育进程的改变而呈动态变化 ;性状最终时刻的相关表现无法完全体现在整个发育过程中的动态变化。Analysis of genetic main effects and GE interaction effects for seed index (SID), kernel index (KID), kernel percentage (KP) and seed density (SDN) of Upland cotton (Gossypium hirsutum L.) were conducted for 2 yr diallel cross data by using a diploid seed genetic model with genotype×environment interaction. Analysis approaches of unconditional and conditional variance and correlation were employed to evaluate developmental behavior of cottonseed. The results indicated that significant variance due to direct, cytoplasm, and maternal were detected for four seed physical traits at four stages. Among them, genetic effects of maternal were relatively large. Significant conditional variances were found at some stages while no unconditional ones being detected. Correlation analysis between same trait at different stages indicated that there existed significant coefficients due to maternal additive and dominant effects for SID, KID, and KP at most stages. While for SDN, nearly every maternal coefficient was zero. The analysis of correlation between different pair of traits showed that most coefficients of SDN and other three traits were not significant from zero. Furthermore, it was remarkable that coefficients due to maternal additive were observed for every pair of traits at most stages. Not only the degree of the correlation between different pair of traits but also the direction of the correlation was changeable at different stages. The correlation results of final traits could not fully indicate the dynamic procedure during the whole developmental period.

关 键 词：棉花种子 品质性状 陆地棉种子 物理性状 发育遗传 

分 类 号：S562.032[农业科学—作物学]