陆地棉棉籽不同发育期容重和种仁率的遗传分析  

Genetic analysis of seed density and kernel percentage at different developmental stages in upland cotton ( Gossypium hirsutum L.):

作　　者：骆霞虹 卢正中[1,2] 刘鹏渊 吴吉祥 朱军[1,2] 

机构地区：[1]浙江省萧山棉麻研究所 [2]浙江农业大学农学系

出　　处：《浙江农业学报》1998年第5期225-229,共5页Acta Agriculturae Zhejiangensis

基　　金：国家教委"跨世纪优秀人才专项基金";浙江省自然科学基金

摘　　要：运用二倍体种遗传模型及其分析方法，估算陆地棉（ＧｏｓｙｐｉｕｍＨｉｒｓｕｔｕｍＬ．）四个发育时期的种子容重和种仁率的遗传方差分量、协方差分量以及这两个性状之间的遗传相关。结果表明：容重和种仁率的遗传效应的作用大小和方向具有动态变化过程。容重在发育前期以直接加性效应为主，开花后４０天左右达最大值，棉籽成熟时以母体效应为主。种仁率在发育２０天时以细胞效应为主，３０天、４０天则以母体显性效应为主，种子成熟时，各个效应对其均有显著影响。Genetic model for diploid plant seeds and its analysis approaches were applied for estimating the genetic variance and covariance components and genetic correlation of cotton seed density and kernel percentage at four developmental stages (20,30,40 and 50 days after blooming).The results indicated that the magnitude and direction of genetic effects varied in different developmental stages.Direct additive effects were signficant for seed density at early stages,reaching its maximum at 40 days,but maternal effects significantly existed at seed maturation period.For kernel percentage,the main component was of cytoplasm effects at 20 days after blooming,but of maternal dominance effects at 30 days and 40 days after blooming.All highly significant effects were detected at seed maturing.

关 键 词：陆地棉 遗传 棉籽 发育期 容重 种仁率 

分 类 号：S562.032[农业科学—作物学]