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草业学报 ›› 2021, Vol. 30 ›› Issue (11): 87-97.DOI: 10.11686/cyxb2020413

• 研究论文 • 上一篇    下一篇

利用数字图像分析132份胡枝子种子表型性状遗传多样性

杨正禹(), 陆忠杰, 张茂, 董瑞()   

  1. 贵州大学动物科学学院,贵州 贵阳 550025
  • 收稿日期:2020-09-14 修回日期:2020-11-10 出版日期:2021-10-19 发布日期:2021-10-19
  • 通讯作者: 董瑞
  • 作者简介:Corresponding author. E-mail: rdong@gzu.edu.cn
    杨正禹(1995-),女,布依族,贵州黔南人,在读硕士。E-mail: 1286968330@qq.com
  • 基金资助:
    贵州大学引进人才科研项目(贵大人基合字[2017]17号);贵州省科技计划项目(黔科合基础[2019]1074);贵州省科技支撑计划项目(黔科合支撑[2020]1Y074号);国家自然科学基金(32060392)

A digital image analysis of seed phenotypic traits of 132 Lespedeza accessions

Zheng-yu YANG(), Zhong-jie LU, Mao ZHANG, Rui DONG()   

  1. College of Animal Science,Guizhou University,Guiyang 550025,China
  • Received:2020-09-14 Revised:2020-11-10 Online:2021-10-19 Published:2021-10-19
  • Contact: Rui DONG

摘要:

胡枝子属植物是重要的豆科牧草,为了解胡枝子属植物种子表型性状遗传多样性,本研究对胡枝子属的Lespedeza junceaLespedeza cuneataLespedeza capitataLespedeza bicolor 等16个种132份种质的种子数字图像信息,包括种子长(SL)、种子宽(SW)、长宽比(SL/SW)、种子周长(Pe)、种子厚(ST)、种脐长(HL)、百粒重(SY)等7个种子形态学特征进行分析。使用GenStat中的REML分析以及聚类分析和主成分分析相结合的模式分析方法。结果显示:132份胡枝子种质及L. juncea中所有种质间的种子性状都存在显著(P<0.05)差异。L. capitataL. bicolor中除性状SL/SW,L. cuneata中除性状SL/SW和Pe外,其余性状在种质间都存在显著(P<0.05)差异。测量的7个性状中,变异系数(CV)均大于5%,最高为61.95%,最小为5.42%。132份种质及4个种的SY、ST、Pe的R值均大于0.9,表明遗传稳定性强,可作为育种工作的参考指标。本研究可为胡枝子属植物分类、种质资源改良及遗传多样性研究奠定基础。

关键词: 胡枝子, 种子, 表型多样性, 遗传多样性

Abstract:

Lespedeza is an important forage legume species. In order to understand the genetic diversity of seed phenotypic traits in Lespedeza populations, digital image information was captured and collated for 132 Lespedeza accessions of 16 species, including Lespedeza junceaLespedeza cuneataLespedeza capitata and Lespedeza bicolor, among others. Seven seed morphological characteristics including seed length (SL), seed width (SW), length to width ratio (SL∶SW), perimeter (Pe), seed thickness (ST), hilum length (HL), and 100-seed weight (SY) were evaluated. Data were analysed using REML analysis in GenStat and a pattern analysis method that combines cluster analysis and principal component analysis. Significant differences (P<0.05) were found in most seed traits among the 132 Lespedeza accessions and all accessions of L. juncea. Except for the traits SL∶SW in L. capitata and L. bicolor, and the traits SL∶SW and Pe in L. cuneata, there were significant differences among accessions in all traits. For all 7 measured seed traits, the variability between seeds within accessions was greater than 5%, with the highest being 61.95%, and the lowest 5.42%. The R values of SY, ST and Pe of the 132 accessions and 4 species were all greater than 0.9, indicating strong genetic stability and that data can be used as a reference index for breeding. This research provides a good database for use in classification, germplasm resource improvement and genetic diversity research in the Lespedeza genus.

Key words: Lespedezaaccessions, seed, phenotypic diversity, genetic diversity