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Acta Prataculturae Sinica ›› 2021, Vol. 30 ›› Issue (11): 87-97.DOI: 10.11686/cyxb2020413

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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

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