Evaluation of the genetic diversity of fibre quality traits in upland cotton (Gossypium hirsutum L.) inferred from phenotypic variations

Journal of Cotton Research

卷:2

Zhikun LI¹  Guiyin ZHANG¹  Zhengwen LIU¹  Huifeng KE¹  Zhiying MA¹  Yan ZHANG¹  Jun YANG¹  Liqiang WU¹  Xingfen WANG¹  Jinhua WU¹  Zhengwen SUN¹  Qishen GU¹ 

[1] North China Key Laboratory for Crop Germplasm Resources of Ministry of Education/Key Laboratory for Crop Germplasm Resources of Hebei Province, Hebei Agricultural University;

关键词: Gossypium hirsutum L.;    Fibre quality;    Morphological traits;    Genetic diversity;    Double-thirty;   

DOI  :  10.1186/s42397-019-0041-2

来源: DOAJ

【 摘 要 】

Abstract Background Evaluating phenotypic traits is very important for the selection of elite lines in Gossypium hirsutum L. Cotton breeders are interested in using diverse genotypes in hybridization that can segregate for traits of interested with the possibility of selection and genetic gain. Information on phenotypic and molecular diversity helps the breeders for parental selection. Methods In this study, 719 global collections of G. hirsutum L. were evaluated for five fibre-related traits during two consecutive years in eight different environments. A series of phenotypic data for fibre quality traits were obtained and the elite accessions were further screened using principal component analysis and phylogenetic tree construction based on single nucleotide polymorphism markers. Results We found that fibre quality traits showed a wide range of variation among the G. hirsutum accessions over 2 years. In general, accessions from outside China tended to have higher fibre length (FL) and fibre strength (FS) than did Chinese accessions. Among different regional accessions in China, North/Northwest accessions tended to have the highest FL, FS and best fibre macronaire. By assessing five fibre quality traits over 2 years with genotypic data, 31 elite germplasms reaching double-thirty quality values (FL ≥ 30 mm and FS ≥ 30 cN·tex− 1) were selected. Conclusions This study provided a detailed phenotypic diversity description of a population representing a wide range of upland cotton germplasm. Our findings provide useful information about possible elite fibre quality parents for cotton breeding programs.

【 授权许可】

Unknown