Acta Agriculturae Boreali-Sinica ›› 2023, Vol. 38 ›› Issue (S1): 26-33. doi: 10.7668/hbnxb.20194138

Special Issue: Cotton Biotechnology

• Crop Genetics & Breeding·Germplasm Resources·Biotechnology • Previous Articles     Next Articles

Genetic Diversity Analysis and Primary Core Germplasm Development of Upland Cotton Germplasm Resources

ZHANG Xi1, LIU Yi1, QIAN Yuyuan1, WANG Guang'en1, WANG Hanju2, JIAO Xiufen2, XIE Hui3, CUI Shufang1, LI Junlan1   

  1. 1 Institute of Cotton,Hebei Academy of Agriculture and Forestry Sciences,Key Laboratory of Cotton Biology and Genetic Breeding in Huanghuaihai Semiarid Area,Ministry of Agriculture and Rural Affairs,P.R.China,National Cotton Improvement Center Hebei Branch,Shijiazhuang 050051,China
    2 Quzhou Bureau of Agriculture and Rural Affairs,Handan 057250,China
    3 Hengshui Seed Management Station,Hengshui 053000,China
  • Received:2023-03-24 Published:2023-12-28

Abstract:

The aim of this study was to evaluate the genetic diversity of upland cotton germplasm resources and screen representative germplasm,so as to provide theoretical basis for scientific evaluation and efficient utilization of upland cotton germplasm resources.Based on the SNP markers of 367 upland cotton resources and the phenotypic data of 353 resources,genetic diversities were analyzed,phylogenetic tree and primary core germplasm were constructed,and effects of primary core germplasm construction were evaluated.The results showed that the polymorphism information content(PIC)of the original upland cotton population was 0.24,and the genetic diversity index of each phenotypic trait was close to 2.00,which were similar to the results of previous studies.The upland cotton germplasm could be divided into three groups based on SNP markers,and 73 genotypic primary core resources were constructed.The Nei's genetic diversity index,PIC and other genetic diversity indexes of primary core germplasm were higher than those of original germplasm.Based on the phenotypic data,the upland cotton germplasm could be divided into three groups,and the mean value of each trait showed the trend that the group Ⅰ was the smallest,the group Ⅱ was in the middle,and the group Ⅲ was the largest.Seventy phenotypic primary core resources were constructed.Compared with the original germplasm,the mean values of all traits were not significantly different,the range and genetic diversity index were similar to that of the original germplasm,and the coefficient of variation was higher than that of the original germplasm.Fifteen primary core resources constructed based on SNP markers overlapped with those constructed based on phenotypic data.Most of these resources were genotypic group Ⅱ and phenotypic group Ⅱ.These results showed that the genotypic genetic diversity of upland cotton germplasm resources was low,but the phenotypic variation was rich and the phenotypic genetic diversity was high.The genotypic and phenotypic primary core germplasm constructed in this study had a good representation of genetic diversity and could be used as a typical germplasm for preservation and utilization.

Key words: Upland cotton, Genetic diversity, Core germplasm, SNP marker, Phenotypic traits

Cite this article

ZHANG Xi, LIU Yi, QIAN Yuyuan, WANG Guang'en, WANG Hanju, JIAO Xiufen, XIE Hui, CUI Shufang, LI Junlan. Genetic Diversity Analysis and Primary Core Germplasm Development of Upland Cotton Germplasm Resources[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(S1): 26-33. doi: 10.7668/hbnxb.20194138.

share this article