Scholarlink

<p>Ecuador, a center of origin for <i>G. barbadense</i> and <i>G. darwinii</i>, holds important cotton genetic resources which still lack a comprehensive evaluation. Then, the aim of this study was to preliminary assess the genetic diversity of the Ecuadorian cotton (<i>Gossypium</i> spp.) by using simple sequence repeat (SSR) markers. For this, the Genebank of the National Institute of Agricultural Research (INIAP) collected cotton diversity from Ecuadorian continental regions from 2018 to 2021 and included additional accessions conserved previously in the gene bank (from international sources and one from the Galapagos Islands). Of the 30 SSR markers used, 17 were polymorphic and remained for the analysis of the 123 accessions. An average of 7.7 alleles per locus was observed with PIC value of 0.639 and 0.686 for genetic diversity. Multivariate analyses such as cluster, STRUCTURE and PCoA were used for genetic assignment of the Ecuadorian cotton collection. Besides, AMOVA and the identification of duplicate genotypes complement the description. The most common <i>Gossypium</i> species in the three continental areas of Ecuador (Coastal, Andes and Amazonia) is <i>G. barbadense</i> (dooryard feral types), although, wild ferals of the species also exist in coastal areas. Few commercial <i>Gossypium hirsutum</i> materials were identified in the coastal region. These two species form different groups according to the multivariate analysis. On the other hand, the only <i>Gossypium</i> cf. <i>darwinii</i> accession stands in between these two groups in the vicinity of a feral wild cotton from the Puná Island and the coastal area. The AMOVA results suggest little exchange of cotton accessions among geographical continental regions, but there is a tendency of grouping accessions based on regional origin. A low number of duplicates was identified in the collection. This study assess, for the first time, the genetic diversity of native cotton present in Ecuador.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Survey of genetic diversity in the Ecuadorian national cotton (Gossypium spp. L.) collection assessed by simple sequence repeat (SSR) markers

  • 期刊论文

  • 发表日期：

    2026年2月17日

查看全文
  • Álvaro Monteros-Altamirano,
  • Johanna Buitrón-Bustamante,
  • Eduardo Morillo-Velasteguí,
  • Andrés Simbaña-Villarreal,
  • Ernesto Cañarte,
  • Nelly Paredes,
  • David Suarez

摘要

Ecuador, a center of origin for G. barbadense and G. darwinii, holds important cotton genetic resources which still lack a comprehensive evaluation. Then, the aim of this study was to preliminary assess the genetic diversity of the Ecuadorian cotton (Gossypium spp.) by using simple sequence repeat (SSR) markers. For this, the Genebank of the National Institute of Agricultural Research (INIAP) collected cotton diversity from Ecuadorian continental regions from 2018 to 2021 and included additional accessions conserved previously in the gene bank (from international sources and one from the Galapagos Islands). Of the 30 SSR markers used, 17 were polymorphic and remained for the analysis of the 123 accessions. An average of 7.7 alleles per locus was observed with PIC value of 0.639 and 0.686 for genetic diversity. Multivariate analyses such as cluster, STRUCTURE and PCoA were used for genetic assignment of the Ecuadorian cotton collection. Besides, AMOVA and the identification of duplicate genotypes complement the description. The most common Gossypium species in the three continental areas of Ecuador (Coastal, Andes and Amazonia) is G. barbadense (dooryard feral types), although, wild ferals of the species also exist in coastal areas. Few commercial Gossypium hirsutum materials were identified in the coastal region. These two species form different groups according to the multivariate analysis. On the other hand, the only Gossypium cf. darwinii accession stands in between these two groups in the vicinity of a feral wild cotton from the Puná Island and the coastal area. The AMOVA results suggest little exchange of cotton accessions among geographical continental regions, but there is a tendency of grouping accessions based on regional origin. A low number of duplicates was identified in the collection. This study assess, for the first time, the genetic diversity of native cotton present in Ecuador.