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<p>Cashew tree (<i>Anacardium occidentale</i> L.) ranks as the world’s third biggest nut production crop, with Ivory Coast as the leading producer. Currently, however, no improved variety is yet available, and the genomic resources for cashew breeding remain limited in this country for the local cultivar development. This study aimed at generating genomic resources from cashew trees grown in Ivory Coast and to expand existing cashew databases through the use of high-throughput molecular markers. A panel consisting of 106 cashew genotypes, identified by farmers as high-yielding and selected through participatory approaches across three agroecological zones, was analyzed using genotyping by sequencing (GBS) for the identification of polymorphic single nucleotide markers and for their use in genetic diversity studies. A total of 4963 and 1146 high-quality SNPs were identified and used to assess genetic diversity and population structure among the genotypes. The observed heterozygosity ranged from 0.05 to 0.38, and more than 58% of the SNPs showed polymorphic information content values between 0.25 and 0.38, while approximately 41% showed values below 0.25. Among the 106 genotypes, 44 were grouped into three distinct genetic clusters, independent of their geographical origin, while 55 genotypes were identified as hybrids. Among these, 6, 5, 5, and 20 accessions were found and confirmed as promising high-yielding after phenotypic analyses, some of which had loci identified as carrying private alleles. The findings have significant implications for both the cashew industry and the cashew research programs, as they could lead to proper dissemination of clonal materials with superior agronomic performance to industry and the integration of current genomics resources in selective breeding strategies.</p>

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SNP Diversity Among High Yielding Cashew (Anacardium occidentale L.) Trees Identified from Participatory Selection in Ivory Coast

  • 期刊论文

  • 发表日期：

    2026年3月16日

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  • Oro Flora Yépié,
  • Kouamé Kévin Koffi,
  • Amenan Jacky Konan,
  • Laurent Kouakou Kouakou,
  • Bourlaye Fofana,
  • Sélastique Doffou Akaffou,
  • Bi Irié Arsène Zoro

摘要

Cashew tree (Anacardium occidentale L.) ranks as the world’s third biggest nut production crop, with Ivory Coast as the leading producer. Currently, however, no improved variety is yet available, and the genomic resources for cashew breeding remain limited in this country for the local cultivar development. This study aimed at generating genomic resources from cashew trees grown in Ivory Coast and to expand existing cashew databases through the use of high-throughput molecular markers. A panel consisting of 106 cashew genotypes, identified by farmers as high-yielding and selected through participatory approaches across three agroecological zones, was analyzed using genotyping by sequencing (GBS) for the identification of polymorphic single nucleotide markers and for their use in genetic diversity studies. A total of 4963 and 1146 high-quality SNPs were identified and used to assess genetic diversity and population structure among the genotypes. The observed heterozygosity ranged from 0.05 to 0.38, and more than 58% of the SNPs showed polymorphic information content values between 0.25 and 0.38, while approximately 41% showed values below 0.25. Among the 106 genotypes, 44 were grouped into three distinct genetic clusters, independent of their geographical origin, while 55 genotypes were identified as hybrids. Among these, 6, 5, 5, and 20 accessions were found and confirmed as promising high-yielding after phenotypic analyses, some of which had loci identified as carrying private alleles. The findings have significant implications for both the cashew industry and the cashew research programs, as they could lead to proper dissemination of clonal materials with superior agronomic performance to industry and the integration of current genomics resources in selective breeding strategies.