Scholarlink

<p>Reticulate evolution is considered a widespread phenomenon in primates, as hybridization shaped evolutionary histories in all primate radiations, including Catarrhini. While genomic data suggest extensive ancient introgression among guenon lineages (tribe Cercopithecini), field and related genetic studies report extant hybridizations, along with fertility of guenon hybrids. By combining classical and molecular cytogenomics, we characterized chromosome organization for 12 guenon individuals, belonging to three species that associate in polyspecific groups: <i>Cercopithecus cephus</i>, <i>C. nictitans</i> and <i>C. pogonias</i>. Our results reveal multiple chromosomal heterozygosities in both the morphology of metaphase chromosomes and the molecular structure of centromeres, suggesting that chromosomal heterozygosity may be common in guenon genomes. Furthermore, we found similar chromosomal polymorphisms, involving similar chromosome and centromere variants, in distinct species. Our cytogenomic analysis also confirmed the hybrid origin of three individuals: two F1 hybrids between <i>C. cephus</i> and <i>C. nictitans</i>, and one backcross hybrid <i>C. nictitans x (C. cephus x C. nictitans)</i>. Together, our results provide further possible evidence for reticulate evolution and incomplete reproductive isolation, and identify guenons as a good system to untangle the evolutionary dynamics of primate centromeres. This study provides a foundation for future research regarding the influence of hybridization on chromosomal reorganization, reproductive isolation, and speciation.</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

Chromosomal Polymorphism in Cercopithecini: Cytogenomics Provides Evidence for Reticulate Evolution and Incomplete Reproductive Isolation

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年3月12日

查看全文
  • Lauriane Cacheux,
  • Michèle Gerbault-Seureau,
  • Peggy Motsch,
  • Bertrand Bed’Hom,
  • Florence Anne Richard

摘要

Reticulate evolution is considered a widespread phenomenon in primates, as hybridization shaped evolutionary histories in all primate radiations, including Catarrhini. While genomic data suggest extensive ancient introgression among guenon lineages (tribe Cercopithecini), field and related genetic studies report extant hybridizations, along with fertility of guenon hybrids. By combining classical and molecular cytogenomics, we characterized chromosome organization for 12 guenon individuals, belonging to three species that associate in polyspecific groups: Cercopithecus cephus, C. nictitans and C. pogonias. Our results reveal multiple chromosomal heterozygosities in both the morphology of metaphase chromosomes and the molecular structure of centromeres, suggesting that chromosomal heterozygosity may be common in guenon genomes. Furthermore, we found similar chromosomal polymorphisms, involving similar chromosome and centromere variants, in distinct species. Our cytogenomic analysis also confirmed the hybrid origin of three individuals: two F1 hybrids between C. cephus and C. nictitans, and one backcross hybrid C. nictitans x (C. cephus x C. nictitans). Together, our results provide further possible evidence for reticulate evolution and incomplete reproductive isolation, and identify guenons as a good system to untangle the evolutionary dynamics of primate centromeres. This study provides a foundation for future research regarding the influence of hybridization on chromosomal reorganization, reproductive isolation, and speciation.