Scholarlink

<p><i>Cycas,</i> the only surviving genus of the Cycadaceae family, is globally threatened, with most species listed as endangered and threatened on the IUCN Red List (Calonje et al., 2025). Despite their ancient lineage, cycads have shown adaptability and resilience through multiple mass extinction events, making <i>Cycas</i> a crucial genus for studies. Cycads exhibit dioecious habits with separate male and female plants; however, due to morphological similarity, male and female plants could be differentiated only after reaching reproductive maturity, which is often attained after 10–12&#xa0;years. The study of sex chromosomes in <i>Cycas</i> revealed variation in the sex determination pattern in different species of <i>Cycas</i>, including homomorphic, heteromorphic with identical chromosomes except for a satellite, and heteromorphic with a larger X and a smaller Y chromosome. Dioecy is a conserved phenomenon in <i>Cycas</i> however apart from the XY system of sex determination the impact environment in sex determination (epigenetic) and sex reversal could not be denied. The evolutionary dynamics of sex chromosomes in <i>Cycas</i> could provide valuable insights into the forces driving differential patterns of sex chromosomes in <i>Cycas</i> and their role in shaping the survival of cycads over millions of years, also contributing to the strategic planning of conservation efforts in the genus <i>Cycas</i>.</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

Studies on Sex Chromosomes in the Genus Cycas (Cycadaceae)

  • 期刊论文

  • 发表日期：

    2026年4月15日

查看全文
  • Utkarsha Gupta,
  • Suresh Kumar,
  • Neeta Kushwaha,
  • Manju Srivastava,
  • Surochita Basu,
  • Madhusudhana Reddy Araveeti,
  • Sarita Srivastava

摘要

Cycas, the only surviving genus of the Cycadaceae family, is globally threatened, with most species listed as endangered and threatened on the IUCN Red List (Calonje et al., 2025). Despite their ancient lineage, cycads have shown adaptability and resilience through multiple mass extinction events, making Cycas a crucial genus for studies. Cycads exhibit dioecious habits with separate male and female plants; however, due to morphological similarity, male and female plants could be differentiated only after reaching reproductive maturity, which is often attained after 10–12 years. The study of sex chromosomes in Cycas revealed variation in the sex determination pattern in different species of Cycas, including homomorphic, heteromorphic with identical chromosomes except for a satellite, and heteromorphic with a larger X and a smaller Y chromosome. Dioecy is a conserved phenomenon in Cycas however apart from the XY system of sex determination the impact environment in sex determination (epigenetic) and sex reversal could not be denied. The evolutionary dynamics of sex chromosomes in Cycas could provide valuable insights into the forces driving differential patterns of sex chromosomes in Cycas and their role in shaping the survival of cycads over millions of years, also contributing to the strategic planning of conservation efforts in the genus Cycas.