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园艺学报 ›› 2012, Vol. 39 ›› Issue (10): 1913-1918.

• 果树 • 上一篇    下一篇

枇杷野生型与栽培型的cpDNATrnS-TrnG 及cpDNATrnQ-rps16 序列多态性的比较

王云生,林顺权   

  1. (华南农业大学园艺学院,广州 510642)
  • 出版日期:2012-10-25 发布日期:2012-10-25

A Comparative Study on the Polymorphism of Loci cpDNATrnS-TrnG and cpDNATrnQ-rps16 in Cultivated and Wild Loquats

 WANG  Yun-Sheng, LIN  Shun-Quan   

  1. (College of Horticulture,South China Agricultural University,Guangzhou 510642,China)
  • Online:2012-10-25 Published:2012-10-25

摘要: 为了从野生型驯化为栽培品种的角度了解枇杷(Eriobotrya japonica Lindl.)的遗传多样性,对55个来自世界各地有代表性的栽培品种及多份野生枇杷的cpDNATrnS-TrnG及cpDNATrnQ-rps16基因位点序列的核苷酸多态性进行了比较分析。结果显示:栽培枇杷群体在这两个基因位点不存在变异,而野生枇杷群体在cpDNATrnS-TrnG位点出现了两个替代变异及1个插入/缺失变异,在cpDNATrnQ-rps16位点出现了3个替代变异及两个插入/缺失变异,表明在从野生型驯化为栽培品种的过程中发生了严重的遗传瓶颈,导致了栽培枇杷群体的遗传基础狭窄。

关键词: 枇杷, 遗传多样性, 野生资源, 栽培品种

Abstract: In order to understand the genetic diversity of loquat(Eriobotrya japonica Lindl.) in view of domestication of wild loquat,the sequences of loci cpDNATrnS-TrnG and cpDNATrnQ-rps16 of 55 accessions cultivated and some wild loquats collected from different locations were analyzed and compared in this studies. No nucleotide polymorphism was found in cultivated population. However,one indel/insert and two substitutes appeared in the segment of cpDNATrnS-TrnG,and three mutants and two indel/inserts appeared in the segment of cpDNATrnQ-rps16 of wild populations. The results implied very low genetic diversity existed in cultivated population of loquat induced by the severe genetic bottleneck generated during the process of domestication of cultivated loquat.

Key words: loquat, genetic diversity, wild resource, cultivars

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