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林业科学 ›› 2011, Vol. 47 ›› Issue (4): 57-62.doi: 10.11707/j.1001-7488.20110410

• 论文 • 上一篇    下一篇

鹅掌楸苗期生长杂种优势的SSR分析

王晓阳1,2, 李火根1   

  1. 1. 南京林业大学林木遗传和基因工程重点实验室 南京 210037;2. 中国热带农业科学院香料饮料研究所 万宁 571533
  • 收稿日期:2010-01-15 修回日期:2010-04-20 出版日期:2011-04-25 发布日期:2011-04-25
  • 通讯作者: 李火根

Possible Mechanism Analysis for Heterosis of Hybrid Liriodendron Based on Seedling Growth and SSR Markers

Wang Xiaoyang1,2, Li Huogen1   

  1. 1. Key Laboratory of Forestry Genetics and Gene Engineering, Nanjing Forestry University Nanjing 210037;2. Spice and Beverage Crops Research Institute, Chinese Academy of Tropical Agricultural Science Wanning 571533
  • Received:2010-01-15 Revised:2010-04-20 Online:2011-04-25 Published:2011-04-25

摘要:

以12个鹅掌楸种间杂交组合子代及其亲本自由授粉子代为材料,在分析各子代苗期生长性状及杂种优势表现的基础上,利用SSR分子标记检测鹅掌楸交配亲本的遗传距离以及杂交组合子代的杂合度,进而分析鹅掌楸苗期生长性状杂种优势与亲本遗传距离及子代杂合度之间的相关性。结果表明: 鹅掌楸亲本遗传距离及子代杂合度与苗期生长杂种优势之间的相关性均未达显著水平,表明二者可能并非鹅掌楸杂种优势形成的主要原因。

关键词: 鹅掌楸, 杂种优势, SSR, 遗传距离, 杂合度

Abstract:

It is well known that there is an obvious heterosis occurred in interspecific hybrid of Liriodendron, however its genetic basis is not clear. In this paper, the heterosis of growth was estimated for 12 interspecific crossing combinations, and their heterozygosities and parentage genetic distances were also evaluated by using SSR markers. It was found that there were no significant correlations between heterosis and genetic distance and heterozygosity, which indicated there would be other factors relating to the heterosis of hybrid Liriodendron besides the genetic distance and heterozygosity.

Key words: Liriodendron, heterosis, SSR, genetic distance, heterozygosity

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