林业科学Issue(4)：32-38,7.DOI:10.11707/j.1001-7488.20140405
鹅掌楸属树种自交衰退的SSR分析
Analysis of Selfing Depression in Liriodendron with SSR Markers
摘要
Abstract
The existing Liriodendron has a small population size,and hence easily occurs selfing depression. In this study,we analyzed selfing depression of Liriodendron by taking 5 selfing progenies as experimental populations,4 intra-species progenies and 8 inter-species progenies as reference populations. The phenotypic traits such as survival rate and growth were used as evaluation index,combined with SSR molecular marker,to analyze the extent of selfing depression in Liriodendron. The aim of this study is to explore the underlying mechanism of selfing depression. The results showed that the selfing depression in Liriodendron chinense was obvious. By taking progenies of intra-species cross and inter-species cross as references,the degree of depression (δ value) of selfing progenies for DBH,height and survival rate were 0. 46, 0. 45;0. 32,0. 35; and 0. 25,0. 30 respectively. SSR test results showed that the homozygous progeny rate derived from different mating types of selfing,intra-species,inter-species was from high to low trend. Moreover,we also detected 2 candidate SSR loci that might relate to recessive lethal gene in Liriodendron.关键词
鹅掌楸属/自交衰退/SSR/隐性致死基因Key words
Liriodendron/selfing depression/SSR/recessive lethal gene分类
农业科技引用本文复制引用
潘文婷,姚俊修,李火根..鹅掌楸属树种自交衰退的SSR分析[J].林业科学,2014,(4):32-38,7.基金项目
国家自然科学基金项目(30771743) （30771743）
国家“十二五”科技支撑课题(2012BAD01B05) （2012BAD01B05）
江苏省高校自然科学重大项目(10KJA220017)。 （10KJA220017）
