摘要
樱桃为蔷薇科李属植物,属配子体自交不亲和系统.该属植物其S基因在雌蕊中特异表达的蛋白产物S-RNase,能够降解同一品种花粉管中的RNA,抑制自体花粉的受精作用.S等位基因的结构在基因水平上都具有3个外显子和2个内含子,在蛋白水平上有5个高度保守区.S等位基因在雌蕊和花粉中的表达具有时间和组织特异性,并且受植物生长发育时期的调控,这种特异性的自交不亲和反应由多态的S位点单模型决定.分子系统发育树显示甜樱桃S等位基因聚为三类.S等位基因在樱桃各品种间配置授粉树和亲本育种的选配方面起重要作用.
Cherry is Rosaceae,Prunus,belonging to gametophytic self-incompatibility system.The S gene products in styles are ribonuclease enzymes（S-RNase）,which can degrade the same species pollen tube RNA and reject the self pollen fertilization.The structures of S genes comprise 3 exons and 2 introns in gene levels,and consist of 5 highly conserved domains in protein levels.The expression of S genes in styles and pollens has the time and tissue specificity and modified by the periods of the plant growth and development. The specific gametophytic self-incompatibility reaction is determined by polymorphic S locus haplotype. The molecular phylogenetic tree shows that the S alleles of sweet cherries congregate into 3 groups. S alleles play important roles to match pollination cultivars and parent breeding selection among various species.
出处
《商丘师范学院学报》
CAS
2007年第6期7-12,共6页
Journal of Shangqiu Normal University
基金
国家863资助项目(2002A241122)
关键词
樱桃
S等位基因
分子系统发育
育种
cherry
S-alleles（S-genes）
molecular phylogenetic tree
breeding
作者简介
王关林（1943-）,男,浙江海盐人,辽宁师范大学教授,博士,博士生导师,主要从事植物基因工程研究.
