摘要
试验利用与产量QTL紧密连锁的分子标记对18个籼稻组合的亲本进行了遗传多样性分析,调查亲本的遗传距离与杂种优势表现间的关系。结果表明：（1）从79个标记中筛选出34个多态性标记,共检测到84个等位位点,平均每个标记检测到等位位点数2.5个。（2）聚类分析能够很好地将13个亲本区分为保持系和恢复系两大类群,并将亲缘关系相近的材料聚在一起。（3）亲本间遗传距离与杂种产量性状的中亲优势和超亲优势之间呈不显著正相关关系,相关系数为0.04~0.25。产量相关分子标记分析表明,试验所选的保持系间和恢复系间的遗传基础均较狭窄,但保持系与恢复系之间的遗传距离相对较远,从一定程度上反映出遗传距离与杂种优势间呈正相关。
Molecular markers tightly linked to the QTLs underlying yield were employed for studying genetic diversity among 13 parents of hybrid rice.The relationship between genetic distance（GD） and hybrid performance was analyzed.The results indicated that：（1） Selected from 79 markers,34 polymorphism markers produced 84 alleles.The average allele number was 2.5.（2） The cluster analysis classified 13 rice parents＇ lines into two groups（i.e.maintainer line group and restorer line group） and fitted better with the pedigree information.（3） The correlation between genetic distance and the heterosis of yield-related traits was positive but insignificant（0.04-0.25）.The genetic distance showed that the genetic basis of inter-maintainer lines and inter-restorer lines was rather narrow,while the genetic distance between maintainer and restorer lines were relatively distant,which would explain the positive relationship between genetic distance and heterosis.
出处
《浙江农业学报》
CSCD
北大核心
2010年第5期545-551,共7页
Acta Agriculturae Zhejiangensis
基金
国家863计划(2006AA10A102)
浙江省科技攻关重点项目(2006C22015)
关键词
分子标记
遗传距离
杂种优势
水稻
molecular marker
genetic distance
heterosis
rice
