摘要
分析了家蚕茧质性状不同标记数的QTL定位效果 :6 92个标记和 5 4 2个标记的全茧量都是以基因互作效应为主 ,而茧层量、茧层率以及蛹体重性状既有加性也有显性和互作效应 ,且与全茧量、茧层量、茧层率和蛹体重之间的基本相关性相吻合 ;392个标记的分析结果与前两种类型有别 ,定位的总QTL组合数、QTL总数 ,以及效应显著的QTL数都表现最多 ,表明标记数减少反而定位出更多的QTL ,但 392个标记定位的QTL在连锁群的分布同全茧量与蛹体重、茧层量与茧层率之间的显著正相关不符合。分析认为 6 92个标记数的定位结果比较可靠。QTL的效应与贡献率之间的关系分析结果显示 :QTL效应值与QTL贡献率的相关系数达 0 95以上 ,表现为显著的正相关关系 ;但QTL的效应值和贡献率的大小与QTL效应的显著性并无直接关系。
This study compared different number of markers to effect efficiency of cocoon traits QTL location.In the same population of 692 and 542 markers,cocoon weight is mainly interaction of gene,but cocoon shell weight,cocoon shell ratio and pupae weight are direct additive,or direct dominance and interaction of gene,and the results accord to the truly relativity of them.However the results from 392 markers differ from that of 692 and 542 markers.The number of total QTL and significant QTL obtained from 392 is the largest.The results suggested that the number of QTL increased when the markers analyzed was decreased,but the QTL distribution in linkage groups can not correspond to significant positive relationships among cocoon weight,pupa weight and cocoon shell ratio in practice.The analysis results of the relationship between the effect of QTLs and the ratio of contribution of QTLs showed that the correlative coeffecient between the effective value of QTL and the contributive ratio of QTL was more than 0.95,which showed positive correlation at level of significance.However,there is no direct relationship between the significant level of the effective value of QTL and their contribution ratio.
出处
《蚕业科学》
CAS
CSCD
2004年第3期249-254,共6页
ACTA SERICOLOGICA SINICA
基金
国家 8 63项目 (编号 2 0 0 2AA2 110 11)
国家自然科学基金重点项目 (编号 3 0 170 719)。
