通过对抗蚜小麦品种正科1号×感蚜品种石4185的F2分离群体(495株)进行田间自然抗蚜调查,发现正科1号的抗蚜虫性状受显性单基因控制,鉴定出的这个显性抗蚜基因,暂定名为dnY。运用分离群体分组法(BSA)筛选到3个在抗感亲本间表现多态性...通过对抗蚜小麦品种正科1号×感蚜品种石4185的F2分离群体(495株)进行田间自然抗蚜调查,发现正科1号的抗蚜虫性状受显性单基因控制,鉴定出的这个显性抗蚜基因,暂定名为dnY。运用分离群体分组法(BSA)筛选到3个在抗感亲本间表现多态性的SSR标记(Xwms350、Xgwm437、Xgwm44);进一步将该基因定位于7DS上,距离该基因最近的标记为Xgwm44,遗传距离3.29 c M。同时讨论了基因dnY在小麦遗传改良以桨标记在抗蚜基因标记辅助选择中的作用。展开更多
Eleven microsatellite(SSR)markers were used to evaluate the genetic diversity and paternal parents of a seed orchard for Pinus massoniana planted at Wuyi Forest Farm,Fujian Province.The seed orchard contains 286 open_...Eleven microsatellite(SSR)markers were used to evaluate the genetic diversity and paternal parents of a seed orchard for Pinus massoniana planted at Wuyi Forest Farm,Fujian Province.The seed orchard contains 286 open_pollinated progenies derived from 129 candidate paternal clones and three maternal trees.Both the parental and progeny populations displayed high genetic diversity(h),with the estimated h values of 0.543 8 and 0.455 6,respectively.Paternal clones contributed differently to the progeny;only 5.3%～15.8% clones contributed 27.08%～48.96% pollen.More strikingly,one paternal clone contributed 10% and 17% pollen,respectively,to two maternal trees.It was found that the mating compatibility of a clone was not related to its origin.There was no significant influence of the physical location of a clone on the amount of paternal constituent and genetic diversity.The rate of contamination by pollen outside the seed orchard was as high as 9.44%.No selfing progeny was observed,suggesting that selfing depression will not be an issue in the seed orchard of P.massoniana.展开更多
文摘通过对抗蚜小麦品种正科1号×感蚜品种石4185的F2分离群体(495株)进行田间自然抗蚜调查,发现正科1号的抗蚜虫性状受显性单基因控制,鉴定出的这个显性抗蚜基因,暂定名为dnY。运用分离群体分组法(BSA)筛选到3个在抗感亲本间表现多态性的SSR标记(Xwms350、Xgwm437、Xgwm44);进一步将该基因定位于7DS上,距离该基因最近的标记为Xgwm44,遗传距离3.29 c M。同时讨论了基因dnY在小麦遗传改良以桨标记在抗蚜基因标记辅助选择中的作用。
文摘Eleven microsatellite(SSR)markers were used to evaluate the genetic diversity and paternal parents of a seed orchard for Pinus massoniana planted at Wuyi Forest Farm,Fujian Province.The seed orchard contains 286 open_pollinated progenies derived from 129 candidate paternal clones and three maternal trees.Both the parental and progeny populations displayed high genetic diversity(h),with the estimated h values of 0.543 8 and 0.455 6,respectively.Paternal clones contributed differently to the progeny;only 5.3%～15.8% clones contributed 27.08%～48.96% pollen.More strikingly,one paternal clone contributed 10% and 17% pollen,respectively,to two maternal trees.It was found that the mating compatibility of a clone was not related to its origin.There was no significant influence of the physical location of a clone on the amount of paternal constituent and genetic diversity.The rate of contamination by pollen outside the seed orchard was as high as 9.44%.No selfing progeny was observed,suggesting that selfing depression will not be an issue in the seed orchard of P.massoniana.
