西藏野生油菜种质资源抗蚜性初步鉴定

Rape Tibetan wild Germplasm resources of the preliminary identification of anti-aphid

通过对采自西藏不同地区49份野生油菜种质资源材料进行的抗蚜性初步鉴定,结果显示:3份表现免疫,全部是芥菜型油菜,占9.52%;高抗22份,其中:芥菜型油菜16份,占芥菜型油菜的50%;白菜型油菜6份,占白菜型油菜的35.29%;中抗15份,其中:芥菜型油菜8份,占芥菜型油菜的25%;白菜型油菜7份,占白菜型油菜的41.18%;低抗4份,芥菜型和白菜型各2份,共占9.20%;感虫6份,芥菜型油菜4份,占芥菜型油菜的12.50%.说明在芥菜型和白菜型油菜中,芥菜型油菜的抗虫性和感虫性均较高.从经纬度来看,西藏野生油菜主要分布在北纬27°45′～31°42′,东经89°～92°,免疫品种主要在北纬7°45′～31°42′,并随着经纬度的增大免疫数量在减少,免疫的品种是野芥16、野芥22、野芥27.从海拔高度来看,免疫品种主要分布在3800 m以上;高抗品种在采集的所有海拔高度上均有分布,但随着海拔高度的升高,高抗品种数量在增加.说明随着海拔高度的增加油菜的抗蚜性明显升高,可以推断随着海拔的升高,害虫的适应性减弱,种群数量的发生与海拔有很大关系.

The collected from different parts of Tibet 49 wild rapeseed germplasm resources of the preliminary identification of the anti-aphid results showed that:three performance immunization,all Brassica juncea of 9.52%;high resistance to 22,of which mustard-Rape of 16,accounting for Brassica juncea 50%;six Brassica campestris,Brassica campestris of the 35.29%.Anti-15,Brassica juncea 8,or Brassica juncea 25%; 7 Brassica campestris,accounting for the Brassica campestris 41.18%,and low-4,2 each.Accounting for 9.20%;...