“金冠×舞乐”苹果杂种后代几个形态指标的分析

Analysis of some morphological indexes in hybrid progeny from the cross of “Golden Delicious×Tuscan”

本文对“金冠×舞乐”的 2 19株三年生杂种实生苗的柱型性状等多种性状进行了调查和统计分析。结果表明 :后代柱型和非柱型性状植株呈 1∶1分离 ;节间长度、高粗比、叶形指数、萌芽数、成枝数都与柱型性状有相关性 ,可以作为柱型性状植株预先选择的指标 ;按节间长度 <1.6 7cm、高粗比 >0 .80、叶形指数 >1.6 4、萌芽数 >11、成枝数 <3.6来预选柱型性状植株准确率可达 80 %以上 ;成枝角度则不能作为柱型植株的预选指标。

219 3-year-old hybrid seedlings from the cross of “Golden delicious×Tuscan”were investigated and statistically analyzed for columnar growth type other characteristics. The results showed that the ratio of columnar and non-columnar growth type in progenies was 1∶1, the internode length, the height/diameter ratio, leaf index, the number of current-year sprouts and branches were correlatived with the columnar character istics. They could be used as indexes for prselection of the columnar seedlings in the nursery. Using parameters of the internode length less than 1.67cm, height/diameter ratio more than 0.80, leaf index more than 1.64, the number of current-year sprouts more than 11, and the number of current-year branches less than 3.6 as the creteria to select the columnar plant, the veracity was more than 80%. While branch angle could not be used as the preselecting index.