华山松混合授粉子代测定效果分析

Analysis on effects of pollycross filial generation for Pinus armandii Franch

对威宁华山松良种基地的混合授粉子代林的调查结果表明 :约有 50 %的家系树高大于当地生产种 ,2 /3的家系地径大于生产种。树高和地径的遗传力都很高 ,分别为 92 .7%和 76.69% ,遗传增益达到 65.82 %和 2 6.4 4 %。家系遗传力比单株遗传力高 ,树高遗传力比地径高。家系筛选以树高为主 ,有 8个家系入选 ,入选率为 2 4 .2 4 %。将入选的优良家系营建高世代种子园 。

The investigation result of pollycross test for filial generation in Weining elite base tells that:the height of 50% families higher than native species;the diameter at the lowest stem of two thirds families wider than production species.the inheritance of height and diameter at the lowest stem are good,they are 92.7% and 76.69%;profit of inheritance are 65.8%and 26.44%.inheritance of families is higher than single;inhertance of height higher than diameter at the lowest stem;height as the main standard for selection of families,there are 8 families selected,selection rating is 24.24%.the higher benefit of inheritance will be gotten by construction orchard with the selected and elite families