基于早期产量的马尾松第1代种子园高产无性系选择

通过对福建省尤溪国有林场马尾松第1代种子园早期产量的研究,进行高产无性系选择。结果表明:即使在种子园初产期,大小年现象明显。以各年度无性系种子均重、出籽率大于建园无性系平均值为标准选择各年度高产无性系,无性系种子均重平均可提高59.94%,出籽率平均可提高41.53%,增产效果选择明显;但各年度入选无性系差别较大,存在产量不稳定型无性系。选择3 a均入选的9个无性系为高产稳产建园无性系,入选率为18.00%,其无性系种子均重可提高75.92%,出籽率可提高54.39%。

High-Yield Clone Selection of 1st Generation Pinus massoniana Seed Orchard Based on Early-Stage Production

High-yield clone selection was conducted based on early production study on Pinus massoniana yield of Youxi State-Owned Forest Farm 1st Generation Seed Orchard.The results showed that there was apparent biennial bearing phenomenon at the early production period.If it was the selection standard,that the seed average weight and the seed rate of each clone was more than that of all clones,the seed average weight of each clone could be increased by 59.94%,the seed rate could be increased by 41.53%,the increment effect selection was apparent;but the selected clone difference was big in different years,the unstable yield type of clone existed.So,based on the annual selection,9 clones were selected which were all selected in the 3 annual selections.,the selection rate was 18.00%.The seed average weight of each clone could be increased by 75.92% and the seed rate could be increased by 54.39%,finally.