【摘要】 本文以云南弥渡种子园27个家系的实生苗为材料,探讨了云南松优良家系和优良个体苗期选择的一些关键问题。结果表明:(1)不同家系间和同一家系不同个体间的高、径生长量存在极显著差异,不同家系间的抗病能力也存在明显差异。(2)通过综合选择,选出苗期生长较快且抗病能力较强的优良家系7个,入选率为25.93%。(3)采用标准差选择法,选出153株超级苗,入选率为19.29%。(4)不同家系间和同一家系不同个体间的苗高生长量差异明显大于地径,且两者呈极显著的正相关关系,因此生长性状的选择以苗高生长量为主、地径生长量为辅。更多还原

【Abstract】 Some key problems existed in seedling selection of superior families and excellent-individuals of Pinus yunnanensis were studied with the seedlings of 27 families in the seed orchard in Midu,Yunnan Province.The results showed that:(1) heights and basal diameter increments among different families and different individuals in the same family were significantly different,and disease resistance abilities of different families were also in great difference;(2) 7 superior families were selected with the characteristics of fast growing,and strong disease resistance ability from comprehensive selection with a selection ratio of 25.93%.(3) 153 superior seedlings were selected by standard variance selection way with a selection ratio of 19.29%.(4) difference in height growth was more than that in basal diameter among different families or different individuals within the same family.Moreover,height and basal diameter increment were in very significant positive correlation.Therefore height increment was taken as the maior growth trait,and then was basal diameter increment.更多还原