云南松种源、林分和家系苗高生长的遗传变异研究

Study on Seedling Height Growth Hereditary Variation of Pinus yunnanensisProvenance, Stand and Family

在云南松种源区划的基础上，评选出１１个产地，２４个林分，３２８个自由授粉的优良家系，在昆明双龙、蒙自芷村、祥云清华洞３个测试点上进行３水平的联合栽培测定，从幼苗的生长量表明，云南松的变异是丰富的，每一个选择层次上都可获得一定的遗传增益。它们的增益是：种源３０％～１１０％，林分１１０％～１１４％，家系１６２％～１９５６％。在云南松的遗传改良中，应有效地利用每一选择层次上的增益。

Based on regionalization of Pinus yunnanensis provenance, 328 Pinus yunnanensis open pollination families which belong to 24 stands and 11 provenances have been chosen as elite families. Cultivation and measurement tests on these 328 elite Pinus yunnanensis families have been done in Kunming,Mengzi, Xiangyun.The increment of seedling indicated the abundant of Pinus yunnanensis variation, the genetic gain of 30%～110%,110%～114% and 162%～1956% can be gained from provenance, stand and family respectively.To improve hereditary character of Pinus yunnanensis,the genetic gain of provenance,stand and family should be utilized respectively or systematically.