Study on the Selection of Pinus sylvestris var.mongolica Superior Families in the Daxing'an Mountains
[Objective]In order to enrich and improve the Pinus sylvestris var.mongolica excellent seed resource library and provide high-quality material for afforestation,the selection of excellent family lines was carried out for the offspring test forest constructed by 55 freely pollinated families in the 1.5 th generation seed orchard of Pinus sylvestris var.mongolica at the Technical Promotion Station of the Forest Management Department of Daxing'an Mountains Forestry Group Company.[Method]By investigating the height and diameter of the tree,calculating the volume of the tree,the difference analysis and varianceanalysis of each family were carried out,and the heritability and genetic gain were calculated.[Result]Five families with fast growth,large growth,good adaptability and small variation were selected at the three test sites with a selection rate of 10%.The DBH,tree height and volume of the 5 selected families at the three test sites exceeded 10 cm,7 m and 0.04 m3,respectively,and the genetic gain exceeded 15.75%,10.97%and 19.89%,respectively.[Conclusion]The"15","33","4","54"and"49"families have fast growth and good adaptability,making them excellent families suitable for afforestation in the the Daxing'an Mountains.
Pinus sylvestris var.mongolicaexcellent lineageprogeny forestgrowth traitsgenetic gain
万方数据
维普
