[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.
关键词
樟子松/优良家系/子代测定林/生长性状/遗传增益
Key words
Pinus sylvestris var.mongolica/excellent lineage/progeny forest/growth traits/genetic gain
维普
万方数据