Preliminary Selection of Half-sib Family in Betula costata Based on Seed Vigor and Sapling Growth
Betula costata is a valuable timber and ornamental tree species in northeast China.The seed vigor and growth traits of different half-sib families were systematically compared,and a reference for selecting Betula costata superior family would be provided.Variance analysis and correlation analysis on thousand seed weight,germination rate,germination energy,germination index,sapling height,and base diameter were conducted by using 30 Betula costata half-sib families as materials,and principal component analysis was used to evaluate comprehensively the tested families.The results showed that there was an extremely significant difference in thousand seed weight,germination rate,germination energy,germination index,height,and base diameter among families,respectively.The family heritability of each trait was higher than 0.88.There was an extremely significant positive correlation between different traits.Based on the result of principal component analysis,JL6,JL18,JL22,JL7,JL25,and JL4 were selected as the superior families.The average of the thousand seed weight,germination rate,germination energy,germination index,sapling height,and base diameter of superior families were 19.62%,15.97%,15.31%,26.81%,32.15%,and 14.49%higher than the total average,respectively.The genetic gains of thousand seed weight,germination rate,germination energy,germination index,sapling height,and base diameter of superior families were 19.46%,22.67%,22.79%,24.07%,32.07%,and 14.44%,respectively.The mother tree of the above superior families could be preliminarily determined as the preferred mother tree for Betula costata seed collection.
万方数据
维普
