Progeny evaluation and early selection of half-sib families of Chinese fir in Gannan
[Purpose]The performance and variation of growth traits of half-sib progeny of Chinese fir grown in Chinese fir seed or-chard in Gannan area were compared to select early excellent family,so as to provide reference for local Chinese fir seed breeding and promotion.[Method]A half-sib progeny forest of Chinese fir,cultivated in Jiangkeng working area of Senyuan Science and Technology Seedling Farm,Ganzhou City,Jiangxi Province for 6-year-old,were established to compare the growth traits[height,diameter at beast height(DBH)and volume]of 36 half-sib families,comprising cuttings(CK1),1st generation mixed lines(CK2)and 3rd-generation mixed lines(CK3),based on which families with excellent early growth traits were selected.[Result]The height,DBH and volume of 6-year-old Chinese fir progeny were significantly different among families.The mean values were 5.92 m,8.06 cm,0.018 2 m3,the phenotypic variation coefficients were 14.70%,18.73%,52.75%,respectively,the coefficient of genetic variation was 18.96%,25.32%,65.01%,and the heritability was 0.454 7,0.509 6,0.392 5,respectively.There were significant genetic differences among the growth traits.According to the tree height and DBH above 5%of the average,7 families(No.13,47,57,59,100,103,176)were selected.The highest genetic gains of tree height,DBH and volume per tree were No.103,59 and 13,with the genetic gains of 5.22%,7.97%and 16.17%,respectively.[Conclusion]Family No.13,47,57,59,100,103 and 176 were recommended to be early excellent families,with emphasis on family No.103,59 and 13 in the follow-up popularization and application in Gannan area.
Chinese firhalf-sib familyprogeny estimationearly selection
国家科技期刊平台
NSTL
万方数据
