水曲柳种子园半同胞子代遗传测定及优良家系选择

Generation of Genetic Determination of Fraxinus mandshurica Seed Orchard of Half Sib and Superior Family Selection

水曲柳种子园10年生半同胞子代家系树高、胸径和材积之间差异极显著;在参试的15个家系中树高有13个超过对照,生长量最大的是对照的1.15倍。胸径均超过对照,生长量最大的家系是对照的1.41倍。材积均超过对照,生长量最大的家系是对照的2.40倍;树高、胸径、材积家系遗传力分别是0.11、0.40、0.20,以材积显著大于对照为主要依据,参考树高、胸径两性状的表现,综合评选出7、4、9号3个优良家系,分别比对照,树高提高12.4%~14.8%,胸径提高32.7%~41.1%,材积提高120%~140%。7号家系各项指标均排在第一位,为最优家系;从15个家系中选出1个、2个、3个优良家系,其实生后代10年生时,树高能获得0.7%~0.9%的遗传增益,胸径能获得5%~7%的遗传增益,材积能获得6%~8%的遗传增益。

Fraxinus mandshurica seed orchard of 10 years old half sib progeny family difference between tree height,DBH and volume significantly;in the 15 families tested in tree height 13 families than the control,the tree height growth of family was the 1.15 largest times of the control.Diameter were more than the control,the largest family of DBH growth was 1.41 times of the control.Volume than the control,the volume increment the largest family was 2.40 times that of the control;tree height,DBH,volume family heritabilities were 0.11,0.40,0.20,and volume was significantly higher than that of control as the main basis of tree height,DBH,the reference relationship performance,comprehensive evaluation 7,4,9,three superior families,respectively,to improve the 12.4% ~ 14.8% tree height,DBH increased 32.7% ~ 41.1%,volume 120% ~ 140%.7 pedigrees indicators were ranked first,was the best family;chose 1,2,3 superior families from 15 families,in fact,progeny of 10 year old trees,genetic gain high energy 0.7% ~ 0.9%,genetic gain of DBH could obtain 5% ~ 7%,genetic volume can be obtained 6% ~ 8% gain.