CAJ | 학술논문

以黑龙江省林口县青山实验林场17年生杂种落叶松自由授粉家系子代测定林为对象,测定其树高、胸径、材积与基本密度,估算各性状的变异系数、相关系数、遗传力及遗传增益,以筛选生长和材质兼优的家系.结果表明:树高、胸径和材积都存在较大变异,变异系数分别为13.3%、22.5%和49.0%,基本密度变异系数为9.1%;树高、胸径、材积和基本密度4个性状家系间都存在显著差异,家系遗传力分别为94.2%、92.1%、92.7%和30.8%,生长性状受较强的遗传控制,基本密度遗传力稍低;树高、胸径、材积与基本密度间的遗传相关系数分别为-0.093、-0.140、-0.159,呈微弱负相关,但相关不显著,可以进行独立选择.通过对10个家系的生长性状分析,选出了日3×兴2和兴7×日77-2生长性状优良的2个家系,在20%的入选率下,树高、胸径、材积其遗传增益分别为9.4%、17.3%、42.3%.基本密度较大的家系是兴7×日77-2,在10%的入选率下,家系遗传增益为3.3%.综合生长和密度性状,确定兴7×日77-2家系为优良家系.家系兴7×日77-2高出对照均值:树高15.1%、胸径23.1%、材积49.5%、基本密度4.1%;高出家系均值:树高5.4%、胸径5.0%、材积16.6%、木材密度4.4%.
이흑룡강성림구현청산실험림장17년생잡충락협송자유수분가계자대측정림위대상,측정기수고、흉경、재적여기본밀도,고산각성상적변이계수、상관계수、유전력급유전증익,이사선생장화재질겸우적가계.결과표명:수고、흉경화재적도존재교대변이,변이계수분별위13.3%、22.5%화49.0%,기본밀도변이계수위9.1%;수고、흉경、재적화기본밀도4개성상가계간도존재현저차이,가계유전력분별위94.2%、92.1%、92.7%화30.8%,생장성상수교강적유전공제,기본밀도유전력초저;수고、흉경、재적여기본밀도간적유전상관계수분별위-0.093、-0.140、-0.159,정미약부상관,단상관불현저,가이진행독립선택.통과대10개가계적생장성상분석,선출료일3×흥2화흥7×일77-2생장성상우량적2개가계,재20%적입선솔하,수고、흉경、재적기유전증익분별위9.4%、17.3%、42.3%.기본밀도교대적가계시흥7×일77-2,재10%적입선솔하,가계유전증익위3.3%.종합생장화밀도성상,학정흥7×일77-2가계위우량가계.가계흥7×일77-2고출대조균치:수고15.1%、흉경23.1%、재적49.5%、기본밀도4.1%;고출가계균치:수고5.4%、흉경5.0%、재적16.6%、목재밀도4.4%.
A study was conducted to analyze tree height, diameter at breast height(DBH), volume, and basic density of ten families from 17 year old hybrid larch progeny testing forests in Linkou County, Heilongjiang Province. Superior families were selected in terms of the estimated coefficient of variation of all traits, correlation coefficients, heritability, and genetic gain. Results show that there are abundant variations in the above four characters between and within families, and coefficients of variation for tree height, DBH, and volume were 13.3%, 22.5%, and 49.0%, and that of the basic density was 9.1%. There are significant differences between these characters within families, and the family heritability for height, DBH, volume, and basic density were 97.0%, 96.0%, 92.7%, 30.8% respectively. Growth traits are strongly controlled by genetic factors and the basic density are weakly controlled. Genetic correlation coefficients between tree height, DBH, volume and basic density were -0.093, -0.140 and -0.159, therefore, these characters could be selected independently due to their weak negative correlations. Under the selection rate of 20%, two elite families, Japan 3×xing'an2 and xing'an7×Japan77 2, were screened out from 10 families according to the growth traits, and the genetic gains of tree height, DBH, and volume were 9.4%,17.3% and 42.3% respectively. Under the selection rate of 10%, the family xing'an7×Japan77 2 exhibited the highest basic density, with a genetic gain of 3.3%. Xing'an7×Japan77 2 was finally considered to be a superior family judged by both growth traits and basic density, whose height, diameter, volume, and basic density were 15.1%, 76.9%, 49.5%, and 4.1% higher than those of the control, and 5.4%, 5.0%, 55.5%, and 4.4% higher than those of the average values of families respectively.