红松半同胞家系生长性状变异分析与优良家系选择

贾庆彬; 刘庚; 赵佳丽; 李奎友; 孙文生

doi:10.12302/j.issn.1000-2006.202107040

贾庆彬, 刘庚, 赵佳丽, 李奎友, 孙文生

南京林业大学学报（自然科学版） ›› 2022, Vol. 46 ›› Issue (4) : 109-116.

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南京林业大学学报（自然科学版） ›› 2022, Vol. 46 ›› Issue (4) : 109-116. DOI: 10.12302/j.issn.1000-2006.202107040

研究论文

红松半同胞家系生长性状变异分析与优良家系选择

贾庆彬 ¹ ,
刘庚 ¹ ,
赵佳丽 ¹ ,
李奎友 ² ,
孙文生 ¹^,^*

作者信息 +

Variation analyses of growth traits in half-sib families of Korean pine and superior families selection

JIA Qingbin ¹ ,
LIU Geng ¹ ,
ZHAO Jiali ¹ ,
LI Kuiyou ² ,
SUN Wensheng ¹^,^*

Author information +

文章历史 +

摘要

【目的】分析红松(Pinus koraiensis)半同胞家系生长性状的遗传变异,选择优良家系,为红松高世代遗传改良提供材料。【方法】以吉林露水河国家红松良种基地内红松半同胞家系子代测定林为研究对象,对34个家系(包括对照1个)不同林龄(18、23、27 a)时期的生长性状进行家系间差异性比较、遗传参数估算、表型相关与遗传相关分析,综合各林龄阶段家系生长表现,以材积和育种值为主要指标进行优良家系选择。【结果】不同林龄时期,树高、胸径、材积的家系间差异均达到极显著水平。材积家系间差异主要受遗传效应影响,随林龄增长,作用逐渐加强。树高与胸径主要受遗传效应、遗传与环境互作效应共同影响,冠幅主要受环境效应影响。4个性状中,树高变异相对较小,材积变异较大。树高、胸径、材积受较强遗传控制,冠幅受中低遗传控制。林龄18~23 a时,树高、胸径、材积的家系遗传力呈下降趋势;林龄23~27 a时,遗传力变幅较小,表现趋于稳定。遗传进展变化趋势与遗传变异系数变化趋势一致,表现为树高、胸径、材积随林龄增长有所下降,林龄23 a后变幅缩小,基本稳定。生长性状间表型相关与遗传相关均表现为正相关关系。胸径与材积遗传相关达到极显著水平;树高与材积遗传相关随林龄增长逐渐减弱;冠幅与材积遗传相关随林龄增长逐渐加强。对参试家系3个林龄时期的生长表现进行综合分析与评价,筛选出优良家系2个,二者材积均值高出对照25.84%,高出参试家系平均值50.00%,高出表现较差的1331号家系114.29%。【结论】所选1302号、1046号优良家系材积现实增益显著,可为红松高世代育种提供基础材料,对今后红松生长性状的遗传改良以及大径材定向培育等具有积极意义。

Abstract

【Objective】 We analyzed the genetic variation of growth traits in half sib families of Korean pine (Pinus koraiensis), and select superior families to provide materials for genetic improvement of high generations of Korean pine. 【Method】 The progeny determination forest of half-sib families in Lushuihe National Forestry Improved Breeding Base was used for the experimental material. The differences in growth traits of 34 families, including one contrast, at different forest ages (18, 23 and 27-year old) were compared. The genetic parameters were estimated, and the phenotypic correlation and genetic correlation were analyzed. Based on the growth performance of families at each stand age, superior families were selected with volume and breeding value as the main indices. 【Result】 At different forest ages, the differences in height, diameter at breast height (DBH) and volume among families were highly significant. The difference in volume between families was mainly affected by genetic effects, and this effect was gradually strengthened with the growth of forest age. Height and DBH were mainly affected by genetic effects, genetic and environmental interaction effects, and crown width was mainly influenced by environmental effects. Among the four growth traits, there was less variations in the height and more variations in the volume. The height, DBH and volume were under strong genetic control, and the crown width was under medium and low genetic control. From 18 to 23 years of age, the heritability of height, DBH and volume showed a downward trend. From 23 to 27 years of age, the heritability changed slightly and tended to be stable. The variation trend for the selection response was consistent with that of the genetic variation coefficient, which showed that the selection response of height, DBH and volume decreased with the growth of forest age, and the variation range was stable after 23 years of age. The phenotypic correlation and genetic correlation among growth traits showed a positive correlation. The genetic correlation between the DBH and volume was highly significant. The genetic correlation between the height and volume decreased gradually with the increase in forest age. The genetic correlation between the crown width and volume gradually strengthened with forest age. Through the analysis and evaluation of the growth performance of all families in three forest age stages, two superior families were selected. The average volume of superior families was 25.84% higher than the contrast, 50.00% higher than the average value of all families, and 114.29% higher than the 1331 family which showed poor performance. 【Conclusion】 The actual gain in volume of superior families 1302 and 1046 was significant. The superior families can provide basic materials for high-generation breeding of Korean pine, and had positive significances for the genetic improvement of growth traits and directional cultivation of large-diameter wood of Korean pine in the future.

导出引用

贾庆彬, 刘庚, 赵佳丽, 等. 红松半同胞家系生长性状变异分析与优良家系选择[J]. 南京林业大学学报（自然科学版）. 2022, 46(4): 109-116 https://doi.org/10.12302/j.issn.1000-2006.202107040

JIA Qingbin, LIU Geng, ZHAO Jiali, et al. Variation analyses of growth traits in half-sib families of Korean pine and superior families selection[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2022, 46(4): 109-116 https://doi.org/10.12302/j.issn.1000-2006.202107040

中图分类号： S722.5

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