引用本文:
【打印本页】   【下载PDF全文】   【查看/发表评论】  【下载PDF阅读器】  【关闭】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被：浏览 57次   下载 51次 本文二维码信息
码上扫一扫！
分享到： 微信 更多
字体:加大+|默认|缩小-
杉木良种家系选育
黄荣1, 王润辉1, 韦如萍1, 晏姝1, 伍观娣1, 吕宇宙2, 邓智曦3, 郑会全1
1.广东省林业科学研究院;2.韶关市曲江区国有小坑林场;3.乐昌市龙山林场
摘要:
为选育出生长、 材质皆优的杉木 Cunninghamia lanceolata 良种家系, 采用单交方式创制系列杂 交家系种子, 同时采集第二代改良种子园优异亲本半同胞家系、 广东特色资源 “乐昌油杉” 优异亲本半 同胞家系种子及对照小坑林场杉木 2. 5 代种子园良种混合种子, 共 27 个系号, 进行分系育苗用于营建子 代试验林。 开展多地点子代试验林遗传测定, 在 7. 5 a 生时测定分析其树高、 胸径、 单株材积等生长性状 变异规律, 综合生长稳定性表现、 多重比较分析和育种值排序结果, 开展优良家系选择, 并对优良家系 材性进行测定。 单地点和多地点联合方差分析结果显示, 品系间树高、 胸径、 单株材积等性状差异均达 显著至极显著水平 (P<0. 05 或 P<0. 01), 并以单株材积变幅最大, 其表型变异系数达 56. 09% ~ 83. 15%, 遗传变异系数为 11. 51% ~20. 98%。 在遗传控制方面, 树高、 胸径、 单株材积的家系遗传力均处较高水平 (0. 514~0. 677), 因此依据生长性状表现对参试家系进行选择可行且有效。 综合生长稳定性表现、 多重比 较和育种值排序结果发现, f8、 f9、 f29 家系生长和遗传品质表现优异且稳定, 可推选为稳定、 速生、 丰 产型良种家系, 并测定入选家系木材基本密度。 整体水平上, 家系 f8 和 f9 较其父本半同胞子代单株材积 平均现实增益分别为 40. 38%和 32. 17%, 较其母本分别为 16. 58%和 48. 20%。 与对照 f35 (2. 5 代种子园 种子) 相比, f8、 f9、 f29 家系单株材积现实增益多地点平均分别可达 21. 17%、 35. 86%、 30. 00%。 材质 方面, f8、 f9 家系木材基本密度较其父本半同胞子代现实增益分别达 4. 08%和 4. 26%, 较其母本分别为 2. 78%和 3. 39%, 而与对照相当。 鉴于入选的 f8、 f9、 f29 家系生长和材质表现优异, 于 2024 年 10 月被 广东省林木品种委员会审定为良种 “杉木杂交家系 GD2408”、 “杉木杂交家系 GD2409”、 “乐昌油杉家系 GD2429”, 予以在广东省范围内推广应用。
关键词:  杉木  子代测定  育种值  现实增益  家系选择
DOI：
分类号:
基金项目:广东省重点领域研发计划 (2020B020215001)。
Breeding of Elite Families of Cunninghamia lanceolata
Huang Rong1, Wang Runhui1, Wei Ruping1, Yan Shu1, Wu Guandi1, Lü Yuzhou2, Deng Zhixi3, ZHENG Huiquan1
1.Guangdong Academy of Forestry;2.Xiaokeng State Forest Farm in Qujiang District of Shaoguan;3.Longshan Forest Farm of Lechang
Abstract:
To select elite families of Cunninghamia lanceolata with superior growth and wood properties, this study was conducted by creating a series of full-sib families through controlled single-pair crosses. Seeds were also collected from half-sib families of superior parents in a second-generation improved seed orchard, half-sib families of the unique Guangdong resource "Lechang youshan" (C. lanceolata), and a mixed seed from a 2. 5-generation seed orchard in Xiaokeng State Forest Farm as the control. A total of 27 families were sown separately to establish progeny trial plantations. At 7. 5 years of age, the variation patterns in growth traits, including tree height (H), diameter at breast height (DBH), and individual tree volume (V), were measured and analyzed in multi-site progeny tests. Based on integrated assessments of growth stability performance, multiple comparisons, and breeding value rankings, superior families were selected, and their wood properties were determined. Individual and combined multi-site analyses of variance revealed significant to highly significant differences (P<0. 01 or P<0. 05) among families for H, DBH, and V. Individual tree volume exhibited the widest range of variation, with phenotypic and genetic variation coefficients of 56. 09%-83. 15% and 11. 51%-20. 98%, respectively. The family heritability estimates for H, DBH, and V were high, ranging from 0. 514 to 0. 677, indicating that selection based on these growth traits is feasible and effective. Families f8, f9, and f29 were identified as stable, fast-growing, and high-yielding elite families through comprehensive evaluation, and the wood basic density (WBD) of the selected families was measured. Overall, the realized gains in V for f8 and f9 compared to their paternal and maternal half - sib families were 40. 38% and 32. 17%, and 16. 58% and 48. 20%, respectively. The multi-site average realized gains in V for f8, f9, and f29 reached 21. 17%, 35. 86%, and 30. 00%, respectively, compared to the control ( f35). For WBD, the realized gains for f8 and f9 compared to their paternal and maternal half-sib families were 4. 08% and 4. 26%, and 2. 78% and 3. 39%, respectively, while their WBD was comparable to the control. Given their outstanding growth and wood properties, f8, f9, and f29 were officially approved as elite varieties " C. lanceolata GD2408", "C. lanceolata GD2409", "C. lanceolata GD2429" by the Guangdong Forest Tree Variety Approval Committee and in October 2024, for province-wide promotion.
Key words:  Cunninghamia lanceolata  progeny testing  breeding value  realized gain  family selection