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关于林木育种策略的思考

康向阳

康向阳. 关于林木育种策略的思考[J]. 北京林业大学学报, 2019, 41(12): 15-22. doi: 10.12171/j.1000-1522.20190412
引用本文: 康向阳. 关于林木育种策略的思考[J]. 北京林业大学学报, 2019, 41(12): 15-22. doi: 10.12171/j.1000-1522.20190412
Kang Xiangyang. Thoughts on tree breeding strategies[J]. Journal of Beijing Forestry University, 2019, 41(12): 15-22. doi: 10.12171/j.1000-1522.20190412
Citation: Kang Xiangyang. Thoughts on tree breeding strategies[J]. Journal of Beijing Forestry University, 2019, 41(12): 15-22. doi: 10.12171/j.1000-1522.20190412

关于林木育种策略的思考

doi: 10.12171/j.1000-1522.20190412
基金项目: "十三五"国家重点研发计划课题(2016YFD0600403),北京市共建项目专项资助
详细信息
    作者简介:

    康向阳,教授,博士生导师。主要研究方向:林木细胞遗传与细胞工程育种。Email:kangxy@bjfu.edu.cn 地址:100083 北京市海淀区清华东路35号北京林业大学生物科学与技术学院

Thoughts on tree breeding strategies

  • 摘要: 我国人工林培育水平较低,其原因与林木育种领域投入的人力和财力不足、对育种策略的重视和执行力不够等原因有关,导致树种遗传改良最基本的育种循环难以维持,无法支撑树种遗传改良水平持续提升和人工林生产力的提高。本文综合分析国内外林木育种发展经验以及理论和技术成果,提出林木育种策略制定和执行需重视的几点问题:品种具有地域性和时间性以及经济属性,生态价值则属于种植改良品种所产生的附属效益,要制定科学、具体且有一定市场竞争优势的育种目标和育种周期;在此基础上强化树种基本群体、选择群体和育种群体建设与管理,采用科学的试验设计及分析方法保证准确而高效地开展遗传测定和选择,持续推进高轮次育种群体构建,并合理采用促进开花结实、相关选择或分子标记辅助选择等技术加快交配和选择进程,不断提高基本群体和选择群体遗传品质,甚至实现强优势远缘杂交品种的生产应用。对于能够无性繁殖的树种,可在一定的遗传改良阶段施加理化诱变、染色体加倍处理,进一步增加有益变异积累和利用。而对于已应用于生产却仍有不足的优良品种,可以采用遗传转化和基因编辑等分子育种进一步优化等。其中交配、遗传测定和选择是育种循环的核心以及进一步实施其他育种技术的基础,需要给予足够的重视和持续的坚持。

     

  • 图  1  依靠种子繁殖的两个树种的育种循环及其应用模式图

    树种A、B的育种循环一般各自独立运行。当两树种可杂交且有优势时,则每一世代杂交生产杂种。Breeding cycles of tree species A and B generally run independently. When the two tree species can be crossed and have heterosis, each generation produces hybrids.

    Figure  1.  Model diagram about breeding cycle of two tree species propagated by seeds and its application

    图  2  依靠无性繁殖的两个树种的育种循环及其应用模式图

    树种A、B的育种循环一般各自独立运行。当两树种可杂交且有优势时,则每一世代可通过杂交甚至结合理化诱变和染色体加倍、分子育种等选育优良无性系品种。Breeding cycles of tree species A and B generally run independently. When the two tree species can be crossed and have heterosis, each generation can breed excellent clones by hybridization or even combined with physical and chemical mutagenesis, chromosome doubling and molecular breeding.

    Figure  2.  Model diagram about breeding cycle of two tree species propagated by clonal propagation

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出版历程
  • 收稿日期:  2019-10-29
  • 修回日期:  2019-11-23
  • 网络出版日期:  2019-11-28
  • 刊出日期:  2019-12-01

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