北京林业大学学报2016，Vol.38Issue(7)：1-8,8.DOI:10.13332/j.1000-1522.20160148
新一轮毛白杨遗传改良策略的思考和实践
Thinking and practices for strategy on a new round genetic improvement of ;Populus tomentosa
摘要
Abstract
In this paper, in view of the significant effects of social and economic changes on poplar demands, a new round of genetic improvement strategy for Populus tomentosa was proposed based on analyzing the current situation and problems in combination with thinking and practices on variety breeding. It is necessary to design appropriate breeding objectives for different cultivation areas and application requirements, especially to select male varieties with fast-growth, high-quality and high resistance for timber forest and landscape, as well as the varieties exhibiting strong resistances to cold, drought, high temperature and water. According to the climatic regionalization and genetic differentiation of the natural populations, it should not only enrich the existing gene pool in the south distribution area ( Guanxian County, Shandong Province) , but also establish a new one in the north distribution area. Thus effective sub-regional preservation and utilization of P. tomentosa genetic resources would be realized. To solve the problem that it is still not taking full advantage of maternal effect in P. tomentosa breeding, screening out female parents with good fertility and high general combining ability though the analysis of half-sib progenies in the gene pool, and identifying the male parents for the superior individuals using molecular markers should be conducted. Furthermore, building a parents group that is suitable to different breeding objectives though the comprehensive assessment on main traits and genetic diversity to produce new varieties of P. tomentosa allotriploid using the gametes chromosome doubling technique is feasible. Given the complex grafting technology, high-cost, and easy aging of the seedlings for P. tomentosa breeding, exploiting the rejuvenation of tissue culture plantlets and suckers, vessel and field hard-wood cutting will be a good way to fulfill low-cost, effective and quickly large-scale propagation for P. tomentosa.关键词
毛白杨/育种目标/基因资源/分子标记/育种亲本/硬枝扦插Key words
Populus tomentosa/breeding objective/genetic resources/molecular markers/breeding parents/hard-wood cutting分类
农业科技引用本文复制引用
康向阳..新一轮毛白杨遗传改良策略的思考和实践[J].北京林业大学学报,2016,38(7):1-8,8.基金项目
“十二五”国家科技支撑计划课题(2012BAD01B0302)、北京市共建项目专项(2016BLREEE00)。 （2012BAD01B0302）
