论文部分内容阅读
在湿地松种源、种间试验和湿地松种源试验基础上选择性引进了美国３个州种子园单亲子代１１１个，分别在江西省赣南、赣中、赣北进行多点多年份遗传测定，总面积４０ｈｍ２，试验论证了湿地松树木改良进行多点家系选择的重要性。在科学实验基础上，赣南赣中各选出１８个优良家系，赣北选出２２个优良家系，平均遗传增益树高１１．９４％～２２．９７％，胸径１２．８３％～２８．４６％．全省选出优良单株１５０株，平均遗传增益树高２０％～２５．６０％，胸径１３．３０％～１５．８０％．并注意适应性选择，选出适合全省推广的广谱型优良家系９个，平均遗传增益树高胸径都在１０％以上。佛罗里达群体入选的优良家系占总入选的５６．０９％，说明该群体有广泛遗传基础，其增产潜力不可忽视。试验紧扣种源－群体－家系－单株，各层次的遗传差异、谱系关系较清楚，为今后江西省湿地松无亲缘关系优良家系间组配、控制授粉、多系测交、轮回选择、累加增益等高世代育种奠定理论、物质基础，符合当今世界多群体育种策略。
Based on the provenance of Pinus elliottii, interspecific experiment and provenance test of Pinus elliottii, 111 single seedlings from seed orchard of three states in the United States were selectively introduced in Gannan, Jiangxi and Jiangxi provinces in Jiangxi Province for multi-year and multi-year Genetic testing, the total area of 40hm2, the experiment demonstrated the importance of multi-point family selection of wetland pine improved. On the basis of scientific experiments, 18 excellent families were selected from Gannan, Jiangxi and 22 excellent families from northern Jiangxi. The average genetic gain was 11.94% -22.97% and the DBH was 12.83% -28. 46%. The province selected 150 excellent single plant, the average genetic gain tree height 20% ~ 25.60%, diameter 13.30% ~ 15.80%. And pay attention to adaptive selection, selected for the promotion of the province of 9 broad-spectrum elite families, the average genetic gain tree height breast diameter is above 10%. Florida families selected excellent families accounted for 56.09% of the total selected, indicating that the group has a wide range of genetic basis, its yield potential can not be ignored. The test closely linked to provenance - group - family - single plant, all levels of genetic differences, the relationship between pedigree more clearly, for the future Jiangxi Province Pinus elliottii good family arrangement, control pollination, Cumulative gain contour generation breeding laid the theory, material basis, in line with today’s world multi-species breeding strategy.