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林木子代家系的多点试验是研究其适应性及稳定性的重要环节。以6个白桦Betula platyphylla三倍体家系、4个二倍体家系为材料,分别在尚志、辉南、凌海、丹东等4个试验点营造子代测定林,对3年生树高和地径等性状进行多地点联合分析。结果表明:树高在各试验点均达到差异显著水平(P<0.01);地径仅在丹东、凌海试验点各家系达到显著水平(P<0.05)。尚志试验点最优三倍体家系为314和319;辉南试验点为318和320;凌海试验点为314,316和320;丹东试验点为316,318和319。采用生产力指数法及基因型分组法将参试家系分为3种类型,即高产非稳产型家系,包括202,314和320;低产稳产型家系,包括201,318和319;低产非稳产型家系,包括203,204和315。各试验点入选的优良家系分别属于高产非稳产型家系及低产稳产型家系。研究结果不仅为白桦三倍体家系的早期推广提供参考,而且也为高世代三倍体制种园的改建提供重要依据。
Multi-point test of forest tree pedigree is an important part to study its adaptability and stability. Six pedigree families of Betula platyphylla and four diploid pedigrees were used as materials to establish offspring measuring forest in 4 pilot sites of Shangzhi, Huinan, Linghai and Dandong, respectively. The 3-year tree height and diameter And other traits for joint analysis of multiple locations. The results showed that the tree height reached a significant level of difference (P <0.01) at all test sites, and the average ground diameter reached significant levels only in Dandong and Linghai experimental sites (P <0.05). The optimal triploid families at Shangzhi test sites were 314 and 319; Huinan test sites were 318 and 320; Linghai test sites were 314, 316 and 320; Dandong test sites were 316, 318 and 319, respectively. The pedigree families were divided into three types according to the method of productivity index and genotyping method, that is, high yield unstable families, including 202, 314 and 320; low and stable stable pedigrees, including 201, 318 and 319; low yield unstable families including 203, 204 and 315. The selected elite families at each experimental point belong to the high-yielding non-stable type family and the low-yielding stable family. The results not only provide reference for the early popularization of triploid birch family, but also provide an important basis for the reconstruction of high-generation triploid plantation.