高产脂湿地松松节油成分的遗传变异及综合选择
Genetic Variation and Comprehensive Selection of Turpentine Composition in High-yielding Slash Pine(Pinus elliottii)
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摘要: 通过测定湿地松松脂成分来估算松节油含量及其5种主要成分含量的遗传力和遗传相关,并以186株高产脂湿地松为研究对象,用Smith-Hazel综合选择指数法对高产脂湿地松松节油成分进行综合评价,以"核心-主群体"育种系统来选择高产优质脂用湿地松种子园的建园材料。结果表明:湿地松松节油含量及其组分的家系遗传力在0.34020.5713之间,单株遗传力在0.21120.4773之间,处于中等水平,有较高的遗传效应。有7个高含油率、高β-蒎烯的单株入选为核心育种群体,获得51.57%的松节油含量和97.89%的β-蒎烯含量的遗传增益,有86个单株入选为育种主群体,获得14.70%松节油含量、4.22% a-蒎烯、10.26%莰烯、22.99% β-蒎烯、17.69%双戊烯、13.49%月桂烯的现实增益,为我国优质脂松持续改良工作提供了优良材料和理论依据。Abstract: In this study, the heritability and genetic correlation of the contents of Pinus elliottii turpentine and its five components were estimated by measuring the resin composition. The Smith-Hazel comprehensive selection index was used for evaluating the turpentine composition of 186 high-yielding slash pine trees, and the high-yielding and good-quality P. elliottii plus trees were selected into the seed orchard by "core-master group" breeding system. The results showed that the family heritability and individual heritability of turpentine and its component content of P. elliottii were 0.3402-0.5713 and 0.2112-0.4773, respectively, indicating that the variation in turpentine and its component contents of P. elliottii were controlled genetically at medium level. 7 plus trees with high turpentine(the genetic gain was 51.57%) and high β-pinene(the genetic gain was 97.89%) were selected as the core-breeding population, and 86 plus trees were selected as the master-breeding population as the genetic gain of turpentine, α-pinene, camphene, β-pinene, dipentene, and myrcene were 14.70%, 4.22%, 10.26%, 22.99%, 17.69% and 13.49%. respectively.
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Key words:
- high-yielding slash pine
- / turpentine
- / multiple selection index
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