Collection of Torreya grandis germplasm and analysis of seeds’ physico-chemical characteristics
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摘要: 为了解重要干果、油料树种榧树Torreya grandis种内变异情况,为进一步选育种提供基础,在榧树产区通过农户访谈掌握当地榧树种质变异的基础上,收集了110个实生单株种质,并测定了种蒲与种核纵横径、质量等物理性状,测定了影响种子口感的蛋白质及脂肪,分析了种子物理性状间的相关性。结果表明,各榧树种质种子物理性状上存在着较大的差异,且在化学成分上也存在差异,有3个单株种质的脂肪质量分数高于香榧Torreya grandis Merrillii,9个单株种质的蛋白质接近或高于香榧;种形指数与核形指数呈极显著相关,种蒲质量或种核质量与种蒲或种核的纵横径呈极显著正相关,种核的大小随种形大小变化而变化,种子形状尖长一般质量较小,种子外形粗短则质量越大。本研究的开展加深了对榧树自然群体的了解,发现其中部分种质具有栽培推广的潜力,有助于打破香榧栽培千年一种的局面,同时说明对具有千年栽培历史的榧树,采用野外实际调查及农户访谈等方法进行选育是一种切实可行的方法。图2表4参10Abstract: In order to reveal intra-species variations in Torreya grandis,an important oil species with dry fruit and to lay a foundation for further breeding,physico-chemical traits of 110 single tree-based germplasm resources collected based on interview with local farmer households to have an understanding of variations in germplasm,which included the length,diameter and weight of seeds with and without peel as well as protein and fat contents that affect the post-processing taste,and a correlation among the physical traits of seeds were analyzed. It was revealed that not only physical traits but also chemical ingredients varied greatly,with 3 individuals had a fat content and 9 ones had a protein content higher than or close to those of Torreya grandis Merrillii. The shape index between the seeds with and without peel was most significantly correlated,so was the correlation between the weight of seeds with or without peel and length as well as diameter of the seeds with or without peel. The size of seeds without peel varied with seed shape,viz. a long and pointed-shaped seed is generally small in weight. This study has made us have a better understanding of the natural Torreya grandis population and found that some germplasm resources have potential for further cultivation and extension,which would break the phenomenon that only Torreya grandisMerrillii is under cultivation for more than one thousand years. In addition,it is revealed that for such tree species as Torreya grandis that has been in cultivation for more than 1 000 years,field investigation and interview with farmer households are a feasible means for selection and breeding.[Ch,2 fig. 4 tab. 10 ref.]
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Key words:
- cash forestry /
- Torreya grandis /
- nutritional ingredient /
- seed trait /
- germplasm
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链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2011.05.010

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