东京黄檀种子形态和播种品质的产地差异
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国家林业公益性行业专项(201204301);广东省林业科技创新专项(2013KJCX004-01)


Variations in morphology and sowing quality of Dalbergia tonkinensis seeds from different provenances in Vietnam
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    【目的】研究东京黄檀 Dalbergia tonkinensis 种子形态和播种品质间的产地差异,以期初步选出优良种质,为进一步的遗传改良提供基础。【方法】以东京黄檀为研究对象,对引自越南的10个产地47个家系的种子开展形态测定和播种发芽试验。【结果】东京黄檀种子长、宽、厚的变异幅度分别为10.22~15.43、5.76~8.56、1.59~2.56 mm;千粒质量变幅为64.90~153.73 g;发芽率最高的是Gia Lai 产地,达72.6%,其次是 B?c Ninh 产地,为69.4%,最低的是 Hu? 产地,为30.0%。产地间种长、种宽、千粒质量、发芽势、发芽指数存在极显著差异,厚宽比、发芽率达到显著差异水平,以种厚和长宽比在产地间的差异为最小;产地内不同家系种长、种宽、种厚等性状的差异显著。产地间种子千粒质量变异远远高于产地内家系间的变异,前者种子千粒质量变异幅度为72.410~139.671 g,后者种子千粒质量变异幅度为76.77~118.11 g。发芽率与千粒质量及种子宽度呈极显著正相关,千粒质量、种长和种宽与海拔和日照时数呈极显著正相关。聚类分析结果显示,东京黄檀不同产地可划分为3个主产区。【结论】种子大小及比例是影响种子发芽健康至关重要的因素。东京黄檀种子产地可划分为3个区。

    Abstract:

    【Objective】 To investigate the variations in morphology and sowing quality of Dalbergia tonkinensis seeds, and provide a basis for elite germplasm selection and further genetic improvement.【Method】Morphology and germination of D. tonkinensis seeds of 47 families collected from 10 provenances in Vietnam were studied. 【Result】Seed length ranged from 10.22 mm to 15.43 mm, seed width ranged from 5.76 mm to 8.56 mm, seed thickness ranged from 1.59 mm to 2.56 mm and 1 000-seed mass ranged from 64.90 g to 153.73 g. The seeds from Gia Lai provenance had the highest germination rate of 72.6%, followed by those from B?c Ninh of 69.4% germination rate, and the seeds from Hu? had the lowest germination rate of 30.0%. Analysis of variance revealed that seed length, seed width, 1 000-seed mass, germination potential and germination index had highly significant differences (P<0.01) among provenances. Seed germination rate and seed thickness/width ratio had significant differences (P<0.05) among provenances. Seed thickness and seed length/width ratio had the lowest differences among provenances. There were also significant differences in seed length, seed width, and seed thickness among different families within individual provenances. The variability in 1 000-seed mass among provenances which ranged from 72.410 g to 139.671 g was much higher than the variability in 1 000-seed mass among families within individual provenances which ranged from 76.77 g to 118.11 g. Seed germination rate had highly significant positive correlation with 1 000-seed mass and seed width. Seed length, seed width and 1 000-seed mass had highly significant positive correlation with altitude and hours of sunshine. Cluster analysis indicated that the production areas of D. tonkinensis could be divided into three major regions.【Conclusion】Seed size and seed proportion are the key factors affecting seed germination. Three major production regions of D. tonkinensis can be divided in Vietnam.

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麻永红,杨曾奖,徐大平,刘小金,张宁南.东京黄檀种子形态和播种品质的产地差异[J].华南农业大学学报,2016,37(3):107-114

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  • 收稿日期:2015-09-11
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  • 在线发布日期: 2016-05-05