有网脉和无网脉金线莲杂交及分子鉴定
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福州市科技计划(福建道地中药材金线莲品种创新与产业化KLI18008A)


Hybridization and Molecular Identification of Anoectochilus roxburghii with and without Leaf Veins
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    摘要:

    对源自福建武夷山道地金线莲种质资源‘武夷1号’有网脉和无网脉植株进行性状观察和药用成分分析,并以二者为亲本进行人工杂交,研究杂交亲和性及杂交后代性状分离规律,利用ISSR和CDDP分子标记对亲本和杂交后代进行鉴定,为福建道地金线莲种质资源进行品种改良提供依据。结果显示:(1)金线莲有网脉植株类黄酮和总多糖含量显著较高,分别为无网脉植株的1.2和1.3倍,但无网脉植株金线莲苷含量略高于有网脉植株。(2)杂交结果显示,金线莲父母本为相同网脉性状组合的杂交亲和性要高于网脉性状不同的组合;杂交后代有网脉、无网脉性状分离比例约为3∶1;推断有网脉为纯合基因型,无网脉为杂合基因型。(3)ISSR和CDDP分子标记联合应用能有效区分金线莲无网脉植株和有网脉植株,也可以用于鉴定杂交后代;聚类分析结果表明,有网脉与无网脉金线莲的遗传距离为0.04。研究结果表明福建道地金线莲不同品系间的药用成分含量差异较大,并支持有网脉金线莲与无网脉金线莲为不同品种(系)的观点。

    Abstract:

    Using Anoectochilus roxburghii plants with or without leaf veins from ‘Wuyi No. 1’ germplasm resource of Wuyi Mountain, Fujian Province as materials, we carried out trait observations and medicinal component analysis in this study. Artificial crossing was also carried out with these two kinds of plants as the parent. The pattern of hybrid progeny segregation was analyzed and the parents and hybrid progeny were identified by ISSR and CDDP molecular markers. Our studies provide the basis for cultivar improvement of the Fujian native A. roxburghii germplasm resources. The results showed that: (1) flavonoid and total polysaccharide contents in the plant with leaf veins were 1.2 times and 1.3 times as high as in the plant without leaf veins, respectively. However, the content of kinsenoside in the plant without leaf veins was slightly higher than the plant with leaf veins. (2) Hybridization results showed that the hybrid compatibility of the parent with the same leaf vein trait was higher than the parent with different leaf vein trait. The segregation ratio of with and without leaf veins hybrid progeny was about 3∶1. We infer that the genotype with leaf veins is homozygous and the genotype without leaf veins is heterozygous. (3) Plants with or without leaf veins can be effectively distinguished by combined application of ISSR and CDDP molecular markers, ISSR and CDDP markers can also be used to identify hybrid progeny. Cluster analysis showed the genetic distance of plants with and without leaf veins was 0.04. Our results indicate that there are significant differences in the contents of medicinal components among different strains of Fujian native A. roxburghii germplasm resource and support the view that A. roxburghii with and without leaf veins are different strains.

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任嘉欣,石 研,罗 怡,等.有网脉和无网脉金线莲杂交及分子鉴定[J].西北植物学报,2022,42(12):2021-2029

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  • 在线发布日期: 2023-01-15
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