广西金线莲形态多样性及优良类型选择

为筛选出广西金线莲Anoectochilus roxburghii(Wall.)Lindl.优良品种资源,对广西金线莲植株性状特征及无性繁殖后代的遗传稳定性进行观测,并测定有效活性成分(多糖和总黄酮)含量。结果表明,广西金线莲植株形态存在明显差异,主要表现在株型大小、叶形、叶上网脉特征、抗病性、授粉结实等方面。株型大小可分为2个株系;叶片形状可分为2种类型;叶上网脉特征可分为3种类型。根据株型和叶片特征可将广西金线莲划分为10个园艺类型,其中类型GXAR 01具有植株高大,叶形优美,适应性强,多糖、总黄酮含量高等特点,同时具有多代的遗传稳定性,被选为优良类型。广西金线莲优良类型GXAR 01可作为金线莲新品种培育的优质育种材料,也可在产业化生产中直接推广应用。

The Morphological Diversity and Superior Type Selection of Guangxi Anoectochilus roxburghii

In order to screen out the superior type of Guangxi Anoectochilus roxburghii, the traits of the plant species and the genetic stability of the asexual reproduction progeny were observed, and the content of effective active ingredients (polysaccharides and total flavonoids) was determined. The results showed that there were significant differences in the morphology of Guangxi Anoectochilus roxburghii, including plant size, leaf shape, leaf vein feature, disease resistance and pollinating fertility and so on. The plant type could be divided into two strains, the leaf shape could be divided into two types, and the leaf vein feature could be divided into three types. According to plant type and leaf features, Guangxi Anoectochilus roxburghii could be classified into 10 horticultural types. Among them, type GXAR 01 should be selected as superior types for it had the characteristics of tall plant, beautiful leaf shape, and strong adaptability, high content of polysaccharide and total flavonoids. At the same time, it had multigenerational genetic stability. The superior type GXAR 01 can be used as a high-quality breeding material for the cultivation of new varieties of Anoectochilus roxburghii, and can also be directly applied in industrial production.