广西赤苍藤种质资源调查与表型多样性评价
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广西壮族自治区农业科学院生物技术研究所

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国家现代农业产业技术体系(CARS-21);广西重点研发计划(桂科AB21220042);广西特色作物试验站(桂TS2022002)


Germplasm Resources Investigation and Phenotypic Diversity Evaluation of Erythropalum scandens in Guangxi
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Biotechnology Research Institute,Guangxi Academy of Agricultural Science

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Earmarked fund for CARS(CARS-21);The Key Research and Development Project in Guangxi(Guike AB21220042); Guangxi characteristic crop experimental station project (Gui TS2022002)

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    摘要:

    通过变异系数、相关性分析、主成分分析和聚类分析等方法,对142份赤苍藤种质进行表型多样性分析及综合评价,为广西赤苍藤的品种选育奠定基础。调查发现崇左市、百色市具有较多的赤苍藤野生种质资源,其次为南宁市,主要分布在石灰岩石山、山坡、山地、疏林、密林等环境,海拔在140~1001 m之间。表型统计结果显示142份赤苍藤种质的11个表型性状变异系数介于2.76%~18.75%,说明广西赤苍藤种质资源遗传差异较大。相关性分析表明,叶长与叶宽、第二级枝条节间长、果实纵径、叶厚有显著相关性,叶宽与叶厚、果实纵径有显著相关性,叶柄长与第二级枝条粗、第二级枝条节间长有显著相关性,海拔高度与叶厚呈显著正相关,而与叶长、叶宽和第二级枝条节间长呈显著负相关。聚类分析结果显示在欧氏距离为4.5时,142份赤苍藤种质材料可分为4类,第Ⅰ、Ⅱ、Ⅲ和Ⅳ分别包含了49、54、27和12份种质材料。主成分分析表明,5个主成分的累计贡献率达68.25%,主成分1和主成分2主要反映叶片和枝条相关指标,而主成分3、主成分4和主成分5主要反映果实相关指标。综合评价结果排名前十的种质均来源于崇左市,其中包含了5份人工栽培种质和5份野生种质,可为赤苍藤新品种选育及品种改良提供优良亲本。

    Abstract:

    The phenotypic diversity analysis and comprehensive evaluation of 142 germplasms of Erythropalum scandens were carried out by means of coefficient of variation, correlation analysis, principal component analysis and cluster analysis, which laid a foundation for the breeding of E. scandens in Guangxi. The survey found that Chongzuo City and Baise City had more wild germplasm resources, followed by Nanning City, and a small number of wild germplasm resources of E. scandens were found in Hechi City, Wuzhou City, Yulin City, Fangchenggang City, Liuzhou City, Beiliu City, Pingguo City and Pingxiang City. The wild germplasm mainly distributed in limestone hills, slopes, mountains, sparse forests, dense forests, with an altitude of 140-1001 m. The statistical results showed that the coefficient of variation of 11 phenotypic traits was between 2.76% and 18.75% of 142 germplasms, indicating that the genetic difference of germplasm resources in Guangxi was large. Correlation analysis showed that leaf length was significantly correlated with leaf width, length of the second branch internode, main stem diameter, fruit longitudinal diameter and leaf thickness. Leaf width was significantly correlated with leaf thickness and fruit longitudinal diameter. Petiole length was significantly correlated with the second branch diameter, the second branch internode length and main stem diameter. Altitude was significantly positively correlated with leaf thickness, but significantly negatively correlated with leaf length, leaf width and second-order branch internode length. The results of cluster analysis showed that 142 germplasm materials could be divided into 4 categories when the Euclidean distance was 4.5, The first, second, third and fourth categories contained 49, 54, 27 and 12 germplasms, respectively. Principal component analysis showed that the cumulative contribution rate of the five principal components was 68.25%. Principal component 1 and principal component 2 mainly reflected leaf and branch related indicators, while principal component 3, principal component 4 and principal component 5 mainly reflected fruit related indicators. The comprehensive evaluation results showed that the top ten germplasms were all from Chongzuo City, including 5 cultivated germplasms and 5 wild germplasms, which could provide excellent parents for the breeding and improvement of new varieties of E. scandens.

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  • 收稿日期:2024-08-01
  • 最后修改日期:2024-10-23
  • 录用日期:2024-10-24
  • 在线发布日期: 2024-11-20
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