120份花生种质资源主要农艺与抗病性状的鉴定与评价
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1.南充市农业科学院中国农业科学院油料作物研究所;2.南充市农业科学院;3.中国农业科学院油料作物研究所

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国家花生产业技术体系(CARS-13);四川省苗子工程(2023JDRC0118);四川省农作物育种攻关计划(2021YFYZ0018);南充市基础研究平台(22JCYJPT0002);


Identification and Evaluation Agronomic Characters and Late Leaf Spot Resistance of 120 Peanut Germplasm Resources
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National Peanut Industry Technical System (CARS-13); Sichuan Miaozi Project, (2023JDRC0118); Sichuan Province Crop Breeding Program (2021YFYZ0018); Nanchong Basic Research Platform (22JCYJPT0002);

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    摘要:

    为满足花生在产量和晚斑病抗性上的育种需求,本研究挑选南充市农业科学院种质资源库中的120份花生种质资源进行鉴定和评价。对16个性状 进行表型调查,描述性统计结果显示,性状的变异系数在7.40%-47.65%之间,其中分枝数、单株饱果数、单株荚果数、单株生产力变异系数较大,荚果大小和籽粒大小相关性状变异系数较小;相关性分析结果显示,荚果数量和果重呈负相关,晚斑病等级与侧枝长和分枝数呈负相关。主成分分析将16个性状归为5个主成分,累计贡献率为85.013%。聚类分析将种质分为4个类群,第Ⅰ和Ⅱ类群为大果组,第Ⅲ和第Ⅳ类群为中小果组。基于5个主成分贡献率权重构建综合评分,筛选综合得分前10的种质资源,其中ICGV88938兼顾了高产和晚斑病抗性,于自然病圃筛选获得4份高抗晚斑病种质。本研究对120份种质的16个性状进行鉴定和评价,将为后续品种改良提供育种材料和理论基础。

    Abstract:

    To address the breeding needs of peanuts for higher yield and resistance to late leaf spot disease, 120 peanut germplasm resources were selected from the germplasm bank of Nanchong Academy of Agricultural Sciences for identification and evaluation. A phenotypic survey was conducted on 16 traits, and descriptive statistical results showed that the coefficients of variation of traits ranged from 7.40% to 47.65%. The variation coefficient of branch number, full pod number per plant, pod number per plant and yield per plant is larger, while the variation coefficient of the related traits of pod size and grain size is smaller. Correlation analysis indicated a negative correlation between pod number and fruit weight, as well as between late leaf spot grade and lateral branch length and branch number. Principal component analysis categorized 16 traits into five principal components, with a cumulative contribution rate of 85.013%. The germplasm was divided into four groups by cluster analysis, the large pod group Ⅰ and Ⅱ, and the small and medium pod group Ⅲ and Ⅳ. A comprehensive score is constructed based on the contribution weights of five principal components, the top 10 germplasm resources with the highest comprehensive scores were selected, including ICGV88938 , which exihibited high yield and resistance to late leaf spot disease, four germplasm resources resistant to late spot disease were screened in a natural disease nursery. This study identified and evaluated 16 agronomic traits across 120 germplasm resources, thus providing valuable breeding materials and a theoretical foundation for future peanut variety improvement.

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  • 收稿日期:2024-02-04
  • 最后修改日期:2024-06-04
  • 录用日期:2024-09-02
  • 在线发布日期: 2024-10-24
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