• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Australian Journal of Crop Science >Genetic variability on leaf morpho-anatomical traits in relation to sterility mosaic disease (SMD) resistance in pigeonpea
【24h】

Genetic variability on leaf morpho-anatomical traits in relation to sterility mosaic disease (SMD) resistance in pigeonpea

机译：木豆叶片形态解剖特征的遗传变异性与不育性花叶病（SMD）抗性的关系

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Sterility mosaic disease (SMD) is a major biotic constraint in almost all pigeonpea growing areas caused by eriophyid mite transmitted pigeonpea sterility mosaic virus (PPSMV). Direct selection for resistance to SMD is expensive and laborious as it requires dependent of sick plots. Identification of easily assayable and simply inherited morphological traits such as leaf anatomical traits would enable increased efficiency of breeding pigeonpea for SMD resistance. A set of 70 pigeonpea accessions were evaluated for 12 leaf structural features such as leaf thickness (LT), upper epidermal thickness (UEPT), lower epidermal thickness (LEPT), upper cuticle cell wall complex (UCWC), lower cuticle cell wall complex (LCWC), trichome number on upper surface of leaf (TNUS), trichome number on lower surface of leaf (TNLS), trichome length on upper surface of leaf (TLUS) and on lower surface of leaf (TLLS) at experimental plots of Zonal Agricultural Research Station (ZARS), UAS, Bengaluru. The accessions differed significantly for most of the traits except for specific leaf area (SLA) and specific leaf weight (SLW). The accessions were grouped into four clusters, with significant differences in cluster means and variances. Principal component analysis (PCA) showed first three PCs explaining 69.70 % of the total variation and morpho-anatomical traits such as leaf thickness (LT), trichome length on upper (TLUS) and lower (TLLS) surface of leaf were the most important characters for disease incidence. Furthermore, correlation of all the leaf traits in relation to percent incidence (PDI) indicated only TLLS having significant negative correlation (-0.456*) with SMD incidence. While, trichome length also showed higher phenotypic (PCV) and genotypic (GCV) coefficient of variation 34.33 and 34.02, respectively and broad senesce heritability (98.2%) coupled with high genetic advance (69.45). Therefore, breeding for trichome length is very important to impart vector resistance. This may provide broad based resistance to all the isolates of SMD in pigeonpea.
机译：不育花叶病（SMD）是几乎所有木豆生长区的主要生物限制因素，是由麦粒螨传播的木豆不育花叶病毒（PPSMV）引起的。直接选择抗SMD的方法既昂贵又费力，因为它需要依赖病态的地块。鉴定易于分析和简单遗传的形态特征，例如叶片解剖学特征，将使提高木豆抗SMD的效率。对一组70个木豆种质进行了12个叶片结构特征的评估，例如叶片厚度（LT），上表皮厚度（UEPT），下表皮厚度（LEPT），上表皮细胞壁复合物（UCWC），下表皮细胞壁复合物（ （LCWC），叶片上表面的毛状体数（TNUS），叶片下表面的毛状体数（TNLS），叶片上表面的毛状体长度（TLUS）和叶片下表面的毛状体长度（TLLS）班加罗尔UAS研究站（ZARS）。除特异叶面积（SLA）和特异叶重（SLW）外，大多数性状的种质差异很大。这些种被分为四个类，在类均值和方差上有显着差异。主成分分析（PCA）显示，前三个PC解释了69.70％的总变异和最重要的特征，如叶片厚度（LT），叶片上表面（TLUS）和下表面（TLLS）的毛状体长度等形态解剖特征用于疾病的发生。此外，所有叶片性状与发生率（PDI）的相关性表明，只有TLLS与SMD发生率显着负相关（-0.456 *）。同时，毛状体长度还表现出较高的表型（PCV）和基因型（GCV）变异系数，分别为34.33和34.02，宽泛的遗传力（98.2％）以及较高的遗传进展（69.45）。因此，对于毛状体长度的育种对于赋予载体抗性非常重要。这可以为木豆中的所有SMD分离株提供广泛的抗药性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号