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Abstract <p>The development of yellow mosaic disease (YMD) resistant and early maturing photo-insensitive varieties can go a long way to harness the productivity potential of soybean. This study reports the agro-morphological characterization and evaluation for agronomically important traits including resistance to YMD and earliness in a set of 500 germplasm accessions during 2020–21. Of these, 20 accessions were observed as resistant which were further validated along with infector susceptible rows during 2022–23 in a replicated RBD with respect to important traits including disease incidence, severity and white fly counts at New Delhi. The molecular diagnostic test through PCR confirmation of coat protein gene specific primers revealed the presence of MYMIV (mungbean yellow mosaic India virus). To better understand the association between the dynamics of the white fly population (WFC), disease severity (DS)% and disease incidence (DI)%, data were taken over different time intervals during the crop growing period. Contrary to the expectations, white fly count (WFC) and DS(%) did not show significant correlation at any of the crop stages from the early vegetative to the flowering stage. WFC did show a significant association with DI% when the crop reached the adult plant stage. The study conducted over four years across locations under natural hot spot and artificial inoculation conditions revealed the superiority of germplasm accessions EC1077386 and EC993255 for YMD resistance coupled with early maturity (&lt; 95&#xa0;days). Furthermore, of the 28 MYMIV resistance linked putative SSR markers, five were polymorphic among the genotypes studied and the marker BARC_14_1422 differentiated the resistant and susceptible genotypes. The overall findings are expected to contribute to further understanding of host-vector-pathogen dynamics and development of YMD resistant and early maturing varieties for soybean improvement.</p> Graphical Abstract <p></p>

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The dynamics of yellow mosaic disease and white fly populations and the identification of resistant accessions in soybean germplasm collection

  • 期刊论文

  • 发表日期：

    2025年6月22日

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  • Raj Kumar Gautam,
  • Mamta Singh,
  • Karambir Singh Hooda,
  • Sapna Langyan,
  • K.A. Ayana,
  • Ishwar Singh,
  • Kuldeep Tripathi,
  • V Celia Chalam,
  • Parimalan Rangan,
  • Simpi Rana,
  • Badal Singh,
  • Kajal Das,
  • BS Gill,
  • MK Nautiyal,
  • MK Dhillon,
  • GP Singh

摘要

Abstract

The development of yellow mosaic disease (YMD) resistant and early maturing photo-insensitive varieties can go a long way to harness the productivity potential of soybean. This study reports the agro-morphological characterization and evaluation for agronomically important traits including resistance to YMD and earliness in a set of 500 germplasm accessions during 2020–21. Of these, 20 accessions were observed as resistant which were further validated along with infector susceptible rows during 2022–23 in a replicated RBD with respect to important traits including disease incidence, severity and white fly counts at New Delhi. The molecular diagnostic test through PCR confirmation of coat protein gene specific primers revealed the presence of MYMIV (mungbean yellow mosaic India virus). To better understand the association between the dynamics of the white fly population (WFC), disease severity (DS)% and disease incidence (DI)%, data were taken over different time intervals during the crop growing period. Contrary to the expectations, white fly count (WFC) and DS(%) did not show significant correlation at any of the crop stages from the early vegetative to the flowering stage. WFC did show a significant association with DI% when the crop reached the adult plant stage. The study conducted over four years across locations under natural hot spot and artificial inoculation conditions revealed the superiority of germplasm accessions EC1077386 and EC993255 for YMD resistance coupled with early maturity (< 95 days). Furthermore, of the 28 MYMIV resistance linked putative SSR markers, five were polymorphic among the genotypes studied and the marker BARC_14_1422 differentiated the resistant and susceptible genotypes. The overall findings are expected to contribute to further understanding of host-vector-pathogen dynamics and development of YMD resistant and early maturing varieties for soybean improvement.

Graphical Abstract