Evaluation of genetic resources and deciphering the inheritance of powdery mildew resistance in pea (Pisum sativum L.) genotypes, EC865944 and EC865975

Authors

  • Jyoti Devi ICAR-Indian Institute of Vegetable Research, Post Box 1, Jakhini, Varanasi 221 305, India Author
  • Anmol S Yadav Department of Mycology and Plant Pathology, Instititute of Agricultural Sciences, Banaras Hindu University,Varanasi 221 005, India Author
  • Rakesh K Dubey ICAR-Indian Institute of Vegetable Research, Post Box 1, Jakhini, Varanasi 221 305, India Author
  • Vidya Sagar ICAR-Indian Institute of Vegetable Research, Post Box 1, Jakhini, Varanasi 221 305, India Author
  • K.K. Pandey ICAR-Indian Institute of Vegetable Research, Post Box 1, Jakhini, Varanasi 221 305, India Author
  • Sudarshan Maurya ICAR-Indian Institute of Vegetable Research, Post Box 1, Jakhini, Varanasi 221 305, India Author

DOI:

https://doi.org/10.61180/vegsci.2024.v51.i2.05

Keywords:

Powdery mildew, Erysiphe, Pisum, Resistance and Inheritance and Yield.

Abstract

Pea, a major cool-season vegetable legume, suffer substantial yield and quality losses due to powdery mildew (PM), caused by the parasitic fungus species Erysiphe. This disease can lead to yield reductions of 25–70%, affecting quality of produce with notable economic impact. Resistance breeding is one of the most environmentally sustainable strategies to manage this devastating disease. Over a period of three year, a total of 172 diverse pea accessions were field evaluated for powdery mildew resistance (PMR), among which 35 accessions displayed a disease score rating of 0-1, indicating a disease incidence of ≤1%. Notably, three accessions—IC296678, EC865944, and EC865975—demonstrated high resistance levels against Erysiphe pisi. Histopathological observations showed that no conidia germination occurred on the resistant lines IC296678, EC865975 and EC865944 at both 24- and 48-hours post-inoculation, indicating a pre-invasive type of immunity in these genotypes. To investigate the gene action and inheritance patterns of PM resistance in EC865944 and EC865975, we utilized five cross combinations viz., EC865975 × Kashi Udai, EC865944 × VRPM-903, Kashi Ageti × EC865944, EC865944 × Kashi Nandini, and EC865975 × Kashi Shakti. Analysis of the F2 population from these crosses revealed a segregation pattern of one resistant to three susceptible, indicating the presence of a single recessive gene in both the genotypes. Horticultural characterization of these genotypes showed that both belonged to the late-maturing group of peas, characterized by a taller growth habit, an average pod weight ranging from 5.5 to 7.5 g, and an average yield of 75–100 g per plant. These newly identified PMR sources provide invaluable genetic resources, not only for Indian breeders but also for researchers globally, offering a significant step forward in sustainable pea improvement.

Published

2024-12-31

Issue

Section

Research Articles

How to Cite

Devi, J., Yadav, A. S., Dubey, R. K., Sagar, V., Pandey, K. ., & Sudarshan Maurya. (2024). Evaluation of genetic resources and deciphering the inheritance of powdery mildew resistance in pea (Pisum sativum L.) genotypes, EC865944 and EC865975. Vegetable Science, 51(02), 236-241. https://doi.org/10.61180/vegsci.2024.v51.i2.05

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