Study of Inheritance of resistance to powdery mildew of pea using different isolates of Erysiphe pisi

Authors

  • JAYA CHAUDHARY* and D.K. BANYAL

Keywords:

Diallel, Erysiphe pisi, inheritance, pea, Pisum sativum, powdery mildew

Abstract

Pea (Pisum sativum L.) powdery mildew caused by Erysiphe pisi DC ex. Saint-Amans is an air-borne disease of worldwide distribution, being particularly important in climates with dry days and cool nights. The disease is more prevalent at flowering and pod formation stage and appears in epidemic form almost every year in India and other countries of world. The disease is of utmost importance in Himachal Pradesh as the crop is grown throughout the year in different agro climatic zones of state. Yield losses upto 47 per cent have been reported due to powdery mildew in India by different workers. Fungicide spraying is the most common method for the management of disease, however the use of resistant cultivars is very effective management strategy. The resistance against powdery mildew in pea is controlled by recessive gene(s), but there are contradicting reports regarding the nature and number of gene(s) controlling resistance against powdery mildew. The present investigation was undertaken to study the genetics of powdery mildew resistance in pea by using 4 isolates viz., PM-9, PM-11, PM-18, PM-23 of E. pisi in a controlled environment. Eleven resistant pea lines (DPP-362, JP-501-A/2, PMR-21, KMNR-894, JI-2480, Acacia, EC-381866-1, Mr. Big, PMR-10, JI-2302, JI-1766) were crossed in diallel mating design along with susceptible cultivar Lincoln. Segregation pattern of F2 population of 11 crosses revealed a ratio of 1 resistant to 3 susceptible thereby indicating the presence of single recessive gene in donor parents, indicating that resistance in genotypes DPP-362, JP-501-A/2, PMR-21, KMNR-894, JI-2480, Acacia, EC-381866-1, Mr. Big, PMR-10, JI-2302, JI-1766 is governed by single recessive gene.

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Issue

Vol. 69 No. 4s (2016): Indian Phytopathology : Special Issue

Section

Research Articles

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How to Cite

D.K. BANYAL, J. C. and. (2016). Study of Inheritance of resistance to powdery mildew of pea using different isolates of Erysiphe pisi. Indian Phytopathology, 69(4s), 116-120. http://epubs.icar.org.in/ejournal/index.php/IPPJ/article/view/71248