1Department of Mycology and Plant pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, Uttar Pradesh, India
3Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, Uttar Pradesh, India
*Corresponding Author: Priyanka Choudhary, Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, Uttar Pradesh, India, Email: prinku30dec@gmail.com
Online Published on 01 December, 2023.
Cercospora leaf spot (CLS) is a fungal disease of mungbean [Vigna radiata (L.) Wilczek] caused by Cercospora canescens and now emerged as an important biotic stress. A better understanding of the genetics of CLS resistance will help in formulating efficient breeding procedures in mungbean.
The present investigation focused on genetics of CLS resistance through generation mean analysis (six parameter model) in two intra-specific mungbean crosses namely, Kopergaon × HUM12 and Kopergaon × ML1720. Four quantitative disease resistance components, viz., area under disease progress curve (AUDPC), incubation period (IP), latent period (LP) and degree of sporulation (SP) were studied.
A high correlation of AUDPC with latent period (r = -0.68 to -0.79, P < 0.0001) and SP (r = 0.72 to -0.81, P<0.0001) advocated that both are main contributor for CLS disease development. High heterosis along with high heritability in terms of AUDPC (>0.09) indicated the importance of genetic factor(s) in controlling CLS resistance. Generation mean analysis of both the crosses revealed duplicate epistatic interaction and involvement of two genes for CLS resistance in terms of AUDPC. This study supports oligogenic nature of inheritance, advocating AUDPC along with IP, LP and SP as important disease indicator for selection of CLS resistance in mungbean.
AUDPC, Cercospora, Epistasis, Heritability, Heterosis, Mungbean
