Vegetos
(An International Journal of Plant Research & Biotechnology)
Assessing the inheritance of Cercospora leaf spot and anthracnose resistance in the segregating populations of blackgram [Vigna mungo (L.) Hepper] in the north-western Himalayas
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Sood Rhitisha, Mittal Raj Kumar, Sood Vinod Kumar, Sood Vakul
Research Articles | Published: 15 November, 2024
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Keywords: Anthracnose, Blackgram, CLS, Monogenic, Molecular Mapping, Pulses, Segregation
Abstract
Blackgram is one of the most important food legume whose cultivation is continuously hampered by the attack of several foliar diseases causing microorganisms (present either internally or externally) resulting inconsiderable quantitative and qualitative reduction in yield. Cercospora leaf spot or CLS (Cercospora canescens) and anthracnose (Colletotrichum truncatum) are the most devastating diseases occurring in hilly areas of Himachal Pradesh. Genetic resistance is thought to be an effective method for managing them because chemical control is neither cost-effective nor environmentally safe. In the present study, 10 parents including three varieties as checks, while rest seven as germplasm collections, and their 14 cross combinations were evaluated during Kharif 2018 and 2019 in RBD manner with three replications each at the Experimental Farm of Department of Genetics and Plant Breeding, College of Agriculture, Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishwavidyalaya, Palampur (HP) for monitoring disease resistance which resulted in the identification of three lines viz., IC-281980 and IC-413306 as moderately resistant against CLS and IC-281993 for anthracnose in both the generations. The maximum number of resistant plants against CLS were exhibited by cross IC-413306 × HPBU-111 following IC-413304 × HPBU-111, IC-281980 × HPBU-111, IC-398973 × HPBU-111, IC-281993 × Him Mash-1and IC-398973 × Him Mash-1, whereas, IC-281993 × HPBU-111, IC-436852 × Him Mash-1, IC-281982 × HPBU-111, IC-281980 × Him Mash-1, IC-281993 × Him Mash-1, and IC-413306 × Him Mash-1 had maximum number of resistant plants for anthracnose in the segregating generations. The interpretations of Chi square test for goodness of fit revealed that most of F2 and F3 plants in each of the populations segregated in true pattern i.e. 3 resistant: 1 susceptible ratio for anthracnose highlighting the preponderance of monogenic dominant gene, while in case of CLS complexity of the genes was noted. This study on the genetics of CLS and anthracnose resistance in urdbean will help breeders to create a planned programme for disease resistance breeding and map the genes governing resistance that can be exploited further and play a role in the development of blackgram’s resistance to certain diseases.
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Author Information
Department of Genetics and Plant Breeding, College of Agriculture, CSKHPKV, Palampur, India