Evaluation of promising lines for yield and quality traits along with leaf curl virus disease resistance in pickled chilli (Capsicum annuum L.)

Ravinder Singh

Evaluation of promising lines for yield and quality traits along with leaf curl virus disease resistance in pickled chilli (Capsicum annuum L.)

Date

2024

Authors

Ravinder Singh

Publisher

Punjab Agricultural University

Abstract

The present study was conducted to evaluate seventy-five pickled chilli genotypes for various yield and quality traits at Vegetable Research Farm, Punjab Agricultural University, Ludhiana during 2021-23. The research findings depicts that all the genotypes differ in the expression of different traits. Like, genotype PCP-732-2 exhibited the highest plant height (72.1 cm) but was not superior in other traits. All the characters evaluated, possessed high heritability along with high genetic advance as a percent of the mean except for number of fruits per plant. Fruit yield per plant exhibited significant and positive correlation with fruit length, fruit width, pericarp thickness, number of fruits per plant and average fruit weight at both the phenotypic and genotypic levels. Path analysis had provided insights that number of primary branches, fruit length, pericarp thickness, number of fruits per plant, average fruit weight, capsaicin in green fruits, oleoresin content and colouring matter have direct and positive effect on fruit yield per plant at both phenotypic and genotypic levels. Therefore, emphasizing these Principal component analysis indicated that most of the variation among the genotypes was contributed by the first seven principal components (> 70%). Among the variables, plant height emerged as a key contributor followed by the number of primary branches, fruit length and fruit width. Cluster analysis concluded that seventy-five genotypes were classified into four clusters. Cluster I entailed maximum number of genotypes (37), followed by Cluster II (30), III (7) and IV (1). The maximum intra-class distance was found in cluster I followed by cluster II and cluster III. The inter-class distance was found highest between cluster I and cluster IV followed by cluster II-cluster III. The larger the inter-class distance, the more distinct and well-separated the clusters from each other. Natural and artificial screening against chilli leaf curl virus disease reported that genotypes specifically, FLP-649, PCP-7001, PCP-701-1 and PCP-754 were found to be resistant while, artificial screening against rootknot nematodes reported that genotype PUP-607 and PCP-701-1 exhibited resistant reaction. Hence, genotype PCP-701-1 possessed resistance against both diseases.

Citation

Ravinder Singh (2024). Evaluation of promising lines for yield and quality traits along with leaf curl virus disease resistance in pickled chilli (Capsicum annuum L.) (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.