STUDY OF GENETIC PARAMETERS FOR SEED YIELD AND QUALITY INFLUENCING TRAITS IN MUSTARD (Brassica juncea, Brassicaceae)
MUHAMMAD AHMAD *
Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad 38000, Pakistan.
ALI HAMZA
Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad 38000, Pakistan.
AFAAQ TARIQ
Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad 38000, Pakistan.
MUHAMMAD HAMZA
Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad 38000, Pakistan.
AMMAD U. DIN
Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad 38000, Pakistan.
MUHAMMAD SAAD
Institute of Soil and Environmental Science, University of Agriculture, Faisalabad 38000, Pakistan.
SHABBIR HUSSAIN
Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad 38000, Pakistan.
MUHAMMAD RIZWAN YOUSAF
Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad 38000, Pakistan.
MUHAMMAD AQIB
Institute of Botany, University of the Punjab, Lahore 54000, Pakistan.
HUMA QAMAR
Oilseed Research Station, Ayub Agriculture Research Institute, Faisalabad 38000, Pakistan.
*Author to whom correspondence should be addressed.
Abstract
The yield component and some morphological characters were studied to determine genetic diversity, correlation of different characters towards yield, and path coefficient. The present study was conducted involving 13 Brassica juncea (L.) Czern., lines/genotypes at the Oilseed Research Station, Ayub Agriculture Research Institute (AARI), Faisalabad, Pakistan. The experiment was conducted in a randomized complete block design with three replications from November 2019 to March 2020. Analysis of variance indicated that the genotypes were found significantly different for all the characters considered. The correlation coefficient depicted that plant height (0.9104), and thousand seed weight (0.948) had a highly significant positive genotypic correlation with seed yield. At the same time, days to maturity (-0.849) and linolenic acid (-0.818) showed a strong negative genotypic correlation with seed yield per plant. A highly positive genotypic correlation of thousand seed weight with oil content (0.9067) was observed. The results of genotypic path coefficient analysis uncovered that number of branches (0.859), silique length (0.804), and seeds per silique (0.573) had a positive direct impact on seed yield per plant. Thus, these traits could be exploited to enhance the yield potential of mustard (B. juncea) for future hybridization programs, which could help rapeseed/mustard breeders upgrade their breeding activities.
Keywords: Genotypic correlation, phenotypic correlation, path coefficient, direct-indirect effects, Brassica juncea