Studies of Genetic Variability and Inter-Relationship among Some Pumpkin (Cucurbita moschata L.) Landrace of Assam, India
Khirud Panging *
Assam Seed and Organic Certification Agency, Jorhat Zone, Jorhat, Assam, India.
Gobin Candra Bora
Department of Plant Breeding and Genetics, Assam Agricultural University, Jorhat, Assam, India.
Debojit Sarma
Department of Plant Breeding and Genetics, Assam Agricultural University, Jorhat, Assam, India.
Trishna Taye
Department of Plant Pathology, Assam Agricultural University, Jorhat, Assam, India.
Akashi Sarmah
Department of Plant Breeding and Genetics, Assam Agricultural University, Jorhat, Assam, India.
*Author to whom correspondence should be addressed.
Abstract
Thirty diverse landraces of pumpkin comprising from eight districts of Assam viz., four landraces from each district, Sivasager, Dibrugarh, Karbi Anglong, Haflong, Jorhat & Majuli and three landraces from each Lakhimpur and Kokrajhar. The landraces were subjected to analyses of variance and covariance for estimation of genetic variability parameters and correlation coefficients among the 19 characters. The experiment was carried out during the rabi season of 2017-18 at the Instruction Cum and Research (ICR) Farm of Assam Agricultural University in a Randomized Block Design with three replications. From the analysis of variance, it was recorded that the presence of variation among thirty pumpkin landraces for all characters. The highest genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) was recorded for single fruit weight with 51.47 per cent and 54.88 per cent, indicating presence of greater variability for the trait. The heritability in the broad sense was recorded highest for the petiole length. The GA calculated as per cent of the mean was recorded for single fruit weight (99.44%), followed by yield per plant. In character association five traits were positively correlated with fruit yield per plant out of 18 characters.
Keywords: Genetic variability, quantitative, landrace, correlation coefficient
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