Genetic Variability, Heritability and Correlation Coefficient in Production Traits of Pea (<i>Pisum sativum</i> L.) Genotypes

Abstract

An experiment was carried out to measure variability, heritability, genetic advance and correlation coefficient for yield and yield related traits in ten Pea (Pisum sativum L.) genotypes at Tarnab-Peshawar, during cropping season 2016-17. To identify the best genotypes for further breeding these genotypes were evaluated in a randomized complete block design with three replications. All genotypes were grown in 3m long ridges, which were kept 60cm apart where plant to plant distance was 30cm. To reduce experimental error, cultural practices were performed uniformly for all genotypes. Data was collected from ten randomly selected plants from each genotype in each replication. Highly significant (p ≤ 0.01) differences were observed for days to 50% flowering, plant height, primary branches plant -1 , days to maturity, pods plant -1 , pod length, fresh pod shelling percentage, 100-seeds fresh and dry weight, seeds pod -1 and seed yield plant -1 . Among genotypes Sultan was best for 50% flowering (50.38), days to maturity (122.08) and fresh pod shelling percentage (65.29%). Genotype PL-4 had maximum plant height (142.08 cm), pods plant -1 (39.96) and seed yield plant -1 (52.04 g). Anmol had maximum 100-seed fresh (43.90 g) and dry (21.29 g) weight. Genotype Sarsabz had maximum primary branches plant -1 whereas Adventa Selection had maximum pod length (8.86 cm) and seeds pod -1 (6.26). The estimates of heritability and genetic advance were high for days to 50% flowering (0.99, 35.38%), plant height (0.95, 46.88%) and seed yield plant -1 (0.97, 62.47%). High heritability with moderate genetic advance were observed for days to maturity (0.97, 20.20%), pod length (0.95, 15.37%) fresh pod shelling percentage (0.82, 21.58%), 100-seed fresh (0.90, 29.52%) and dry weight (0.93, 22.68%). Significant and positive phenotypic coefficient of correlation was exhibited by seed yield plant -1 with plant height (r p = 0.64), days to 50% flowering (r p = 0.63), days to maturity (r p = 0.78), pods plant -1 (r p = 0.72), pod length (r p = 0.66), fresh pod shelling percentage (r p = 0.64), 100-seed fresh weight (r p = 0.65) and 100-seed dry weight (r p = 0.62). Significant and positive genotypic coefficient of correlation was exhibited by seed yield plant -1 with plant height (r g = 0.81), days to maturity (r g = 0.70) and pods plant -1 (r g = 0.84). Among tested genotypes Sultan, PL-4, Anmol and Sarsabz performed better, therefore could be used in future breeding programs.

Studies on Genetic Variability, Heritability and Genetic Advance in Garden Pea (Pisum sativum L.) Genotypes under the Central Dry Zone of Karnataka, India

“…In the present experiment, heritability was highest for all the parameters studied (>90 %) except Days to first flowering (60.69 %) and Days to 50 per cent flowering (78.86 %). The high heritability estimates for these characters revealed the lesser influence of the environment and selecting genotypes based on such characters would be worthwhile in garden pea improvement.Similar results were noticed by Ali et al (2021), Priyanka and Lal (2021), Yadav et al (2021) and Uhlarik et al (2022).…”

“…This reveals the influence of the environment on these characters is negligible and the role of genotypic performance for the full expression of the phenotype. These findings are following Gupta et al (2020), Ali et al (2021) and Priyanka and Lal (2021). While moderate (11-20%) for length of a pod, width of a pod, number of seeds per pod, pod yield per plant, total soluble solids, reducing sugars and total sugars.…”

Genetic Investigation in Garden Pea for Yield and Quality Characters

“…The existence of variability is critical for crop improvement programs and the magnitude of variability for a specific character determines the success of genetic improvement of a particular character. Similar to the present findings, wide variation for various characters was recorded by Ali and Ahmed [10][11][12]. However, the analysis of variance by itself is not enough and conclusive to explain all the inherent genotypic variance in the genotypes.…”

Evaluation of Genetic Variability, Heritability and Genetic Advance in Garden Pea (Pisum sativum L.)

“…Records were kept of the following: plant height (93.6-52.8), plant width (100-59), days until first bloom (64.2-55.4), days until half bloom (70.2-60.2), number of branches per plant (7.6-5), number of cases per plant (23.6-16.6), number of seeds per unit (8.6-6), unit length (5.2-3.6), case width (7.3-5.3), weight of 100 seeds (34. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19], days until first reap (79-70), yield per plant (160-73), and yield per (2.6-1.3). "Genotypic variation (GCV), phenotypic variation (PCV), heritability (in the broadest sense), and genetic drift (expressed as a percentage of the mean) were all analyzed for the features under investigation (Table 2).…”

“…In order to begin a breeding program for crop improvement, a breeder must have access to crucial knowledge on the collection, preservation, and assessment of germplasm [12][13][14]. "Since heritability serves as a forecasting tool in expressing the dependability of phenotypic features, characteristics with a high heritability may aid in the effective selection of certain characters and the creation of future breeding programs [15][16][17][18]. Taking a closer look at the factors that affect yield provides a more realistic picture of the current state of affairs.…”