Genetic Variability and Path Analysis of Groundnut (<i>Arachis hypogaea</i> L.)

Abstract

An experiment was conducted at the Research farm of Regional Agricultural Research Station, BARI, Hathazari, Chittagong during Rabi season (December to April), 2009-2010 for estimation of genetic variability, genetic parameters and correlation coefficient among different yield components in a randomized block design with three replications. Thirty four groundnut genotypes were tested in the experiment. Highly significant variations were observed among the genotypes for all the characters studied. The highest genetic coefficient of variation was observed for karnel yield per hectare, followed by karnel yield per plant, branches per plant, immature and mature nuts per plant, 100 kernal weight and plant height. The highest heritability was observed in karnel yield per pant (95.08%), followed by karnel yield per hectare (94.38%), 100 kernal weight (87.01%), immature and mature nuts per plant (82.24%, 80.32%), branches per plant (79.54%) and 100 nut weight (78.98%), while high values of genetic advance were obtained in all the characters except days to maturity and days to 50% flowering. The seed yield per plant showed the highly significant and positive association with nut size, number of nuts per plant, karnel size and days to 50% flowering. The number of mature nuts per plant had high positive direct effect on seed yield per hectare followed by nut size, shelling percentage, days to 50% flowering and days to maturity. Therefore, branches per plant, plant height, nuts per plant, nut size, karnel size, days to 50% flowering, shelling percentage and days to maturity were identified to be the important characters which could be used in selection for yield. Keywords: Genetic variability; heritability; genetic advance; groundnut DOI: http://dx.doi.org/10.3329/agric.v9i1-2.9476 The Agriculturists 2011; 9(1&amp;2): 29-36

Variability Studies for Quantitative Traits in F3 Generation of Groundnut (Arachis hypogaea L.)

“…The cross, CO 7 × VRI Gn 6 exhibited medium PCV, GCV, high heritability and medium GAM values. These observations are in agreement with the findings of Zaman et al, (2011).…”

Estimation of Genetic Parameters in Groundnut (Arachis hypogaea L.) for Yield and It’s Contributing Characters under Inorganic Fertilizer Managements

“…The estimates of phenotypic coefficient of variation were higher than genotypic coefficient of variation for all the 14 characters indicating the influence of environment in the expression of these traits. Similar kind of observations were also reported by Zaman et al, (2011), Satish (2014, Vasanthi et al, (2015), Jibrin et al, (2016) and Kamde et al, (2017).…”

“…All traits except days to maturity exhibited higher estimates of genetic advance as per cent of mean indicated that these traits were governed by additive genes and selection will be rewarding for improvement of such traits High heritability coupled with high genetic advance as per cent of mean were recorded for number of immature pods per plant followed by days to 50% flowering, number of primary branches per plant, shelling percentage, number of pods per plant, number of mature pods per plant, plant height and 100 kernel weight. Similar results were reported for number of immature pods per plant, plant height, days to 50 % flowering and 100 seed weight by Zaman et al, (2011), John et al, (2013, Sudhir et al, (2008) and Bhargavi et al, (2016) respectively. High heritability coupled with high genetic advance as per cent of mean for number of primary branches per plant and shelling percentage was in accordance with the results of Satish (2014) and Narasimhulu et al, (2012), respectively, suggesting that additive gene action in expression of these traits and selection would be effective for improvement of these traits.…”

“…Moderate estimates of GCV and PCV were observed for days to 50 % flowering and shelling percentage. Moderate estimates of GCV and PCV recorded for days to 50 % flowering and shelling percentage were in accordance with the results of Patil et al, (2014) and Zaman et al, (2011) respectively. On contrary days to maturity showed lower estimates of coefficient of variation.…”

Genetic characteristics and path coefficient analysis in ten groundnut varieties (Arachis hypogaea L.) evaluated in the Guinea Savannah agro-ecological zone

“…Coefficient of variation at genotypic and phenotypic levels, heritability and genetic advance have been calculated for different yield parameters in groundnut by several research workers (khan et al, 2000;Meta and Monpara, 2010;Zaman et al, 2011) and have shown the importance of these parameters in enhancing success in a planned breeding program. High heritability estimate coupled with high genetic advance for a character could serve as a better criterion for selection (Johnson et al, 1955).…”