Genetic Variability, Heritability and Expected Genetic Advances of Quantitative Characters in F2 Progenies of Soybean Crosses

Abstract

The F2 progenies of crosses among three soybean varieties were evaluated with their parents at Ngale Experimental Farm, Ngawi, East Java during the dry season of 2011. The experi-ment was conducted in a randomized block design with three replications. The seeds of each F2 progenies and parents were planted in two rows of 4.5 m long. Plant spacing was 40 cm x 15 cm and each hill contained one plant. Among the characters studied, seed weight per plant, number of pods per plant and days to maturity had the highest coefficient of variability with the means of 52.6%, 48.2% and 41.9%, respectively. Whereas seed size, plant height and number of reproductive nodes had moderate values of 36.9%, 35.5% and 37.4%, respectively. Number of branches and days to flowering had the lowest variability of 11.7% and 15.3%, respectively. Number of pods per plant, days to maturity, plant height and seed size had high mean estimates of heritability coupled with high genetic advance. The genetic progress of these characters that would be obtained for one generation of selection was estimated 47.2%, 45.7%, 40.9% and 40.3%, respectively. Among the agronomic characters, plant height, number of pods per plant, seed size and days to maturity had the highest coefficient of variability associated with high heritability and genetic advance. Therefore, selection for high yielding with early maturity soybean genotypes based on plant height, number of pods per plant and seed size might be possible.

Correlation, path analysis and heritability estimation for agronomic traits contribute to yield on soybean

“…In this study, the heritability value of days to flowering, days to maturing, plant height, number of branches, number of pods, weight of 100 seeds, and yield were categorized high ( Table 2). These findings reinforce the results of previous studies that find high heritability value in these agronomic traits [10][11][12][13][14]. When compared with the heritability value of other agronomic traits, three traits including days to flowering, days to maturing and plant height, have a heritability value close to 1 (0.88, 0.72 and 0.76, respectively), meaning that the three characters are inherited from the elders to their offspring.…”

Selection strategies in agronomic characters in progenies F3:4 of transgenic soy RR

“…When estimating heritabilities in two F 4 populations of soybean, Hakim and Suyamto (2012) found for the population 1 values of 30.3% (NDF); 39.8% (NDM); 53.7% (PHM); 33.5% (NNM); 20.6% (NPN); 55.4% (TNP) and 18.3% (GP). For population 2, heritabilities were 36.1% (NDF); 42.6% (NDM); 58.2% (PHM); 26.7% (NNM); 18.3% (NPN); 47.6% (TNP) and 21.1% (GP).…”

Evaluation of reciprocal cross populations for spike-related traits in early consecutive generations of bread wheat (Triticum aestivum L.)

“…The reason of this result was role of environment is dominant in the expression of these traits. KHAN et al (2013) and HAKIM et al (2014) determined to low heritability, genetic advance and genotypic coefficient of variance for these traits while KHAN et al (2003), HUSSAIN et al 2013 When Table 2a examined, the highest mean values were observed in reciprocal crosses for plant height, spike length, spikelet number per spike, spike harvest index and in parents for grain number per spikelet, grain number per spike, grain weight per spike, spike density, grain yield per plot in F3 generations. Krasunia and Sana; 'Bezostaja-1 x Krasunia' and 'Sana x F85'; 'Sana x Krasunia' and 'Krasunia x Pehlivan' were the best genotype among parents, real crosses and reciprocals respectively (Table 2a).…”