Variability, character association and path coefficient analysis of green pod yield and its related traits in pea (Pisum sativum L.)

Abstract

Genetic variability, character association and path coefficient studies were carried out for yield and yield contributing characters for twenty-four diverse genotype of pea. The results revealed a wide range of phenotypic variation, along with high heritability in pea. Highest pod yield per plant was recorded in VRP-229 followed by VRP-372 and VRP-305. The characters namely, plant height and weight of seeds per pod showed high magnitude, while number of pods per plant, number of branches per plant and pod yield per plant showed moderate magnitude for phenotypic and genotypic coefficient of variation. The heritability and genetic advance were high for days to first pod initiation, plant height and pod yield per plant indicating its additive gene action for their expression. Character association studies revealed that pod yield per plant exhibit positive and highly significant correlation with number of pods per plant, number of branches per plant and days to fifty percent flowering. The path coefficient studies also revealed that maximum positive direct effect was observed through number of pods per plant followed by days to first flowering, single pod weight and pod length towards yield indicated that these characters may be considered as the most reliable selection indices while making selection for high yielding genotypes.

Studies on genetic parameters, correlation and path coefficient analysis in er2 introgressed garden pea genotypes

“…Number of primary branches per plant (0.464) showed significant and positive correlation with pod yield per plant at genotypic level suggesting that direct selection for this trait should be practiced to develop high yielding genotypes. Similar observations were also reported by Pal and Singh (2012), Gautam et al, (2017) and Khan et al, (2017). Days to first picking (-0.641, -0.526) exhibited significant negative correlation with pod yield per plant both at genotypic and phenotypic levels.…”

“…The results of path analysis revealed that days to 50 per cent flowering (0.493) had maximum positive direct effect on pod yield per plant followed by number of seeds per pod (0.394), number of pods per plant (0.260), shelling percentage (0.113), plant height (0.052) and total soluble solids (0.035) at the phenotypic level and days to 50 per cent flowering (1.460) followed by number of pods per plant (0.258), shelling percentage (0.135) and number of primary branches per plant (0.009) at genotypic level (Table 4). Similar findings have already been reported for number of pods per plant by Gautam et al, (2017), Sharma et al, (2009), Kumar et al, (2014 and Bijalwan et al, (2018). Sharma et al, (2011) also reported positive direct effect of shelling percentage on pod yield per plant.…”

“…Significant differences were observed with respect to pod length (7.95-10.20 cm), number of seeds per pod (6.25-9.25), shelling percentage (40.92%-53.24%), number of pods per plant (13.17-19.17), plant height (63.72-74.13 cm), number of primary branches per plant (1.14-2.17) and pod yield per plant (69.17-105.75 g). Wide variations with respect to different characters have been reported by Gautam et al, (2017), Khan et al, (2017), Ali et al, (2018) and Barcchiya et al, (2018). Magnitude of phenotypic coefficient of variation (PCV) was higher than the corresponding genotypic coefficient of variation (GCV) for all the traits studied suggesting that the environment played an important role in the expression of these traits (Table 2).…”

“…Pea (Pisum sativum L.) is an important vegetable crop grown in temperate and subtropical areas of the world for its tender and immature seeds. It is consumed as fresh vegetable in the growing season, while dried seeds are used as pulses during off-season (Gautam et al, 2017). Large proportion of peas is processed (canned, frozen or dehydrated).…”

Genetic variability parameters of yield and quality attributes in vegetable pea (Pisum sativum L.)

“…Pod weight is another important yield component and needs due consideration while making selection for yield (GAUTAM et al, 2017). All the genotypes differ significantly for pod weight.…”