Assessment of Genetic Variability and Relationship between Different Quantitative Traits in Field Pea (Pisum sativum var. arvense) Germplasm

Abstract

Background: Assessment of genetic variability and inter-relationship between the characters can be used in the breeding programme to evolve new varieties with wide genetic diversity to maximize the yield potential in crop improvement programmes. Eighty-four field pea genotypes were evaluated in an augmented block design for thirteen quantitative traits to study variance components, heritability, genetic advance and inter-relationship between the yield and yield contributing traits. Methods: The extent of phenotypic and genotypic variation that exist in a character was calculated by the formula suggested by Burton and de Vane (1953). Heritability in broad sense and genetic advance as per cent of mean for each character was computed using the formula suggested by Hanson et al. (1956) and Johnson et al. (1955), respectively. Correlation coefficient was calculated by method suggested by Searle (1961) and path coefficient analysis done as per method of Wright (1921) and elaborated by Dewey and Lu (1959).Result: Significant differences observed among the genotypes tested for the yield characters indicated the presence of variability. High heritability coupled with high genetic advance as percent of mean was observed for the traits viz., plant height, effective pods plant-1, harvest index and seed yield plant-1 were governed by additive gene effects which will aid in effective selection. Correlation coefficient analysis revealed that seed yield plant-1 had highly significant and positive correlation with biological yield plant-1, effective pods plant-1, harvest index, seeds pods-1 and effective nodes plant-1, indicating that these traits are strongly associated with seed yield in field pea. Path coefficient analysis identified biological yield plant-1 followed by harvest index, seed pod-1, effective nodes plant-1, 100-seed weight and day to 50% flowering as highly desirable components with great direct effects on seed yield.

Genetic Variability, Heritability and Genetic Advance Studies in Field Pea (Pisum sativum L.) for Yield and its Attributing Traits

“…Similarly, moderate PCV and GCV values were recorded for traits like the number of primary branches, pod length, number of seeds per pod, 100 seed weight, grain yield per plant and number of nodules per plant suggesting a considerable amount of variability among the genotypes. These findings are in a line to the findings reported by [7,8,9,10].…”

French bean variety Ooty 3 : A high yielding variety suitable for Temperate zones of Tamil Nadu

“…Percentage increase over check Variety Ooty 1 is 14.59 for green pod yield by its superior performance across the environments over the check variety (Table 7). Such high yield in french beans was also obtained by Reddy et al (2021), Sheik et al (2020, Basavaraja et al (2019), Kargiotidou et al (2019) and Pratap et al (2021).…”

Morpho-Physiological and Biochemical Responses of Field Pea Genotypes under Terminal Heat Stress

“…SY was determined to have a strong positive correlation with NEP, BY, Proline, PL, NSP, SOD and POD under heat stress, suggesting that positive selection on NEP, BY, Proline, PL, NSP, SOD, and POD may indirectly assist in the selection of suitable best performing genotype under heat stress, while in the optimalconditions, SOD and NSP contributed to indirect selection for choosing the best-performing genotype. In addition, the occurrence of a significant negative correlation between SY and MDA under heat stress indicates that a reduction in MDA may increase SY in field pea [ 83 , 84 , 85 ].…”