Studies on genetic variability and character association in Pigeonpea (Cajanus cajan (L.) Mill sp.)

Abstract

Fourty eight Pigeonpea(Cajanus cajan (L.) Mill sp) genotypes were evaluated for yield and yield component characters indicated the existence of considerable genetic variation in the present investigation. The components of variance revealed that the phenotypic coefficient of variation (PCV) were higher than genotypic coefficient of variation (GCV) for all the characters studied indicating the role of environmental variance in the total variance. The magnitude of PCV and GCV was moderate to high for seed yield per plant and number of pods per plant. Heritability in broad sense was higher in most of the characters viz., test weight, days to maturity, days to 50 per cent of flowering, seed yield per plant, number of pods per plant and number of branches per plant. High heritability coupled with high genetic advance as percent of mean was observed for seed yield per plant, number of pods per plant and test weight. indicating the role of additive gene in expressing these traits. Seed yield was significant positive association with number of pods per plant, number of branches per plant and test weight and these are major yield contributing traits to be given selection pressure for improving yield.

Studies on variability for yield and yield attributing traits in pigeonpea [Cajanus cajan (L.) Millsp.]

“…The estimates of GCV and PCV were high in number of branch per plant, seed yield per plant, harvest index, biological yield per plant and days to flowering, offering better scope for selection as there was less influence of environment. Similar results for high GCV and PCV were obtained by Thanga et al (2019) [20] and Bathini et al (2021) [4] for number of branch per plant, Rao and Rao (2020) [16] , Pashwan et al (2021) [14] and Bathini et al (2021) [4] for seed yield per plant, Rangare et al (2013) [15] and Pashwan et al (2021) [14] for harvest index, Pandey et al (2015) [12] and Pashwan et al (2021) [14] for biological yield per plant and Yerimani et al (2013) [21] and Sharma et al (2012) [18] for days to flowering. Moderate estimates of genotypic and phenotypic coefficient of variation were observed for number of seed per pod, number of pod per plant, pod length, plant height and days to maturity, indicates moderate amount of variability present in the population.…”

“…High heritability coupled with high genetic advance expressed as percent of mean were observed for days to flowering, days to maturity, number of seed per pod, pod length, number of pod per plant, number of branch per plant, seed yield per plant, harvest index and biological yield per plant, indicating the presence of additive gene action and less environmental influence on the characters and existence of sufficient heritable variation and wider scope for effective selection. Similar results for high heritability and high GAM were recorded by Rangare et al (2013) [15] and Sharma et al (2012) [18] for days to flowering, Rao and Rao (2020) [16] for days to maturity, number of branch per plant and number of pod per plant, Pandey et al (2015) [12] for number of seed per pod and seed yield per plant, Gupta et al (1975) [9] for pod length, Rangare et al (2013) [15] and Pashwan et al (2021) [14] for harvest index. Moderate heritability coupled with moderate genetic advance as percent of mean was observed for trait viz., plant height and test weight, indicating additive gene action in their inheritance.…”

Assessment of Genetic Variability to Contribute Yield and its Components Characters in Pigeonpea [Cajanus cajan (L.) Millsp.] Genotypes in Central Plain Agro-Climatic Region of Uttar Pradesh, India

“…The moderate value of genetic advance over mean was recorded for harvest index (19.15), biological yield (12.30) and number of seeds per pod (11.93). The finding was in agreement with the finding of [24,25,26,27]. The present investigation revealed high heritability coupled with high genetic advance as percent mean for most of the characters indicating the presence of considerable genetic variation and additive gene effects.…”

RETRACTED: Variability among maize (Zea mays L.) inbred lines for agro- morphological traits

“…The disease score had a higher phenotypic variance than genotypic variance, indicating that the environment had an important effect on this trait. GCV indicates a large level of genetic variation, but only heritability estimates and genetic gain may be used to calculate the amount of heritable variation (Rao and Rao 2015) . Plant breeders can select genotypes from genetic diversity with the use of heritability estimation (Terfa and Gurmu 2020).…”