Genetic variability, correlation and path coefficient studies in F2 generation of short slender aromatic and medium slender non-aromatic rice (Oryza sativa L.)

Abstract

Genetic variability, correlation, direct and indirect effects between yield and yield component traits were studied in the F 2 population of MDU 6 × VGD 1 and Improved Samba Mashuri × VGD 1 for six characters. Number of filled grains per panicle and single plant yield recorded high PCV, GCV and high heritability coupled with high genetic advance as per cent mean in both the crosses which indicated the presence of additive gene action and selection may be effective for these traits. Number of productive tillers per plant had moderate PCV, GCV, heritability and genetic advance as per cent mean in both crosses. Number of productive tillers per plant also had significant positive correlation with maximum direct effect on single plant yield in both the crosses. This indicated that the selection for high number of productive tillers per plant will bring concurrent improvement in yield as well.

Analysis of genetic variability and correlation for yield and its attributing traits in F2 population of rice (Oryza sativa L.)

“…Thus, improvement in this trait may result into simultaneous improvement in grain yield. These results are resemblances with the findings of Norain et al (2014) for grain yield per plant, grains per panicle and straw yield per plant and Kumar et al (2020) for straw yield per plant.…”

“…All the F 2 segregating populations demonstrated higher genetic advance as a per cent mean in terms of plant height, productive tillers per plant, grains per panicle, grain yield per plant and straw yield per plant. These findings are in conformation with those of Kahani and Hittalmani (2015) who reported the higher genetic advance as a per cent mean for plant height; Savitha and Usha (2015) for grain yield per plant; Sala and Santhi (2016) for productive tillers per plant; Balat (2018) for grain yield per plant and straw yield per plant and Kumar et al (2020) for productive tillers per plant. When determining the impact of heritability on selecting the best individuals, heritability estimates in combination with genetic advancement are more useful than heritability alone.…”

“…Improvement in above mentioned traits may lead to simultaneous improvement in grain yield per plant and thus they may be considered important yield attributing characters. Similar kind of results showing significant correlation for grain yield per plant were reported by Kumar et al (2015) for harvest index, grains per panicle, straw yield per plant and panicle length; Subbulakshmi and Muthuswamy (2018) for grains per panicle and productive tillers per plant; Kumar et al (2017) for plant height and panicle length; Seneega et al (2019) for plant height, panicle length and productive tillers per plant and Kumar et al (2020) for plant height, productive tillers per plant and panicle length.…”

Multivariate analysis of wild rice MAGIC population under sodic soil condition

“…Selection based on these traits could result in a proportionate increase in grain yield. The results are in agreement with Guru et al (2016), Prasannakumari et al (2020), Rashid et al(2014) and Sathishkumar et al (2020) for plant height and the number of productive tillers per plant, Guru et al (2016) for the number of grains per panicle, Worede et al (2014) for panicle length, Kumar et al (2018) for 100 grain weight, Rahman et al (2013) for spad meter reading, Bhattachrara et al(2019) for flag leaf area.…”