Genetic variability, heritability and genetic advance of yield and lodging-related traits in rice (Oryza sativa L.)

Abstract

This study was conducted to determine the PCV and GCV, heritability (bs) and genetic gain in lodging resistance and lodging-related traits among selected high yielding rice varieties of Kerala. Results revealed the presence of large genotypic differences in yield, lodging and related traits and difference between PCV and GCV among all the selected genotypes. Both PCV and GCV were highest for seed yield per plant followed by panicle weight and tillers plant -1 . Heritability was high and ranged from (99.81 %) potassium content to (91.43 %) panicle weight. The genetic advance as per cent of mean estimates was high for all the traits and highest for lodging per cent (84.83 %). The high estimates of genetic advance indicating that, the selection for characters viz., internodal length, culm wall thickness, lodging perc ent, seed yield per plant, silicon and potassium content will be effective for further improving overall lodging resistance.

Genetic Variability and Cause-Effect Relationship in Aromatic Rice

“…The rest of the characters have heritability estimates greater than 70% but less than 90%. Similar results were reported by Roy and Shil (2020), Keerthiraj and Biju (2020), Akhtar et al (2022), Challa et al (2022), Kulsum et al (2022), Singh et al (2022), Sadhu et al (2023), Shanmugam et al (2023).…”

Genetic variability and yield analysis in rice

“…The number of panicle and secondary branches per panicle exhibited moderate GCV and high PCV. Similar results were reported for flag leaf area (Saha et al, 2019), the number of spikelets (Saha et al, 2019), the number of grain (Yadav et al, 2018), test weight (Chandramohan et al, 2016), grain yield (Bhati et al, 2015;Mamata et al, 2018;Keerthiraj and Biju, 2020), plant height (Manjunatha et al, 2017;Pragnya et al, 2018), days to flowering (Behera et al, 2018), length of panicle (Pragnya et al, 2018). The large difference between PCV and GCV values for the number of panicles, flag leaf area, the number of secondary branches per panicle, spikelet fertility and seed yield is due to the greater contribution of the environment in the expression of these characters.…”

Combining ability studies for lodging resistance and yield traits in rice

“…Lodging is a complex trait having interactions between many agro-morphological traits such as, plant height (Yang et al, 2000), diameter and length of basal internode (Wan and Ma, 2003), type of panicle (Ma et al, 2004), upper plant weight, lignin content, cellulose content, rate of nitrogen application (Yang et al, 2009), silicon content (Ma and Yamaji, 2006) and yield and cultivation condition (Cuo et al, 2003). Seed yield is also a complex trait the expression of which depends upon various yield contributing traits such as test weight, number of seeds per panicle, panicle weight, number of panicles, number of tillers and lodging resistance (Keerthiraj et al, 2020 (a); Keerthiraj et al, 2020(c)). The knowledge on combining ability is useful in selecting the desirable parents and cross combinations at the same time elucidate the nature and magnitude of gene actions involved (Xiang et al, 2016).…”