Vol. 11, Issue 9 (2022)

Author(s):
Shivendra Kumar Giri, Jyoti Sahu, Rajkamal Gour, Kirtan Kumar, Pratiksha Bhagat and Dr. SK Sinha

Abstract:
In the present investigation, study of genetic variability for grain yield & its component in maize was carried out based on 15 traits during the rabi-summer 2021-2022 at the Farm of Raj Mohini Devi College of Agriculture & Research Station, Ambikapur. The material used under the research comprises of 14 maize inbred line (9 lines and 5 testers). During the kharif 2021, 45 crosses were made by adopting crossing design ‘Line x Tester’ & in the Rabi 2022, these 45 crosses along with the parents (14) and 3 commercial checks viz. NK 30, CGASM 1 & COH (M) 8 were planted in RBD with 3 replication each, with 3 rows of each having row length of 4m and the plant to plant and row to row distance was 20 cm & 60 cm respectively. Analysis of Variance (ANOVA) revealed that except for ear diameter, MSS of all the genotype was highly significant @ 1% level which showed that the genotypes differ significantly for specific traits under observation. GCV & PCV of high magnitude was found for 2 traits viz., grain yield (23.30% & 26.73%) & ear weight without husk (21.93% & 25.15%). GCV & PCV of moderate magnitude was recorded for plant population (11.73% & 15.33%) & no. of cobs (11.12% & 15.15%). High heritability with high GA was found for the characters viz. ear weight without husk (76.08%) having GA 39.42, grain yield (75.98%) with GA 41.85 & high heritability was found for days to 50% tasseling (86.30%) and days to 50% silking (85.04%) with low GA of 8.21 & 7.86 respectively, whereas the characters including days to 80% maturity (71.17%) having GA of 4.71, ear height (62.09%) with GA 14.62, ear length (70.79%) with GA 19.00, plant height (71.47%) with GA 17.18,, no. of kernels/row (63.33%) with GA 15.38 showed high heritability. The present study implicate that the genotypes tested, possess considerable amount of variability and can be manipulated for further breeding program.