G × E interaction studies under different production systems in maize (Zea mays L.)
| dc.contributor.advisor | Katna, Gopal | |
| dc.contributor.author | Sood, Raghav | |
| dc.date.accessioned | 2023-02-23T10:02:10Z | |
| dc.date.available | 2023-02-23T10:02:10Z | |
| dc.date.issued | 2022-12-26 | |
| dc.description.abstract | The present investigation was carried out for G × E interaction analysis of twelve maize genotypes for fourteen traits at six environments during kharif, 2021 and 2022 under two different production systems (Subhash Palekar Natural Farming and inorganic production system) using randomized block design with three replications. The pooled analysis of variance across environments exhibited significant mean squares due to environments and genotypes, whereas for G × E interaction all the traits except kernel rows per cob and ear circumference were found significant. G × E interaction and stability analysis following AMMI model also exhibited significant variation due to genotypes and environments for all the traits indicating presence of sufficient variability among the genotypes and environments, whereas G × E interaction was significant for all the traits except for number of kernel rows per cob and ear circumference (cm). The contribution of environment was greater than 50% for all the traits except number of kernel rows per cob, ear circumference (cm), 100-grain weight (g), harvest index (%) and protein (%). The mean squares for the IPCA 1, IPCA 2 and IPCA 3 cumulatively contributed more than 80% of the total G × E interaction for all the traits. AMMI stability index (ASI) and AMMI stability value (ASV) revealed that Girija was stable for maximum number of traits viz., days to 50% tasseling, days to 75% maturity, plant height (cm), cob height (cm), grain yield per plant (g) and 100-grain weight (g) across all six environments followed by L-315 which was stable for days to 50% silking, grain yield per plant (g), number of kernels per row, ear length (cm) and protein (%) and L-316 was stable for days to 50% tasseling, days to 75% maturity and harvest index (%) and also had highest mean grain yield per plant across all environments. AMMI biplots revealed that the environment Palampur under the inorganic production system was most favourable for number of kernels per row, ear length (cm), grain yield per plant (g) and 100-grain weight (g). Girija was most stable for grain yield per plant followed by L-315, L-316 and L-318 under inorganic production system. Bajaura Makka followed by L-315 and L-316 were stable genotypes under Subhash Palekar Natural Farming production system with high grain yield per plant. L-315 and L-316 were found suitable for cultivation under both production systems. | en_US |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810194319 | |
| dc.keywords | Maize, Zea mays L., Production systems, G × E interaction, AMMI stability index | en_US |
| dc.language.iso | English | en_US |
| dc.pages | 106 | en_US |
| dc.publisher | CSK HPKV, Palampur | en_US |
| dc.sub | Genetics and Plant Breeding | en_US |
| dc.theme | To understand the nature of G × E interaction for yield and its contributing traits, and to identify stable maize genotypes for different production systems. | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | G × E interaction studies under different production systems in maize (Zea mays L.) | en_US |
| dc.type | Thesis | en_US |