ABSTRACT

A field experiment was conducted at Regional Agricultural Research Station, Vijayapura, during the rabi season 2023-24, to study the response of wheat genotypes to different growing environments. The experiment was laid out in Randomized Complete Block Design (factorial concept) with three replications. There were twelve treatment combinations, which consist of four sowing windows viz., II fortnight of October, I fortnight of November, II fortnight of November and I fortnight of December and three genotypes viz., UAS 304, UAS 334 and UAS 375. Significantly higher grain yield (2534.72 kg ha-1) and straw yield (4915.12 kg ha-1) was recorded when wheat was sown during II fortnight of October, it was followed by I fortnight of November sowing with grain yield of 2166.74 kg ha-1 and straw yield of 4244.29 kg ha-1. Similarly, significantly higher yield attributes viz., number of panicle per metre row length, panicle weight per metre row length, grain weight per metre row length and test weight were recorded under II fortnight of October sowing. Higher growing degree days was observed with II fortnight of October sowing, while helio-thermal unit, photo-thermal unit and photo-thermal index increased towards maturity with delayed sowing.Among the genotypes, UAS 334, recorded significantly higher grain yield of 2138.71 kg ha-1, which was on par with genotype UAS 375. Different combination of treatments had significant influence on wheat yield. Sowing of genotype UAS 334 during II fortnight of October recorded significantly higher grain yield of 2684.95 kg ha-1, maximum gross returns (`117035 ha-1), net returns (`67933 ha-1) and B:C (2.38).