Garg, NaveenDhand, Amit2023-12-122023-12-122022Dhand, Amit (2022). Evaluation of Asiatic radish (Raphanus sativus L.) genotypes for heat stress tolerance (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.https://krishikosh.egranth.ac.in/handle/1/5810202785Thirty genotypes of Asiatic radish (Raphanus sativus L.) were evaluated in a randomized block design with three replications in 6 sowing dates (environments) during summer 2021 for 14 traits at Punjab Agricultural University, Regional Research Station, Bathinda to ascertain their adaptation and adaptability. The six sowing times were E1 (15 March), E2 (15 April), E3 (15 May), E4 (15 June), E5 (15 July) and E6 (15 August). The data were subjected to statistical analysis following AMMI model. The mean squares due to genotypes (G) and environments (E) were significant for all traits. The G × E interaction variance was significant for all traits except root length, root diameter, dry matter and crude fiber and it was partitioned into two principal components i.e. IPCA 1 and IPCA 2 which were significant for 13 and 7 traits, respectively, and explained 67 to 96% of the interaction variance. The residual variance was non-significant for all traits except root: shoot, ascorbic acid and isothiocyanate. Among various environments, E1 recorded the best results for number of leaves, plant weight, root weight, shoot weight and root length, E6 for marketable yield and isothiocyanate, whereas E3 for ascorbic acid. Five top performing genotypes on the basis of marketable yield were G2 (PMMS-1), G11 (RL-2210), G3 (Palak Mooli), G9 (RL-19-1) and G5 (RL-9-1) which yielded 57.2%, 57.0%, 55.4%, 54.9% and 51.7% higher than check i.e. „Pusa Chetki‟ (93.8 q/ha), respectively. These five genotypes also showed general adaptability across all six environments for most traits. However, the best yield performance in E2 and E6 was exhibited by G2, G3, G9 and G11; in E1 by G2, G3 and G11; in E3 and E4 by G2; and in E5 by G3, G9 and G11.EnglishThesis