Author(s):

Arvind Malik, Pooran Chand, SA Kerkhi, SK Singh, Pankaj Kumar and MK Yadav

Abstract: The present investigation entitled “Detection of Gene Action for Morpho-Physiological Traits with Reference to heat tolerance in wheat (Triticum aestivum. L)” was carried out at CRC, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut. The experimental materials for the present study involved 10 genetically diverse wheat varieties namely, HUW 510, PBW 373, RAJ 3765, K 9423, AAI 1536, RAJ 4128, HUW 251, C 306, DBW 17 and PBW 343. These parental lines were mating in diallel fashion excluding reciprocals during the rabi season of 2015-2016. The parents and their 45 F_1s were also grown in the next year during rabi season of 2016-2017 under irrigated conditions in randomized block design with three replications with two date of sowing i.e., timely sown (E₁) on 25 November, 2016 and late sown (E₂) 30 December 2016. Estimation of correlation coefficient at phenotypic level grain yield per plant exhibited highly significant and positive association with days to maturity, number of productive tillers per plant, grain filling duration, spike length, number of grains per spike, 1000 grain weight, biological yield per plant, proline content, leaf senescence under both timely and late sown indicated that the improving these traits could improvement in yield. Genotypic and phenotypic coefficient revealed that biological yield per plant and 1000 grain weight direct effect on grain yield. Therefore, direct selection for these two traits would be effective for further yield improvement in wheat genotypes.

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