Vol. 10, Issue 8 (2021)

Author(s):
Bharat Bhushan, SS Dodake and PY Shinde

Abstract:
The present investigations on "Inheritance of drought tolerance traits in wheat (Triticum aestivum L.)" were conducted during the period rabi 2015-16. Gene action of 5 morphological, 11 physiological characters were studied to know the genetics of drought tolerance in two wheat crosses under restricted irrigation condition. The materials consist of two crosses involving four parents (NIAW-34, NIAW-343, NIAW-917, NIAW-2030) with six generation. The difference due to different genotypes for all the sixteen characters were highly significant, indicating high degree of variability. The parameter ‘m’ was highly significant in all the crosses for all the characters under study. Additive as well as Dominant genetic effects were highly significant in both the crosses, except SPAD reading in cross NIAW-917 X NIAW-2030 for Additive as well as Dominant genetic effects and 1000 grain weight for Dominant genetic effects in NIAW-917 X NIAW-2030. The epistatic gene interactions (i, j and l) for Days for 50% flowering, NPR, TR, RLWC, Chlorophyll stability index (CSI), Chlorophyll ‘b’ and TCC were highly significant additive x additive, additive x dominance and dominance x dominance epistatic gene interactions observed in both the crosses. Duplicate type of epistasis was observed for Days to maturity, grain yield per plant, TR, RLWC, Chlorophyll stability index (CSI), DTI, and TCC in both crosses. Complementary type of epistasis was observed only for 1000 grain weight in cross NIAW-34 X NIAW-343 and cross NIAW-917 X NIAW 2030 recorded Complementary type of epistasis for NPR and SC.