Assessing Combining Ability of Doubled Haploid Maize (Zea mays L.) Breeding Lines for Grain Yield and Yield Components under Heat Stress Condition

Maize (Zea mays L.), a leading cereal worldwide and staple food of many countries, is multipurpose crop used for human food, animal feed industry purposes. has wider genetic adaptability to grow under different agro-ecological environments. 29 48 DH lines derived from MPS 1 2, respectively, were crossed with more than one testers belonging opposite heterotic in L x T fashion. The resultant double haploid testcrosses, their parents evaluated along checks during kharif (in South Asia: the autumn sown at beginning summer rains) 2019 three locations. Among female MPS1, line ZL19337 was identified as good general combiner registered significant negative GCA effect days 50 per cent anthesis silking. While, ZL19641 ZL19357 recorded significantly positive plant height grain yield, respectively. ZL19492 effects anthesis, Similarly, lines, ZL19534 ZL19572 combiners yield ear position, ZL1840 silking CAL14113 yield. VL1010996 silking, height, position 2. Hybrid ZH2063 exhibited desired SCA ZH2010 specific 1. ZH20158 desirable trait ZH20251 ZH20183