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Economic heterosis in double cross hybrids of maize


Crop Research (Hisar) 8(3): 634-636
Economic heterosis in double cross hybrids of maize
Hybrid varieties wherever feasible make better use of heterosis than any other breeding procedure yet developed. Expression of heterosis was studied in 23 double cross hybrids. Significant differences were exhibited in 23 double cross hybrids for the characters, namely, grain yield per plot, days to 50 per cent silk, plant and ear height. The extent of economic heterosis revealed that double cross hybrids with high heterosis for yield, in general, also exhibited high estimates for one or more of yield components as well. Out of 23 hybrids, 16 hybrids exhibited significant positive heterosis for grain yield over the best check Shweta. The extent of economic heterosis among different hybrids for yield was up to 88.5 per cent. Among these, six hybrids were found more promising for earliness also. Hybrid (9 times 12) times (10 times 15) showed reduced plant and ear height along with higher grain yield. Best five hybrids (9 times 13) times (9 times 12), (20 times 4016) times (14 times 21), (7 times 11) times (9 times 13), (19 times 10) times (9 times 12) and (11 times 12) times (4 times 19) yielded more than 71 per cent over the best check Shweta, thus can be exploited commercially.


Accession: 002808525



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