Year: 2015 | Month: June | Volume 8 | Issue 2
Heterosis studies in diallel crosses of maize for yield and yield attributing traits in maize (Zea mays L.) over locations
DOI:10.5958/2230-732X.2015.00034.0
Abstract:
A study was undertaken to estimate the heterotic, heterobeltiotic and standard heterotic effects of 11 characters of 45 maize hybrids developed by ten parents in maize during rabi, 2011-12 over three locations viz., College Farm, Rajendranagar (Hyderabad), Agricultural Research Station, Karimnagar and Agricultural Research Station, Kampasagar, Nalgonda District, T.S. The pooled analysis of variance (Diallel) revealed significant differences among locations and genotypes for all the characters studied. The crosses exhibited significant differences, indicating varying performance of cross combinations. The parent vs crosses which indicates average heterosis, for all the traits, thus considerable amount of average heterosis was reflected in hybrids. Negative standard heterosis was observed for days to 50 per cent tasseling, days to 50 per cent silking and days to maturity due to earliness in three hybrids over checks DHM-117 and 900 M Gold were BML-2782 X BML-5233-5, CM-211 X BML-5233-5 and BML-2486 X BML-2. Five crosses viz. BML-15 X BML-2910, BML-7 X BML-3044, CM-211 X BML-7, BML-6 X BML-2 and BML-2782 X BML-6 were identified as potential hybrids with more than 12% standard heterosis for grain yield over better yielding commercial hybrid check DHM-117. Testing of these hybrids in all India coordinated trials across the different states of the country may result in identification of better hybrids in the near future for commercial exploitation.
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