STUDIES ON STANDARD HETEROSIS OF SINGLE CROSSES OF TROPICAL WHITE MAIZE FOR GRAIN YIELD AND YIELD CONTRIBUTING TRAITS
Journal Title: International Journal of Agricultural Science and Research (IJASR) - Year 2017, Vol 7, Issue 2
Abstract
In Ghana, low yields of 1.7 t ha-1 has been reported .This prominent difference in grain yields has been attributed partially to the use of open pollinated varieties (OPVs), shortage of high yielding varieties, biotic and abiotic stresses. Thus, the present study was designed to estimate the magnitude of heterosis of the single crosses over checks for yield and yield-contributing characters. A line x tester mating design involving sixteen white maize inbred lines as females and two testers as males generated thirty-two single crosses. These hybrids and three checks were evaluated using a 5 x 7 alpha lattice design replicated twice at the University of Ghana, WACCI research farm during 2015/-16 offseason using drip irrigation. Heterotic effects were observed for grain yield, days to 50% anthesis, days to 50% silking, anthesis-silking interval, plant height, husk cover , ear height, maize streak virus, plant aspect, ear length, ear rot, number of kernel rows ear-1 and number of kernels row-1, however the magnitude varied with characters. From this study hybrids L8 x T2, L1 x T2, L16 x T1, L16 x T2 L4 x T2, L9 x T1 exhibited 54%, 45%, 41% 26%, 24% and 24% heterosis for grain yield respectively, over best check Obatanpa.
Authors and Affiliations
YAZACHEW GENET EJIGU, BEATRICE ELOHOR IFIE, PANGIRAYI BERNARD TONGOONA
Keywords
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