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Two improved tropical maize composites, TZL COMP3 and TZL COMP4; representing complementary heterotic pools have been subjected to four cycles of reciprocal recurrent selection (RRS) for two decades to enhance varietal cross performance. The objectives of this study were to evaluate the effect of selection on genetic gain in heterosis for grain yield and other agronomic traits of these composites...
Introduced maize (Zea mays L.) germplasm can serve as sources of favorable alleles to enhance performance in new maize varieties and hybrids under drought stress conditions. In the present study, the combining abilities of 12 exotic maize inbred lines from CIMMYT and 12 adapted maize inbred lines from IITA were studied for grain yield and other traits under controlled drought stress. The inbred lines...
Leaf explants of sweetpotato (Ipomoea batatas L. (Lam.)) were cultured on Murashige and Skoog medium (MS) with varying levels (0.2-1 mg l -1 ) of 2,4-dichlorophenoxyacetic acid (2,4-D; stage I) and transferred to a medium with zeatin riboside (0.2-0.4 mg l -1 ; stage II). The highest frequency (over 80%) shoot regeneration occurred in the genotype PI 318846-3 cultured on...
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