Abstract
ABSTRACT Interspecific hybridization is an important technique used in improving rice populations by combining desired traits from different species. However, this could be difficult due to barriers to interspecific hybridization. The objective of this study was to determine the performance of different rice species based on seed set in an interspecific hybridization program. Five Oryza glaberrima genotypes and four interspecific inbred lines were used as female (seed) parents and two improved O. sativa and two interspecific inbred lines (NERICA 2 and NERICA 3) as male (pollen) parents to generate 36 cross combinations representing the North Carolina Design II mating scheme. Four groups of crosses were made: group A (O. glaberrima × O. sativa), group B (O. glaberrima × Interspecific), group C (Interspecific × O. sativa) and group D (Interspecific × Interspecific). Groups A and B had seed-set levels of about 10%. Group D had the highest seed-set level, with a mean of 19%. The least seed-set was for group C...
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