Abstract
Field experiments were carried out in Mozambique (Muirrua Rice Research Station) and Malawi (Lifuwo Rice Research Station), during 2010 and 2011 growing season to evaluate twenty rice (Oryza sativa L.), genotypes under irrigated ecosystem following randomised complete block design (RCBD) with three (3) replications and 20 treatments. Data on number of days to flowering, number of tillers, number of days to maturity, panicle length, number of grains per panicle, grain length, 1000-grain weight, and grain yield were assessed, and analyzed. Muirrua ecosystem produced the highest mean yield (3.96 t ha-1) followed by Lifuwu ecosystem (3.42 t ha-1). Nine traits, namely number of tillers, 1000-grain weight, panicle length, number of grains per panicle, grain length, number of days to 50% flowering, and number of days to maturity were positively correlated with grain yield. Significant differences (P 7.5 mm). Faya showed the highest percentage on the whole grain (60%), in comparison with Marista (20.2%). Key words: Genotypes, ecosystem, environment, characterization, yield.
Highlights
Rice contains thousands of cultivated varieties belonging to two species, Oryza sativa L. grown worldwide and Oryza glaberrima grown mainly in West Africa (Khush, 1997)
Number of tillers per plant, panicle length, number of filled grains per panicle, grain length, 1000-grain weight, grain shape, days to 50% flowering, days to maturity, and leaf length showed significant differences (p
The highest mean for panicle length, number of grains per panicle, grain length, 1000-grain weight, grain shape, days to 50% flowering, days to physiological maturity, and leaf length were identified in the genotypes Nassope (28.82 cm), Mucandara (277), Nene (11.20 mm), Marista (35 g), Singano (4.77), Faya (105 d), Chupa (150 d), and Nassope (55.20 cm), respectively
Summary
Rice contains thousands of cultivated varieties belonging to two species, Oryza sativa L. grown worldwide and Oryza glaberrima grown mainly in West Africa (Khush, 1997). Grown on 154 million hectares worldwide in a wide range of environments (Babu et al, 2012), rice (O. sativa L.) is cultivated between 36 ES to 55 ES and grown from sea level to an elevation of 2500 m above the sea level or even higher (Khush and Singh, 1991; Khush, 1997). It constitutes 27% of dietary energy supply and 20% of dietary protein (Kueneman, 2006), and provides food for more than 50% of the world’s population (Khush, 2005).
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