ASSESSMENT OF GENETIC VARIABILITY OF SELECTED UPLAND RICE GENOTYPES GROWN IN A HUMID TROPICAL ENVIRONMENT
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Abstract
A field experiment was conducted in the growing season (May to August) of 2020 and 2021 in Calabar, Cross River State to assess the genetic variability of selected upland rice and evaluate the attributes that contribute to high yields. The experiment was laid out in a randomized complete block design replicated two times. The results showed that genotypes varied significantly for most of the traits studied. For tillering capacity, WAB 56-104, IR90, IRAT109, WAB 638-1 and Moroberekan performed better than others. High to medium phenotypic and genotypic coefficients of variation (11 to 48 %), heritability (71 to 91 %) and genetic advance was observed for number of leaves, number of panicles, leaf area, panicle length and total number of grains. These genotypes could be used for further breeding studies. The following traits; number of leaves, number of panicles, number of spikelets per panicle, number of filled grains per panicle and total number of grains could be exploited for further studies because of their high heritability and genetic advance which provides a basis for selection.
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