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Main Article Content
Genetic Diversity and Cluster Analysis of Selected M6 Ofada Rice Mutants and Parents For Agronomic and Yield-Related Traits
Abstract
Ofada rice is one of the indigenous rice extensively cultivated in South-Western Nigeria where its prominence in the last few decades is possibly due to its peculiar taste, natural flavour, higher nutritive value and higher fibre compared to polished rice. Efforts towards its improvement for yield indices have nonetheless been minimal; hence yield is the basis of this research. Twenty-five genotypes comprising twenty-three (23) promising M6 Ofada rice selections from a mutation breeding programme and 2 parent lines were planted in a randomized complete block design (RCBD) with three replications to assess genetic variation as a guide for distinctness, hybridization and further selection. Analysis of variance (ANOVA) revealed highly significant (P < 0.01) variation among genotypes for all the studied traits. Mean plant height ranged between 112.33cm (OG13608_300) to 133.00cm (OW13615_100). The highest mean tiller number (18.33) was from OG13605_200 while 0G13606_250 had the least mean value for days to 50% flowering (74) and days to maturity (92). The highest mean number of days to maturity (108 days) was recorded by (FUNAABOR 2 and OW13614_100. OW13620_250 had the highest grain weight per/panicle (10.87g) and the highest grain weight per plant (104.93g). The dendrogram grouped the genotypes into 3 clusters and recorded a high level of diversity. Cluster I incorporated the highest number of selections with the highest cluster mean for grain weight per panicle (9.46g) Cluster III entries had the highest mean for tiller number (13), panicle length (28.85cm) and grain weight per plant (64.84g). Therefore, hybridization of promising selections from Cluster I with appropriate members from Cluster III could offer higher heterosis among the ensuing progenies.
