PJB-2019-829
Agronomic Evaluation and Estimation of Genetic Parameters, Correlation and Path Coefficient Analysis of Parental and Hybrid Genotypes of Rice in Northern Guinea Savannah Ecology of Nigeria
Abu, N. E.
Abstract
Seven rice genotypes involving six cultivated and one non cultivated genotype were crossed at the Teaching and Research Farm of the Abubakar Tafawa Balewa University, Bauchi, Nigeria. The 7 parents and 8 successful hybrids comprising the F1 and F2 plants were evaluated in Northern Guinea Savannah Ecology of Nigeria. The aim was to identify superior hybrids for advancement and determine the level of diversity and degree of association existing between grain yield and its related component. The experiment was conducted in the field under rain fed conditions using randomized complete block design (RCBD) of 3 replications. Grain yield (g/plt) ranged from 10.25 – 37.55 among the parents, 5.10 – 48.7 among the F1 and 10.25 – 52.7 among the F2. FARO 11 × Tog 5681 in the F2 recorded a higher number of seeds per plant (880.70 seeds) as compared to 495.50 seeds in FARO 11 parent and 583.25 seeds in TOG 5681 parent. At the segregating generation (F2) Moroberaka x FARO 48 recorded the highest value in most of the traits. Panicle length, number of seeds/plant and number of seeds/main tiller/plant had significant positive correlation (r2<0.05) of 80%, 74%, and 54% with grain yield, respectively. Grain yield had 296.03 and 136.16 for phenotypic (σ2p) and genotypic variances (σ2g). The Principal Component Analysis (PCA) showed that the first 3 principal axis explained 38.4%, 23.61% and 23.61% of the variance giving a total variance of 72.8%. The path coefficient showed that number of panicles per plant had the highest direct effect (0.243) on grain yield and indirect effects through the number of leaves/plt and number of seeds/plt. Selection based on number of panicle/plt, number of leaves, number of seeds/plt and advancing Moroeraka x FARO 48 and FARO 19 × FARO 54 hybrids could increase rice production in the Northern Guinea Savannah Ecology of Nigeria.
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