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• W2997284117 abstract "Increasing genetic variability with mutagenic agents has been broadly employed inplant breeding because this method alters one or more desirable traits, creating aneffective breeding programme. Based on this background, this study was performedto evaluate the genetic diversity of derived mutant lines and to establish the relationbetween yield and its components in them using multivariate analysis to select thebest genotype in grain yield and high nutritional quality. To achieve this objective,two field trials were performed on 45 rice genotypes and four Malaysian commercialvarieties to evaluate their growth and yield traits, and to perform a comparativenutrient analysis. From data collected on quantitative traits, analysis of variance,variance components, heritability, genotypic and phenotypic coefficient variation,and expected genetic advance were estimated. All the vegetative and yield traitsshowed significant variations among the genotypes. Additionally, all of the traitscorrelated positively with the final yield, except for number of tillers.To complement this study, molecular methods were used to study to further confirmthe outcome of this research, establishing the relation between the two methods. Thegenetic diversity of the 45 genotypes was analysed using 25 inter-simple sequencerepeats markers (ISSRs). The data were analysed using NT-SYS software to estimatethe genetic relations among the rice accession from different sources, i.e., Malaysia,Bangladesh and Vietnam, to detect level of polymorphism within and betweenpopulations. The analysis of the molecular variance showed that 90% of total geneticvariations were due to differences within populations, whereas 10% of total geneticvariations were due to differences among populations. A positive correlation wasobserved between similarity distance between the morphological traits and the ISSRmolecular data. Both methods, morphological traits and molecular markers are usefultools for assessing the genetic variability and diversity of the mutant rice genotypes.Data on fodder quality, namely, proximate composition of cell wall content analyses,primary and trace mineral components varied significantly among the genotypes forall of the traits except acid detergent fibre (ADF), acid detergent lignin (ADL),organic matter digestibility (OMD), metabolisable energy (ME), cellulose andhemicellulose. The results from this study indicated that ion beam radiation causedsignificant changes in the agronomic performance of majority of the mutant linescompared with the parental variety (MR219), based on genetic diversity results andagronomic traits performance. Evaluation over two locations, mutant lines ML21, ML10, ML4, ML6 and ML9 performed better in terms of yield production comparedto other mutants. The result from the nutritional characteristic assessment revealedthat ML24 and ML22 rice straw was better in CP, N, P, Mg content compared withother genotypes." @default.
• W2997284117 created "2020-01-10" @default.
• W2997284117 creator A5051834231 @default.
• W2997284117 date "2014-10-01" @default.
• W2997284117 modified "2023-09-27" @default.
• W2997284117 title "Evaluation and selection of rice mutants for high yield and quality fodder production" @default.
• W2997284117 hasPublicationYear "2014" @default.
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