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Genotype Affected Callus Induction and Plant Regeneration from Dehusked Rice (Oryza sativa L.) Seeds

Authors
Publisher
The Krishi Foundation
Keywords
  • Agriculture
  • Oryza Sativa
  • Dehusked Rice

Abstract

Microsoft Word - A-80-10 Nasrin Sultana PSTU Final.doc Genetic Divergence in Landraces of Bangladesh Rice (Oryza sativa L.) S. M. Hosan1, Nasrin Sultana2*, K. M. Iftekharuddaula3, Md. Nasar Uddin Ahmed2 and Shamim Mia4 1Biotechnology Division and 3Plant Breeding Division, Bangladesh Rice Research Institute Gazipur- 1701, Bangladesh 2Dept. of Genetics and Plant Breeding and 4Dept. of Agronomy, Patuakhali Science and Technology University, Patuakhali, Bangladesh *Corresponding author and Email: [email protected] Received: 13 October 2010 Accepted: 17 March 2011 Abstract Twenty rice landraces collected from different ecological regions of Bangladesh were studied to assess the nature and magnitude of genetic divergence among them. Based on twelve characters, the genotypes were grouped into five clusters. No parallel relationship between genetic and geographical divergence was observed. Inter-cluster distances were higher than the intra-cluster distances reflecting wider genetic diversity among the genotypes of different groups. The genotypes under cluster IV showed highest divergence among them as it exhibited highest intra-cluster distance. High level of inter-cluster distance was found between cluster II and V and between cluster I and III. Number of filled grains number /panicle, number of panicles/plant, biomass index and grain yield contributed considerably towards total divergence. Germplasm having these characters in the genetically distant cluster could, therefore, offer a significant scope for the development of high yielder through judicious selection. Keywords: Genetic divergence, cluster, landrace, rice (Oryza sativa L.) 1. Introduction Bangladesh is a good source of landraces of rice. Landraces comprise of the unique source for gene of high adaptability but are poor yielders. Therefore, it is an indispensable demand for varietal improvement in such situation. To formulate a sustainable breeding program precise knowledge about

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