Title: IDENTIFICATION AND GENETIC MAPPING OF A FRAGILE AND DWARF RICE MUTANT
Abstract: A fragile and dwarf rice mutant(dfr) was obtained from M2 population of indica variety 9311 irradiated by nitrogen ion beam.The plant height of the mutant is 74.5cm,while that of wild type is 122.9cm.Cell wall composition analysis indicated that cellulose and hemi-cellulose contents in leaf of the mutant and wild type were 13.8% and 23.8%,24.2% and 20.6%,respectively,which in stem were 22.3% and 34.1%,30.3% and 18.6%,respectively.Other cell wall components changed slightly.Genetic analysis showed that the character of dfr was controlled by a recessive gene.The dfr gene was mapped on rice chromosome 2 by using a F2 population developed from a cross between the mutant and 02428,and the genetic distances from the gene to the linked SSR markers RM5472 and RM240 were 1.1cM and 1.6cM,respectively.The above results laid the basis for the research of the fragile and dwarf mutant and its gene cloning.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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