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Genetic analysis and molecular mapping of eui1 gene conferring elongated uppermost internode in the indica rice mutant Xieqingzao eB1

Published online by Cambridge University Press:  12 February 2007

Ma Hong-Li
Affiliation:
Institute of Genetics and Crop Breeding, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Zhang Shu-Biao
Affiliation:
Institute of Genetics and Crop Breeding, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Lu Qin
Affiliation:
Institute of Genetics and Crop Breeding, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Fang Xuan-Jun
Affiliation:
Hainan Provincial Institute of Tropical Agricultural Resources, Sanya, 572025, China
Yang Shu-Lan
Affiliation:
Institute of Genetics and Crop Breeding, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Yang Ren-Cui*
Affiliation:
Institute of Genetics and Crop Breeding, Fujian Agriculture and Forestry University, Fuzhou 350002, China
*
*Corresponding author: Email: [email protected]

Abstract

The indica rice Xieqingzao eB1 (XQZ eB1), a mutant with an elongated uppermost internode, was produced by mutagenesis from elite maintainer line Xieqingzao B (XQZ B) using γ-radiation. Compared with the wild-type XQZ B, plant height and the length of the rice panicle neck, second internode and third internode from the panicle were elongated significantly in XQZ eB1. Genetic analysis indicated that the trait for uppermost internode elongation of XQZ eB1 is controlled by a single recessive gene eui1, which is allelic to that of IR50eui (derived from 76:4512). Further studies were carried out using the bulk segregated analysis approach. An F3 population, derived from the cross XQZ eB1×Aijiaonante, was used to map the mutant gene eui1. Two SSR makers, RM164 and AC9, were identified to link to eui1, their genetic distances to eui1 being 18.4 and 7.9 cM, respectively. The eui1 gene was also mapped to the long arm of chromosome 5 in this research.

Type
Research Article
Copyright
Copyright © China Agricultural University and Cambridge University Press 2004

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