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《Acta Botanica Sinica》 2001-01
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Genetic and Microsatellite Analyses of a New Elongated Uppermost Internode Gene eui2 of Rice

YANG Shu_Lan 1, YANG Ren_Cui 1 *, QU Xue_Ping 2, ZHANG Qing_Qi 1, HUANG Rong_Hua 1, WANG Bin 2 [WT6BZ](1. Institute of Genetics and Crop Breeding, Fujian Agricultural University, Fuzhou 350002, China; 2. Institute of Genetics, The Chinese Academy  
Two mutants possessing elongated uppermost internode, Xieqingzao eB_1 (XQZeB_1) and Xieqingzao eB_2 (XQZeB_2), were identified from M 2 population of Xieqingzao B_line (XQZB) treated with γ_ray. The proportion of uppermost internode length to entire culm length of XQZeB_2 and XQZeB_1 were 65.3% and 54.8%, respectively. Compared with the original XQZB, the increased length of uppermost internode of XQZeB_2 contributed to the total increased culm length by 90.2% as well as XQZeB_1 by 53.3%. Genetic analysis showed that the characters of elongated uppermost internode in the two mutants were governed by one pair of recessive gene respectively. The recessive gene of XQZeB_1 is allelic to the reported eui , but that of XQZeB_2 is non_allelic to it by allelic test. Therefore, the elongated_uppermost_internode gene of XQZeB_2 is a new gene, designated as eui2. Microsatellite markers RM258, RM269, RM271 and RM304, which were linked with eui2 and located on chromosome 10, were identified. The genetic distances from the four markers to eui2 were 12.0 cM, 12.9 cM, 35.1 cM, 1.4 cM, respectively. It could be concluded that eui2 gene was located on the middle of the long arm of chromosome 10.
【Fund】: 福建省自然科学基金重大项目!(C970 2 6)&&
【CateGory Index】: Q943
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