Genetic Analysis and Gene Mapping of Sensitivity to Nicosulfuron in Corn

doi:10.3969/j.issn.1000-7091.2012.04.028

Abstract

Abstract: The sulfonylurea herbicide, nicosulfuron, has been used widely and rapidly for weed control, because its advantages such as low application rates,low toxicity, broad-spectrum and flexible application. A total of 81 corn inbreds including Wny-1 and yn-6 were evaluated for tolerance to nicosulfuron. F1, BC1 populations were constructed on the basis of the hybridization between Wny-1 and yn-6 and were used for genetic analysis of nicosulfuron sensi- tivity. Sensitive plants in BC1 population were used for mapping this gene with SSR markers. Of 81 inbreds evalua- ted,73 were resistant and 8 were susceptible. A single recessive nuclear gene which was located on the short arm of chromosome 5 determined sensitivity to nicosulfuron in yn-6. This gene was mapped between 5S-96 and 5S-78 with physical distance of 0.18 Mb and temporarily named nsfy.

Key words: Sulfonylurea, Sensitivity, Genetic analysis, Gene mapping

CLC Number:

S513.023

HONG Cui-ping, HAN Shuai, ZHANG Yan-jun, WANG Li-jing, WEI Hai-zhong, ZHONG Shi-yi, LIU Bao-shen. Genetic Analysis and Gene Mapping of Sensitivity to Nicosulfuron in Corn[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2012, 27(4): 149-152. doi: 10.3969/j.issn.1000-7091.2012.04.028.

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