文献类型： 外文期刊
作者： Liu, L. 1 ; Zhang, Y. D. 1 ; Li, H. Y. 1 ; Bi, Y. Q. 1 ; Yu, L. J. 1 ; Fan, X. M. 1 ; Tan, J. 2 ; Jeffers, D. P. 3 ; Kang, M 1 ;
作者机构： 1.Yunnan TianRui Seed Co Ltd, Yunnan Acad Agr Sci, Inst Food Crops, Kunming 650200, Yunnan Province, Peoples R China
2.Yunnan Univ, Sch Agr, Kunming 650091, Yunnan Province, Peoples R China
3.Yunnan Acad Agr Sci, CIMMYT Yunnan Off, Inst Food Crops, Kunming 650200, Yunnan Province, Peoples R China
4.Kansas State Univ, Dept Plant Pathol, Throckmorton Hall, Manhattan, KS 66506 USA
期刊名称：PLANT DISEASE （ 影响因子：4.438； 五年影响因子：4.7 ）
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收录情况： SCI
摘要： A tropical gray leaf spot (GLS)-resistant line, YML 32, was crossed to a temperate GLS-susceptible line, Ye 478, to produce an F2:3 population for the identification of quantitative trait loci (QTL) associated with resistance to GLS. The population was evaluated for GLS disease resistance and flowering time at two locations in Yunnan province. Seven QTL using GLS disease scores and six QTL using flowering time were identified on chromosomes 2, 3, 4, 5, and 8 in the YML 32 x Ye 478 maize population. All QTL, except one identified on chromosome 2 using flowering time, were overlapped with the QTL for GLS disease scores. Theresults indicated that QTL for flowering time in this population strongly corresponded to QTL for GLS resistance. Among the QTL, qRgls.yaas-8-llqFt.yaa.s-8 with the largest genetic effect accounted for 17.9 to 18.1 and 1 1.0 to 21.42% of variations for GLS disease scores and flowering time, respectively, and these should be very useful for improving resistance to GLS, especially in subtropical maize breeding programs. The QTL effects for resistance to GLS were predominantly additive in nature, with a dominance effect having been found for two QTL on the basis of joint segregation genetic analysis and QTL analysis.
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