QTLs for resistance to Setosphaeria turcica in an early maturing DentxFlint maize population

被引：35

作者：

Welz, HG

Xia, XC

Bassetti, P

Melchinger, AE

Lübberstedt, T ^{[1
]}

机构：

[1] Univ Hohenheim, Inst Plant Breeding 350, D-70593 Stuttgart, Germany

[2] Ctr Cadenazzo, Stn Fed Ric Agron, CH-6593 Cadenazzo, Switzerland

来源：

THEORETICAL AND APPLIED GENETICS | 1999年 / 99卷 / 3-4期

关键词：

corn; Exserohilum turcicum; northern corn leaf blight; quantitative resistance; QTL mapping; Setosphaeria turcica; Zea mays;

D O I：

10.1007/s001220051280

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Quantitative trait loci (QTLs) for resistance to the fungal pathogen Setosphaeria turcica, the cause of northern corn leaf blight (NCLB), were mapped in a population of 220 F-3 families derived from a cross between two moderately resistant European inbred lines, D32 (dent) and D145 (flint). The population was genotyped with 87 RFLP and 7 SSR markers. Trials were conducted in the field in Switzerland, and in the greenhouse with selected F3 families in Germany. The F-3 population segregated widely for resistance with transgression of the parents. By composite interval mapping, a total of 13 QTLs were detected with two disease ratings (0 and 3 weeks after flowering). Together these QTLs explained 48% and 62% of the phenotypic variation. Gene action at most QTLs was partially dominant. Eight out of the 13 QTL alleles for resistance were contributed by the more-resistant parent, D145. On chromosomes 3, 5 and 8, QTLs were located in the same chromosomal regions as QTLs in tropical and U.S. Corn Belt germplasm. Some QTLs affected NCLB, head smut and common rust at the same time, with alleles at these loci acting isodirectionally.

引用

页码：649 / 655

页数：7

共 39 条

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