GrainGenes Reference Report: EUP-137-291
Reference
EUP-137-291
Title
QTL mapping of net blotch resistance genes in a doubled-haploid population of six-rowed barley.
Journal
Euphytica
Year
2004
Volume
137
Pages
291-296
Author
Ma ZQ Lapitan NLV Steffenson B
Abstract
Net blotch, caused by Pyrenophora teres f. teres , is a damaging foliar disease of barley worldwide. It is important to identify resistance germplasm and study their genetics. 'Chevron', a six-rowed barley used as a parent for the production of a doubled haploid (DH) population for mapping of Fusarium head blight (FHB) resistance, was also found to be resistant to net blotch. To map the resistance genes, the population was evaluated for resistance at the seedling stage in a greenhouse. The resistance data showed a two-peak distribution. Through linkage mapping, one resistance gene, tentatively called Rpt , was located on chromosome 6HS flanked by Xksua3b-Xwg719d , which was also detected by QTL mapping. This QTL explained 64% of the phenotypic variance for the resistance in this DH population. In addition, a minor QTL was found on chromosome 2HS defined by Xcdo786-Xabc156a . 'Chevron' and 'Stander' contributed the resistant alleles of Rpt and the 2HS QTL, respectively. Both QTLs together explained nearly 70% of the phenotypic variance. The markers for these QTLs are useful for marker-assisted selection of net blotch resistance in barley breeding
Keyword
barley
[ Show all 17 ]
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: EUP-137-291
|
| ||||
|
| ||||
|
| ||||
|
| ||||
|
| ||||
|
| ||||
|
| ||||
|
| ||||
|
|
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||