Molecular Tagging Wheat Powdery Mildew Resistance Gene  Pm21  by EST-SSR and STS Markers

Xiaolei Qi<sup>1</sup>; Fa Cui<sup>1</sup>; Yu Li<sup>1</sup>; Anming Ding<sup>1</sup>; Jun Li<sup>1</sup>; Guiling Chen<sup>1</sup>; Honggang Wang<sup>1,2</sup>

Xiaolei Qi¹

, Fa Cui¹

, Yu Li¹

, Anming Ding¹

, Jun Li¹

, Guiling Chen¹

, Honggang Wang^1,2

1. State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271018, P.R. China
2.Taiâ€™an Subcenter of National Wheat Improvement Center, Agronomy College of Shandong Agricultural University, Tai'an, 271018, P.R. China

Author

Correspondence author
Molecular Plant Breeding, 2010, Vol. 1, No. 4 doi: 10.5376/mpb.2010.01.0004
Received: 06 May, 2010 Accepted: 10 Jul., 2010 Published: 28 Sep., 2010

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Preferred citation for this article:

Qi et al., 2010, Molecular tagging wheat powdery mildew resistance gene Pm21 by EST-SSR and STS markers, Molecular Plant Breeding Vol.1 No.4 (doi: 10.5376/mpb.2010.01.0004)

Abstract

In order to enrich the molecular markers linked to wheat powdery mildew resistance gene Pm21 and facilitate the molecular marker-assisted selection in multi-background breeding procedure, preferred small groups (PSG) analysis was conducted using F₂ segregating population cross between the wheat germplasm line CB033 with Pm21 and a common wheat variety Huixianhong (susceptible to wheat powdery mildew). One hundred and two markers revealed polymorphism between the parents when screening with 258 SSR or STS markers located on wheat homoeologous group VI, and two EST-SSR markers (Xcfe164 and Xedm129) and one STS marker (Xcinau188) showed good consistency between the genotype and the phenotype to mildew in PSG. Linkage relationship between Pm21 and molecular markers of Xcfe164, Xedm129 and Xcinau188 were then established, with the distance 3.75 cM, 1.26 cM and 0.98 cM respectively. Authenticity verification of the linkage between Pm21 and molecular markers were tested via F_{2: 3} families and results showed that the three markers were reliable new markers linked to Pm21. The results above would facilitate molecular marker-assisted selection in breeding program.

Keywords

Pm21; Preferred small group (PSG); Molecular tagging; EST-SSR; STS