Report of the 2012 Uniform Regional Scab Nursery for Spring Wheat Parents

Coordinator: David F. Garvin

USDA-ARS, Plant Science Research Unit

411 Borlaug Hall, University of Minnesota

1991 Upper Buford Circle, St. Paul, MN 55108

Report prepared by: David F. Garvin and Zachary Blankenheim

The Uniform Regional Scab Nursery for Spring Wheat Parents (URSN) was grown for the 18th year in 2012. Four locations at Brookings, SD, St. Paul and Crookston, MN, and Glenlea, Manitoba, Canada were planted.

A total of 25 entries were included in the 2012 URSN, including the resistant checks 2375, BacUp, and ND2710, and the susceptible checks Wheaton and Oslo. The other entries were contributed by 5 university and government breeding programs.

A core set of traits evaluated provided from most locations included FHB incidence, FHB severity, disease index (incidence x severity), and visual scabby kernel ratings (VSK  tombstone  FDK). Additional trait data such as grain deoxynivalenol content, yield, and heading date, are presented in individual location summary tables where they were measured. Overall means for traits over locations are presented, as are relative rankings for incidence, severity, disease index, VSK and DON. Correlation coefficients are provided between incidence, severity, disease index, and VSK. Molecular marker genotypes for a set of FHB resistance QTLs and other traits are provided for entries. Adult plant leaf and stem rust reactions are also presented.

This material is based upon work supported by the U.S. Department of Agriculture, in cooperation with the U.S. Wheat & Barley Scab Initiative. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors and do not necessarily reflect the view of the U.S. Department of Agriculture.

St. Paul, MN

March, 2013

CONTENTS PAGE

Cooperating Agencies, Stations and Personnel 1

Table 1. List of Entries in the 2012 URSN 2

Tables 2-5. Nursery Data by Individual Location 3-6

Table 6. Trait Means Across Locations, with Rankings 7

Table 7. Correlations Between Traits, by Location 8

Table 8. Correlations Between Traits Across Locations 9

Table 9. Adult Plant Leaf and Stem Rust Reactions 10

Table 10. Molecular Marker Genotypes for Selected Genes and Traits 11-12

Cooperators for the 2012 Uniform Regional Scab Nursery for Spring Wheat Parents

South Dakota State University (Brookings):

Karl Glover

University of Minnesota (St. Paul, Crookston):

Jim Anderson, Ruth Dill-Macky, and John Wiersma

Agri-Food Canada, Glenlea, Manitoba:

Jeannie Gilbert and Gavin Humphreys

USDA-ARS, Cereal Crops Research Unit (Fargo, ND):

Shiaoman Chao

USDA-ARS, Cereal Disease Laboratory (St. Paul, MN):

Jim Kolmer, Yue Jin