Registration of KUWNSr, a wheat stem rust nested association mapping population

Prabin Bajgain, Yue Jin, Toi J. Tsilo, Godwin K. Macharia, Susan E. Reynolds, Ruth Wanyera, James A. Anderson

Research output: Contribution to journalArticlepeer-review

Abstract

A spring wheat nested associated mapping (NAM) population, KUWNSr (Kenyan and U.S. wheat nested association mapping population for stem rust resistance), was developed at the University of Minnesota, St. Paul, MN, USA. KUWNSr (Reg. no. MP-12, NSL 533796 MAP, experimental designation SrNAM) was primarily developed to genetically characterize stem rust resistance as the 10 male parents—nine Kenyan and one University of Minnesota wheat cultivars—exhibited medium to high adult plant resistance to African and North American races of the stem rust pathogen (Puccinia graminis f. sp. tritici). Each parent was crossed to the stem rust susceptible line LMPG-6, and populations were developed via single-seed descent. Aggregately, the resulting 10 populations, consisting of 852 recombinant inbred lines, formed the KUWNSr population. KUWNSr was evaluated in four environments: two in the United States and one each in Kenya and South Africa. A high-density genetic map was developed using genotyping-by-sequencing, resulting in 11,221 single nucleotide polymorphism markers mapped to all 21 chromosomes. In addition to stem rust resistance, the population segregates for other disease resistance traits such as leaf and stripe rust and agronomic traits such as plant height, spike morphology, and days to heading. As one of the first wheat NAM populations developed, KUWNSr is a valuable resource for understanding the genetic architecture of wheat growth and development, morphology, and resistance or tolerance to biotic and abiotic stresses.

Original languageEnglish (US)
Pages (from-to)467-473
Number of pages7
JournalJournal of Plant Registrations
Volume14
Issue number3
DOIs
StatePublished - Sep 1 2020

Bibliographical note

Funding Information:
We thank University of Minnesota Genomics Center and Minnesota Supercomputing Institute for computing support, and the Microbial & Plant Genomics Institute, Kenya Agricultural and Livestock Research Organization, Ethiopia Institute of Agricultural Research, Agricultural Research Council of South Africa, and USDA?ARS Cereal Disease Laboratory for assistance with field trials and phenotyping. Particularly, we would like to thank Drs. Matthew N. Rouse (USDA?ARS) and Sridhar Bhavani (CIMMYT) for participating in the evaluation of this NAM population against stem rust. We are grateful to the University of Minnesota Spring Wheat Breeding Project personnel for their help and support during various phases of the project, including field trials and population development. Funding for this work was provided by the USDA Agriculture and Food Research Initiative and 2011-68002-30029 (Triticeae Coordinated Agricultural Project), and the Borlaug Global Rust Initiative Durable Rust Resistance in Wheat Project that was administered by Cornell University with a grant from the Bill & Melinda Gates Foundation and the UK Department for International Development.

Funding Information:
We thank University of Minnesota Genomics Center and Minnesota Supercomputing Institute for computing support, and the Microbial & Plant Genomics Institute, Kenya Agricultural and Livestock Research Organization, Ethiopia Institute of Agricultural Research, Agricultural Research Council of South Africa, and USDA–ARS Cereal Disease Laboratory for assistance with field trials and phenotyping. Particularly, we would like to thank Drs. Matthew N. Rouse (USDA–ARS) and Sridhar Bhavani (CIMMYT) for participating in the evaluation of this NAM population against stem rust. We are grateful to the University of Minnesota Spring Wheat Breeding Project personnel for their help and support during various phases of the project, including field trials and population development. Funding for this work was provided by the USDA Agriculture and Food Research Initiative and 2011‐68002‐30029 (Triticeae Coordinated Agricultural Project), and the Borlaug Global Rust Initiative Durable Rust Resistance in Wheat Project that was administered by Cornell University with a grant from the Bill & Melinda Gates Foundation and the UK Department for International Development.

Publisher Copyright:
© 2020 The Authors. Journal of Plant Registrations © 2020 Crop Science Society of America

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

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