Novel QTL for Stripe Rust Resistance on Chromosomes 4A and 6B in Soft White Winter Wheat Cultivars
| Autor: | Xianming Chen, Arron H. Carter, Emily Klarquist |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
QTL mapping
0106 biological sciences 0301 basic medicine disease resistance Population Triticum aestivum Puccinia striiformis f. sp. tritici Single-nucleotide polymorphism Quantitative trait locus Biology Plant disease resistance 01 natural sciences lcsh:Agriculture 03 medical and health sciences Genetic linkage plant breeding Cultivar Plant breeding education Genetics education.field_of_study lcsh:S food and beverages White (mutation) 030104 developmental biology Agronomy Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Agronomy; Volume 6; Issue 1; Pages: 4 Agronomy, Vol 6, Iss 1, p 4 (2016) |
| ISSN: | 2073-4395 |
| DOI: | 10.3390/agronomy6010004 |
| Popis: | Stripe rust (caused by Puccinia striiformis f. sp. tritici) of wheat (Triticum aestivum) is a devastating disease in temperate regions when susceptible varieties are grown and environmental conditions sustain high disease pressures. With frequent and severe outbreaks, disease resistance is a key tool for controlling stripe rust on wheat. The goal of this research was to identify quantitative trait loci (QTL) involved in stripe rust resistance from the important US Pacific Northwest soft white winter wheat varieties “Eltan” and “Finch”. An F2:5 recombinant inbred line (RIL) mapping population of 151 individuals derived from the Finch × Eltan cross was developed through single seed descent. A linkage map comprising 683 unique single nucleotide polymorphism (SNP) loci and 70 SSR markers were used to develop 22 linkage groups consisting of 16 of the 21 chromosomes. Stripe rust data were collected on the RILs during the summers of 2012 to 2014. QTL analysis identified two genomic regions on chromosomes 4A (QYrel.wak-4A) and 6B (QYrfi.wak-6B) associated with resistance from Eltan and Finch, respectively. The results of the QTL analysis showed that QYrel.wak-4A and QYrfi.wak-6B reduced infection type and disease severity. Based upon both molecular and phenotypic differences, QYrel.wak-4A is a novel QTL for adult plant resistance (APR) to stripe rust. |
| Databáze: | OpenAIRE |
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