Quantitative trait loci associated with agronomic traits and stripe rust in winter wheat mapping population using single nucleotide polymorphic markers

2017 ◽  
Vol 37 (8) ◽  
Author(s):  
Ma Yu ◽  
Hong Zhang ◽  
Xin-Li Zhou ◽  
Da-Bin Hou ◽  
Guo-Yue Chen
PLoS ONE ◽  
2016 ◽  
Vol 11 (8) ◽  
pp. e0160623 ◽  
Author(s):  
Enid Perez-Lara ◽  
Kassa Semagn ◽  
Hua Chen ◽  
Muhammad Iqbal ◽  
Amidou N’Diaye ◽  
...  

Euphytica ◽  
2016 ◽  
Vol 213 (1) ◽  
Author(s):  
Hung Quoc Dao ◽  
Patrick F. Byrne ◽  
Scott D. Reid ◽  
Scott D. Haley

2019 ◽  
Vol 109 (7) ◽  
pp. 1226-1235 ◽  
Author(s):  
Lu Liu ◽  
Meinan Wang ◽  
Junyan Feng ◽  
Deven R. See ◽  
Xianming Chen

Winter wheat cultivar Eltan has been one of the most widely grown cultivars in the U.S. Pacific Northwest. It has shown variable levels of resistance to stripe rust in different years since it was released in 1990. To map all currently effective and defeated resistance genes in Eltan and understand the factors causing the resistance changes, 112 F2:5 recombinant inbred lines (RILs) were developed from a cross of Eltan with cultivar Avocet S. The RILs were evaluated in fields of Pullman, Washington in 2015, 2016, 2017, and 2018 and Mount Vernon, Washington in 2016 and 2017 under natural infections; they were also evaluated in the greenhouse with races PSTv-4 and PSTv-40 of Puccinia striiformis f. sp. tritici. The RILs were genotyped with the 90K Illumina iSelect wheat single-nucleotide polymorphism chip. A total of five quantitative trait loci (QTLs) were identified in Eltan. Two major QTLs on chromosome arms 2BS and 4AL were detected in the greenhouse tests, explaining up to 28.0 and 42.0% of phenotypic variation, respectively. The two race-specific QTLs were also detected in some field experiments but with reduced effects. A minor QTL on 5BS was detected in the greenhouse and field tests, explaining 10.0 to 14.8% of the phenotypic variation. The other two minor QTLs were mapped on 6AS and 7BL and detected only in field experiments, explaining up to 20.5 and 13.5% of phenotypic variation, respectively. All stripe rust samples collected in the experimental fields in 2015 and 2016 were identified as P. striiformis f. sp. tritici races virulent on seedlings of Eltan. The resistance reduction of Eltan was caused by changes of the P. striiformis f. sp. tritici population from avirulent to virulent, overcoming the race-specific all-stage resistance in Eltan.


Agronomy ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 133 ◽  
Author(s):  
Walid El-Feki ◽  
Patrick Byrne ◽  
Scott Reid ◽  
Scott Haley

Due to variable moisture conditions in the U.S. Great Plains, it is important to understand genetic control of crop traits under a range of soil moisture levels. Our objective was to identify quantitative trait loci (QTL) for yield, phenology, and morphological traits in wheat (Triticum aestivum L.) under different soil moisture conditions. Field evaluation of a winter wheat doubled haploid population (n = 185) derived from a cross between CO940610 and ‘Platte’ was carried out in Fort Collins and Greeley, Colorado, USA in 2007–2008 and 2008–2009, respectively. At each location, trials were grown under moderate drought stress and fully irrigated conditions. A total of 33 QTL for 11 traits was detected in two or more environments. A cluster of QTL for nine traits was found on chromosome 2B in the vicinity of the photoperiod response gene Ppd-B1. Other stable QTL clusters were detected on chromosome 6A and near the vernalization response gene Vrn-D3 on chromosome 7D. A QTL for grain yield on chromosome 5A was detected in three environments. With minor exceptions, the large-effect QTL were detected in both the water limited and fully irrigated environments, rather than being detected only under specific moisture levels.


2002 ◽  
Vol 106 (6) ◽  
pp. 961-970 ◽  
Author(s):  
L. Gervais ◽  
F. Dedryver ◽  
J.-Y. Morlais ◽  
V. Bodusseau ◽  
S. Negre ◽  
...  

Author(s):  
Régine Delourme ◽  
Anne Laperche ◽  
Anne-Sophie Bouchet ◽  
Mélanie Jubault ◽  
Sophie Paillard ◽  
...  

2011 ◽  
Vol 47 (Special Issue) ◽  
pp. S43-S48 ◽  
Author(s):  
A. Börner ◽  
K. Neumann ◽  
B. Kobiljski

It is estimated that world-wide existing germplasm collections contain about 7.5 million accessions of plant genetic resources for food and agriculture. Wheat (Triticum and Aegilops) represents the biggest group comprising 900 000 accessions. However, such a huge number of accessions is hindering a successful exploitation of the germplasm. The creation of core collections representing a wide spectrum of the genetic variation of the whole assembly may help to overcome the problem. Here we demonstrate the successful utilisation of such a core collection for the identification and molecular mapping of genes (Quantitative Trait Loci) determining the agronomic traits flowering time and grain yield, exploiting a marker-trait-association based technique. Significant marker-trait associations were obtained and are presented. The intrachromosomal location of many of these associations coincided with those of already identified major genes or quantitative trait loci, but others were detected in regions where no known genes have been located to date.


Crop Science ◽  
1999 ◽  
Vol 39 (6) ◽  
pp. 1652-1657 ◽  
Author(s):  
J. H. Orf ◽  
K. Chase ◽  
F. R. Adler ◽  
L. M. Mansur ◽  
K. G. Lark

2013 ◽  
Vol 33 (2) ◽  
pp. 249-265 ◽  
Author(s):  
Elsayed Mansour ◽  
Ana M. Casas ◽  
M. Pilar Gracia ◽  
José Luis Molina-Cano ◽  
Marian Moralejo ◽  
...  

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