However, there are numerous claimed lesser QTLs leading to stripe corrosion resistance towards the chromosome 2B (Lan ainsi que al
QYr.lrdc-2B.1, QYr.lrdc-2B.2, QYr.lrdc-2B.3 and QYr.lrdc-2B.4 were mapped on the long arm of chromosome 2B, each identified in a single environment and explained less than 10% of phenotypic variation (Table 3). The long arm of wheat chromosome 2B is rich with many stripe rust resistance genes such as Yr5, Yr7, Yr43, Yr44, Yr53 and Yr72 (Wang and Chen 2017 ). All our identified QTLs on chromosome 2B were derived from the resistant parent ‘AAC Innova’, indicating that they might relate to one of these single genes. However, the lesbian hookup near me phenotypic variation explained (<10%) by all individual 2B loci detected in this study suggests that the identified loci are different from those previously reported on the long arm of chromosome 2B, which have been reported to provide greater resistance than observed for individual QTLs in this study. spelta derived seedling resistance gene Yr5 on chromosome 2B, was highly resistant across environments (Table 2) in this study. There is no known or published report of introgression of Yr5 from spelt wheat or derived line into the parentage of ‘AAC Innova', suggesting that Yr5 could not be the source of resistance for all of the 2B loci identified in this study. 2010 ; Singh et al. 2014 ; Hou et al. 2015 ; Bokore et al. 2017 ). Based on consensus genetic maps (Wang et al. 2014 ; Maccaferri et al. 2015 ), the flanking markers of QTLs reported in these studies are positioned far away (>10-100 cM) from the flanking markers of our QTLs, suggesting that our reported QTLs are likely new and different from those previously reported on the long arm of chromosome 2B.
QYr.lrdc-5A, mapped on chromosome 5A, try the next extremely steady QTL inside our analysis, identified inside four regarding four environment and you will accounted for 5–7% regarding phenotypic adaptation (Dining table step 3). Brand new QTL interval try flanked of the SNP markers CAP7_c4064_162 and you will Kukri_c16087_281 (Fig. 3; Secondary Table S2). There are several training giving support to the visibility of minor impact QTLs towards chromosome 5A (Rosewarne ainsi que al. 2012 ; Buerst ). There is certainly a chance you to QYr.lrdc-5A and you may QYrdr.wgp.5AL acquiesced by Hou et al. ( 2015 ) may be the same, according to opinion genetic charts produced by Maccaferri et al. ( 2015 ) and you will Wang et al. ( 2014 ); SNP marker wsnp_Ex_c20899_30011827 closely in the QYrdr.wgp.5AL can be found dos cM and you may step 3 cM from our very own flanking marker Kukri_c16087_281 correspondingly. QYrdr.wgp.5AL explained dos.27–% phenotypic adaptation (Hou mais aussi al. 2015 ), and this is much like QYr.lrdc-5A.
Lesser perception QTLs for the chromosome 7D have been thought simply in a few studies (Basnet ainsi que al
QYr.lrdc-7D, based on new prone moms and dad ‘AAC Proclaim’, is known in two individual surroundings (Lethbridge 2016 and you can Creston 2020), where it accounted for 5% and you will seven% of one’s phenotypic adaptation, correspondingly (Desk 3). 2014 ). However, numerous education claimed the existence of the brand new Lr34/Yr18 gene on short-arm away from chromosome 7D (Lu mais aussi al. 2009 ; Yuan ainsi que al. 2018 ). Randhawa ainsi que al. ( 2012 ) stated that all Canadian wheat cultivars carry the fresh Lr34/Yr18 gene. not, the phenotypic effect of QYr.lrdc-7D isn’t typical of the Lr34/Yr18 because it shown simply lesser (5–6%) phenotypic variation and you can produced from vulnerable moms and dad ‘AAC Proclaim’, that is not supposed to hold new Lr34/Yr18 gene.
QYr.lrdc-2D, contributed by vulnerable moms and dad ‘AAC Proclaim’, is actually identified just regarding the Lethbridge 2020 ecosystem and you can pooled analysis, where it shared cuatro% of phenotypic type and you can was closely of this SNP marker wsnp_JD_rep_c63957_40798083 (Dining table 3). You will find several previous education revealing stripe corrosion opposition QTLs toward chromosome 2D (Lu mais aussi al. 2009 ; Agenbag ainsi que al. 2012 ; Lan ainsi que al. 2014 ; Ren mais aussi al. 2015 , 2017 ). All these QTLs was basically introduce towards the short arm of chromosome 2D such as for instance QYr.lrdc-2D. But not, irrespective of the mapping on the same chromosome arm, the fresh new physical reputation (21–22 Mb) out of QYr.lrdc-2D (Table step 3) doesn’t convergence having some of the QTLs on IWGSC RefSeq v1.0, recommending it would be unlike these QTLs.
Recent Comments