Abstract
Stripe rust,caused by Puccinia striiformis West.f.sp.tritici,is one of the most damaging diseases of wheat (Triticum aestivum L.) worldwide.Application of resistant varieties has been considered as the most economical and environment-friendly approach to control the disease.Resistance to stripe rust is frequently overcome by the pathogen due to the emergence of new virulent races.Wheat cultivar Shaanmai 139 is resistant to all current Chinese epidemic races of P.striiformis f.sp.tritici,CYR29,CYR30,CYR31,CYR32,and CYR33.Based on the monosomic genetic analysis,here,we reported the characterization and molecular marker of stripe rust resistance genes to CYR32 in Shaanmai 139.We screened 442 F2 plants derived from two crosses between Shaanmai 139 and two susceptible cultivars Abbondanza and Huixianhong,respectively.The results showed the ratios of the resistant to the susceptible of F2 population from Shaanmai 139×Abbondanza and Shaanmai 139×Huixianhong were 203:16 and 210:13 respectively,corresponding to 15:1 (χ2 is 0.26 and 0.02,χ20.05,1=3.84).Monosomic analysis showed the ratios deviated from 15:1 in the F2 plants of Shaanmai 139×Abbondaza 1BN and Shaanmai 139×Abbondaza 2DN,while the others ratios corresponded to 15:1.Thus,two resistance loci in Shaanmai 139 were found on chromosomes 1B and 2D,tentatively designated YrSM139-1B and YrSM139-2D,respectively,according to the analysis of 21 monosomic and nullsomic lines of the cultivar Abbondanza and SSR mapping results.One SSR marker,Xgwm273,was closely linked to YrSM139-1B in the F2 population.SSR mapping results showed that YrSM139-1B derived from a T.dicoccoides accession,AS846.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
