Abstract
With 4 figures and 2 tables Abstract Sclerotinia stem rot caused by Sclerotinia sclerotiorum is one of the most severe diseases of rapeseed in China and other major growing regions. The objective of this study was to improve the S. sclerotiorum resistance of ‘Hui5200’, an elite ‘Polima’ CMS restorer line, by introgression and fixation of resistance alleles from the partially resistant cultivar ‘NingRS-1’ via phenotypic selection (PS), marker-assisted background selection (MAB) and microspore culture. A progeny designated as ‘RSH’ with greatly improved Sclerotinia resistance and a similar genetic background as ‘Hui5200’ was obtained by two backcrosses and one selfing. From a selected elite progeny line (named as 7-5) double haploid (DH) lines were developed. By three cycles of PS considering economic traits and genetic distance analysis, four resistant DH restorer lines with elite economic traits were finally selected. The obtained resistant restorer lines have been used to produce commercial F1 hybrids. The results indicated that backcrossing plus PS and MAB is effective and suitable for improving resistance of rapeseed to S. sclerotiorum.
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.
