Abstract
Five new or locally unexploited Lr genes were evaluated as sources of resistance to leaf rust (Puccinia recon- dita Rob. ex Desm. f. sp. tritici) of wheat (Triticum aestivum L.) in South Africa. The expression of Lr36, Lr41 and Lr42, as well as the provisionally named genes 'Lr39 and ‘Lr40’, their reaction to different temperatures and inheritance in two South African wheat cultivars were determined. Lr36 in line C78.10 was more effective at higher temperatures whereas Lr39 (line KS86WGRC02) and Lr40 (line KS89WGRC07) conferred lower infection types at 15°C than at 25°C. Except for more pronounced flecking at 15°C, temperature had no detectable effect on the expression of Lr41 in line KS90WGRC10. An interaction between temperature and pathotype showed that Lr42 in line KS91WGRC11 was less effective to certain pathotypes at lower temperatures. According to seedling infection types in the F2 and BC2F1, Lr36, Lr39 and Lr40 were inherited as partially dominant genes in Karee and Palmiet. With these background...
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.
