| 4. Of the three T. aestivum lines, the reaction pattern on CI 12632
(SrTt1) and Timvera (SrTt1) was identical except that Timvera
was found resistant to the strain 21A-1 to which CI 12632 is susceptible
(IT 3). This observation suggests that perhaps Timvera carries an additional
factor(s) effective to strain 21A-1, an Indian sub-biotype of race 21. 5. In the regular Rust Secreening Nurseries, CI 12632 showed a fair degree of resistance to both the stem and leaf rusts at the adult stage which perhaps is due to some additional factor(s) operative at the adult stage. The use of this line in breeding rust resistant cultivars is suggested. Literature Cited MCINTOSH, R.A. and J, GYARFAS 1971 Trticum temopheevi as a source of resistance to wheat stem rust. Z. Pflanzenzuchtg 66 : 240-248. STAKMAN, E.C. and M.N. LEVINE 1922. The determination of biologic forms of Puccinia graminis on Triticum spp. Minn. Univ. Agr. Expt. Sta. Tech. Bull. 8. WATSON, I.A and N.H LUIG 1968. The ecology of genetics of host pathogen relationships in wheat rusts in Australia. Third Int. Wheat Genet. Symp., Canberra 5-9 Aug., 1968. |
| <-- Back |