Bains, N.S.Feltaous, Yousef Mohsen2017-06-032017-06-032015http://krishikosh.egranth.ac.in/handle/1/5810016038The study is based on near homozygous derivatives from three crosses: TL 2908/2*CSS//PBW 343; TL 2908/2*CSS//DBW 17 and TL 2908/2*CSS//PBW 550 where TL 2908 is an improved, amber grained triticale variety, CSS is a bread stock carrying Ph suppressor genes in Chinese Spring background and PBW 343, DBW 17 and PBW 550 are bread wheat varieties used as recipient parents. As all the recipient wheat varieties carried 1B/1R translocation, it was expected to be present in half of the derivatives. Out of 1244 lines screened using SSR marker diagnostic of 1B/1R translocation (SCM 9), 652 turned out to be non 1B/1R. The lines negative for 1B/1R translocation were screened for presence of rye chromatin using a universal marker (Rye R3/F3). A large proportion (266 out of 552 lines, 48.2%) was positive for rye chromatin. A set of 164 derivatives positive for rye chromosome introgression were taken up for evaluation in replicated trials. Transfer of large anther size and high anther extrusion was indicated in several derivatives, which is relevant for hybrid wheat development. Sixty five derivatives showing almost complete resistance to highly virulent stripe rust race 78S84 were evaluated in a separate trial. While all the recipient bread wheat parents were highly susceptible to stripe rust and Karnal bunt, twelve derivative lines combined high level of resistance to stripe rust (mostly 0 or ts) and Karnal bunt (less than 2% infection). Another three lines were found to be highly tolerant to micronutrient deficiency. SSR marker based screening of elite derivatives revealed three lines to carry rye chromosome 5 (and three lines with rye chromosome 6. One line carried both chromosomes 5R and 6R.enwheats, cereals, chromosomes, crossing over, diseases, planting, genetics, sets, developmental stages, grainThesis