Molecular cytogenetic analysis of newly developed progenies from triticale × wheat crosses for yield and stress tolerance.

A total of 139 triticale × wheat progenies (including recombinant inbred lines and doubled haploids) were developed indigenously. Screening at cytogenetic level using genomic in situ hybridization and fluorescence in situ hybridization revealed maximum progenies (48%) carrying 1RS.1BL translocation. D-R genome substitution ranging from 1 to 7 chromosomes of rye showed significantly more biological yield (9.29 g), 1000 grain weight (48.26 g), number of tillers per plant (6.67) and plant height (106.06 cm) than other progenies depicting the contribution of rye chromatin towards plant yield. Thirteen per cent of lines were found without rye chromatin. Screening of all progenies against yellow rust pathogen revealed about 85% lines to be resistant with varying levels of resistance. In vitro testing for drought tolerance showed non-significant difference among progenies carrying variable rye introgressions. The progenies developed in the present study may present novel germplasm and utilized in the future wheat improvement programmes. [ABSTRACT FROM AUTHOR]