X Triticosecale Wittmack

Backcrossing to increase meiotic stability in triticale

R. M. Giacomin, Assis, R., Brammer, S. P., A. Junior, N., and Da-Silva, P. R., “Backcrossing to increase meiotic stability in triticale”, vol. 14, pp. 11271-11280, 2015.

Triticale (X Triticosecale Wittmack) is an intergeneric hybrid derived from a cross between wheat and rye. As a newly created allopolyploid, the plant shows instabilities during the meiotic process, which may result in the loss of fertility. This genomic instability has hindered the success of triticale-breeding programs. Therefore, strategies should be developed to obtain stable triticale lines for use in breeding. In some species, backcrossing has been effective in increasing the meiotic stability of lineages.

Molecular cytogenetic characterization of a new leaf rolling triticale

E. N. Yang, Yang, Z. J., Zhang, J. F., Zou, Y. C., and Ren, Z. L., “Molecular cytogenetic characterization of a new leaf rolling triticale”, vol. 10, pp. 2953-2961, 2011.

Leaf rolling occurs in some cereal genotypes in response to drought. We identified and made a phenotypic, cytological and physiological analysis of a leaf-rolling genotype (CMH83) of hexaploid triticale (X Triticosecale Wittmack) that exhibited reduced plant height, rolled and narrow leaves. Gliadin electrophoresis of seed protein showed that CMH83 was genetically stable. Sequential Giemsa-C-banding and genomic in situ hybridization showed that CMH83 contains 12 rye chromosomes; two pairs of these chromosomes have reduced telomeric heterochromatin bands.