title: Molecular cytogenetic  characterization of a new leaf rolling triticale.
abstract: 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. Tests of relative water content and  water loss rate of leaves of CMH83 compared with those of wheat cultivars  indicated that rapid water loss after drought stress in CMH83 is associated  with the leaf rolling phenotypes. Leaf rolling in CMH83 was a dominant trait in  our inheritance studies. Triticale line CMH83 could be used to study drought  resistance mechanisms in triticale.
authors.affiliation: State Key Laboratory for Plant Genetics and Breeding, Sichuan Agricultural University, Yaan, China.
authors.forename: E N
authors.initials: EN
authors.lastname: Yang
authors.forename: Z J
authors.initials: ZJ
authors.lastname: Yang
authors.forename: J F
authors.initials: JF
authors.lastname: Zhang
authors.forename: Y C
authors.initials: YC
authors.lastname: Zou
authors.forename: Z L
authors.initials: ZL
authors.lastname: Ren
mesh_terms: D032461:Chromosomes, Plant / Q000737:chemistry / Q000235:genetics*; D055864:Droughts; D004591:Electrophoresis, Polyacrylamide Gel; D042822:Genomic Instability; D005838:Genotype; D005903:Gliadin / Q000235:genetics* / Q000378:metabolism; D006570:Heterochromatin / Q000235:genetics; D017403:In Situ Hybridization; D010641:Phenotype; D018515:Plant Leaves / Q000235:genetics*; D011003:Ploidies; D012434:Secale / Q000235:genetics*; D012639:Seeds / Q000235:genetics*; D016615:Telomere / Q000235:genetics; D014908:Triticum / Q000235:genetics; D014867:Water
chemical_list: D006570:Heterochromatin; D014867:Water; D005903:Gliadin