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Article
Molecular map** of the rust resistance gene R 4 to a large NBS-LRR cluster on linkage group 13 of sunflower
Rust is a serious fungal disease in the sunflower growing areas worldwide with increasing importance in North America in recent years. Several genes conferring resistance to rust have been identified in sunflo...
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Article
A novel Robertsonian translocation event leads to transfer of a stem rust resistance gene (Sr52) effective against race Ug99 from Dasypyrum villosum into bread wheat
Stem rust (Puccinia graminis f. sp. tritici Eriks. & E. Henn.) (the causal agent of wheat stem rust) race Ug99 (also designated TTKSK) and its derivatives have defeated several important stem rust resistance gene...
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Article
Molecular cytogenetic characterization of alien introgressions with gene Fhb3 for resistance to Fusarium head blight disease of wheat
Fusarium head blight (FHB) resistance was identified in the alien species Leymus racemosus, and wheat-Leymus introgression lines with FHB resistance were reported previously. Detailed mol...
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Article
A strategy for enhancing recombination in proximal regions of chromosomes
As a rule, recombination in bread wheat (Triticum aestivum L.) is low in proximal and high in distal regions of chromosomes. Recombination may be enhanced in proximal regions by using deletion (del) chromosomes d...
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Article
High-density physical maps reveal that the dominant male-sterile gene Ms3 is located in a genomic region of low recombination in wheat and is not amenable to map-based cloning
In wheat it is essential to know whether a gene is located in a high or low recombination region of the genome before initiating a map-based cloning approach. The objective of this study was to explore the pot...
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Article
Recombination in an isochromosome preferentially occurs between cis isochromatids
An isochromosome has identical arms attached to the same centromere. At the pachytene stage of meiosis, it has four isochromatids and recombination can occur either between cis isochromatids (attached to the sam...
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Article
Development of a complete set of Triticum aestivum-Aegilops speltoides chromosome addition lines
Aegilops speltoides Tausch (2n = 2x = 14, SS) is considered as the closest living relative of the B and G genomes of polyploid wheats. A complete set of Triticum aestivum L. cv Chinese Spring-Ae. speltoides whol...
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Article
Molecular cytogenetic identification of wheat-Elymus tsukushiense introgression lines
Elymus tsukushiense Honda (syn. Roegneria kamoji C. Koch) (2n = 6x = 42, StsStsHtsHtsYtsYts) is a hexaploid species, distantly related to bread wheat Triticum aestivum L. em Thell (2n = 6x = 42, AABBDD). Apart fr...
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Article
Identification and physical map** of three Haynaldia villosa chromosome-6V deletion lines
Three deletion lines (del6V?2S-1, del6V? 2L-1, and del6V?2L-2) of Haynaldia villosa chromosome 6V added to wheat were identified by C-banding and characterized by RFLP analyses. The breakpoints were located at f...
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Article
Molecular cytogenetic analysis of Leymus racemosus chromosomes added to wheat
Five disomic, two double-disomic, and two ditelosomic addition lines and one disomic substitution line derived from the crosses of Triticum aestivum (2n=6x=42, AABBDD)×Leymus racemosus (2n= 4x=28, JJNN) were ide...
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Article
Development and molecular cytogenetic analysis of wheat-Haynaldia villosa 6VS/6AL translocation lines specifying resistance to powdery mildew
Several Triticum aestivum L.-Haynaldia villosa disomic 6VS/6AL translocation lines with powdery mildew resistance were developed from the hybridization between common wheat cultivar Yangmai 5 and alien substituti...
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Article
Isolation, characterization and application of a species-specific repeated sequence from Haynaldia villosa
A species-specific repeated sequence, pHvNAU62, was cloned from Haynaldia villosa, a wheat relative of great importance. It strongly hybridized to H. villosa, but not to wheat. In situ hybridization localized thi...
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Article
Synaptonemal complex pairing and metaphase I association in a telo-substituted telotrisomic of rye (Secale cereale L.)
The synaptonemal complexes in pollen mother cells (PMCs) of rye in which one chromosome 1R was replaced by the two corresponding telocentrics, and where one additional telocentric 1RS was present, showed appro...
