Identification and phenotypic description of new wheat – six-rowed winter barley disomic additions

• Published in: Genome Vol. 55; no. 4; pp. 302 - 311
• Main Authors: Molnár-Láng, Márta, Kruppa, Klaudia, Cseh, András, Bucsi, Julianna, Linc, Gabriella
• Format: Journal Article
• Language: English
• Published: Canada NRC Research Press 01.04.2012; Canadian Science Publishing NRC Research Press
• Subjects: Barley; Chromosomes, Plant; Crosses, Genetic; Deoxyribonucleic acid; DNA; Fluorescence in situ hybridization; Genetic aspects; Genomics; Hordeum - genetics; Hordeum vulgare; hybridation in situ; in situ hybridization; lignées d’addition blé–orge; marqueurs SSR; Morphology; Phenotype; Physiological aspects; Plant genetics; Repetitive Sequences, Nucleic Acid; SSR markers; Triticum - genetics; Triticum aestivum; Wheat; wheat–barley addition lines; Hungary
• ISSN: 0831-2796; 1480-3321
• DOI: 10.1139/g2012-013

To increase the allelic variation in wheat–barley introgressions, new wheat–barley disomic addition lines were developed containing the 2H, 3H, 4H, 6H, and 7H chromosomes of the six-rowed Ukrainian winter barley ‘Manas’. This cultivar is agronomically much better adapted to Central European environmental conditions than the two-rowed spring barley ‘Betzes’ previously used. A single ‘Asakaze’ × ‘Manas’ wheat × barley hybrid plant was multiplied in vitro and one backcross plant was obtained after pollinating 354 regenerant hybrids with wheat. The addition lines were selected from the self-fertilized seeds of the 16 BC 2 plants using genomic in situ hybridization. The addition lines were identified by fluorescence in situ hybridization using repetitive DNA probes (HvT01, GAA, pTa71, and Afa family), followed by confirmation with barley SSR markers. The addition lines were grown in the phytotron and in the field, and morphological parameters (plant height, fertility, tillering, and spike characteristics) were measured. The production of the disomic additions will make it possible to incorporate the DNA of six-rowed winter barley into the wheat genome. Addition lines are useful for genetic studies on the traits of six-rowed winter barley and for producing new barley dissection lines.