Molecular cytological characterization of two novel durum –Thinopyrum intermedium partial amphiploids with resistance to leaf rust, stem rust and Fusarium head blight. Issue 1 (21st February 2013)

• Record Type: Journal Article
• Authors: Zeng, J.; Cao, W.; Fedak, G.; Sun, S.; Mccallum, B.; Fetch, T.; Xue, A.; Zhou, Y.
• Is Part Of: Hereditas. Volume 150:Issue 1(2013:Feb.)
• Page Start: 10
• Page End: 16
• Publication Date: 2013-02-21
• Subjects: Heredity -- Periodicals; Genetics -- Periodicals; Cytogénétique; Génétique; Hérédité; Périodique électronique (Descripteur de forme); Ressource Internet (Descripteur de forme); 576.5
• DOI: 10.1111/j.1601-5223.2012.02262.x
• Languages: English
• ISSNs: 0018-0661

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p> <italic>Thinopyrum intermedium</italic>, a wild relative of wheat, is an excellent source of disease resistance. Two novel partial amphiploids, 08‐47‐50 and 08‐53‐55 (2n = 6x = 42), were developed from wide crosses between durum wheat and <italic>Th. intermedium.</italic> Meiotic analysis showed that pollen mother cells of the two partial amphiploids formed an average 20.49 bivalents for 08‐47‐50 and 20.67 bivalents for 08‐53‐55, indicating that they are basically cytologically stable. GISH analysis revealed that the two partial amphiploids carried different chromosome compositions. 08‐47‐50 had fourteen chromosomes from <italic>Th. intermedium</italic> and its alien chromosomes included six St‐, four E^e‐ and four E^e‐St translocated chromosomes, whereas 08‐53‐55 had four St‐ and ten E^e‐St translocated chromosomes. Fungal disease evaluation indicated that both partial amphiploids had a high level of resistance to FHB, leaf rust and stem rust race Ug99. These two novel partial amphiploids with multiple disease resistance could be used as a new source of multiple disease resistance in bread wheat and durum wheat breeding programs.</p> </abstract>