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Original Article

Molecular Cytogenetic Mapping of Satellite DNA Sequences in Aegilops geniculata and Wheat

Koo D.-H.a · Tiwari V.K.a · Hřibová E.b · Doležel J.b · Friebe B.a · Gill B.S.a

Author affiliations

aWheat Genetics Resource Center, Department of Plant Pathology, Throckmorton Plant Sciences Center, Kansas State University, Manhattan, Kans., USA; bInstitute of Experimental Botany, Center of the Region Haná for Biotechnological and Agricultural Research, Olomouc, Czech Republic

Related Articles for ""

Cytogenet Genome Res 2016;148:314-321

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Article / Publication Details

First-Page Preview
Abstract of Original Article

Accepted: April 29, 2016
Published online: July 13, 2016
Issue release date: August 2016

Number of Print Pages: 8
Number of Figures: 3
Number of Tables: 1

ISSN: 1424-8581 (Print)
eISSN: 1424-859X (Online)

For additional information: http://www.karger.com/CGR

Abstract

Fluorescence in situ hybridization (FISH) provides an efficient system for cytogenetic analysis of wild relatives of wheat for individual chromosome identification, elucidation of homoeologous relationships, and for monitoring alien gene transfers into wheat. This study is aimed at developing cytogenetic markers for chromosome identification of wheat and Aegilops geniculata (2n = 4x = 28, UgUgMgMg) using satellite DNAs obtained from flow-sorted chromosome 5Mg. FISH was performed to localize the satellite DNAs on chromosomes of wheat and selected Aegilops species. The FISH signals for satellite DNAs on chromosome 5Mg were generally associated with constitutive heterochromatin regions corresponding to C-band-positive chromatin including telomeric, pericentromeric, centromeric, and interstitial regions of all the 14 chromosome pairs of Ae. geniculata. Most satellite DNAs also generated FISH signals on wheat chromosomes and provided diagnostic chromosome arm-specific cytogenetic markers that significantly improved chromosome identification in wheat. The newly identified satellite DNA CL36 produced localized Mg genome chromosome-specific FISH signals in Ae. geniculata and in the M genome of the putative diploid donor species Ae. comosa subsp. subventricosa but not in Ae. comosa subsp. comosa, suggesting that the Mg genome of Ae. geniculata was probably derived from subsp. subventricosa.

© 2016 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Original Article

Accepted: April 29, 2016
Published online: July 13, 2016
Issue release date: August 2016

Number of Print Pages: 8
Number of Figures: 3
Number of Tables: 1

ISSN: 1424-8581 (Print)
eISSN: 1424-859X (Online)

For additional information: http://www.karger.com/CGR


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