NDLI: Molecular cytogenetics of Alstroemeria: identification of parental genomes in interspecific hybrids and characterization of repetitive DNA families in constitutive heterochromatin

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Molecular cytogenetics of Alstroemeria: identification of parental genomes in interspecific hybrids and characterization of repetitive DNA families in constitutive heterochromatin

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Molecular cytogenetics of Alstroemeria: identification of parental genomes in interspecific hybrids and characterization of repetitive DNA families in constitutive heterochromatin

Content Provider	Springer Nature Link
Author	Kuipers, Anja G. J. van Os, Diana P. M. de Jong, J. Hans Ramanna, M. S.
Copyright Year	1997
Abstract	The genus Alstroemeria consists of diploid(2n=2x=16) species originating mainly from Chile and Brazil. Most cultivars are triploid or tetraploid interspecific hybrids. C-banding of eight species revealed obvious differentiation of constitutive heterochromatin within the genus. The present study focused on the molecular (cyto)genetic background of this differentiation. Genomic slot-blot analysis demonstrated strong conservation of major parts of the genomes among six species. The chromosomes of A. aurea and A. ligtu, species with pronounced interstitial C-bands, were found to contain large amounts of highly repetitive and species-specific DNA. The variation in size,number and intensity of strongly probed bands of major repetitive DNA families observed in genomic Southern blots of Sau3A, HaeIII, and MseI digests indicated a strong correlation between variation in genomic DNA composition and different C-banding patterns among Alstroemeria species. Genomic in situ hybridization (GISH)revealed a clear distinction between parental chromosomes in the hybrids between Chilean and Brazilian species and also between Chilean species, as long as at least one of the parental species possessed prominent C-banding. Regarding the latter, discriminative hybridization resulted from highly repetitive species specific DNA in the heterochromatic chromosome regions of A. aurea and A. ligtu, and caused GISH banding patterns that coincided with the C-banding patterns.
Starting Page	31
Ending Page	39
Page Count	9
File Format	PDF
ISSN	09673849
Journal	Chromosome Research
Volume Number	5
Issue Number	1
e-ISSN	15736849
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1997-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Human Genetics Plant Genetics & Genomics Animal Genetics and Genomics
Content Type	Text
Resource Type	Article
Subject	Genetics

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