NDLI: Possible ancient origin of heterochromatic JNK sequences in chromosomes 2R ofSecale vavilovii Grossh

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Journal of Applied Genetics : Volume 50

Journal of Applied Genetics : Volume 49

Journal of Applied Genetics : Volume 48

Journal of Applied Genetics : Volume 47

Possible ancient origin of heterochromatic JNK sequences in chromosomes 2R ofSecale vavilovii Grossh

Content Provider	Springer Nature Link
Author	Achrem, M. Rogalska, S. M. Kalinka, A.
Copyright Year	2010
Abstract	Employing FISH analysis as well as BLAST and CUSTAL W (1.82) programs, we investigated types of DNA nucleotide sequences building an additional heterochromatic band in 2R chromosomes of 3 lines ofSecale vavilovii Grossh. The probes used in FISH analysis were designed based on the reverse transcriptase sequence of Ty1-copia and Ty3-gypsy retrotransposons and the 5S rRNA gene sequence. No hybridization signals from the reverse transcriptase probes were observed in the chromosome region where the additional band occurs. On the other hand, signals were observed after hybridization with the 5S rDNA probe, clearly suggesting the presence of that type of sequences in the analyzed heterochromatin band. Using BLAST and CUSTAL W programs, we revealed high similarity of the JNK1 sequence to the 5S rRNA gene fromHordeum chilense (HCH1016, HCH1018, 88%) and to a fragment of the 5S rRNA sequence ofH. marinum (HMAR003, 97%). In addition, the same fragment of JNK1 was shown to be very similar to the part of theAngela retrotransposon (92%) as well as to theSNAC 426K20-1 transposon (89%) belonging to CACTA family, both fromTriticum monococcum, and toZingeria biebersteiniana pericentromeric sequences (78%). The similarity of JNK1 to those sequences may be accidental or the JNK1 may represent an ancient mobile genetic element that caught the 5S rRNA sequence. During the evolution those sequences might have been accumulated in the particular region on the 2R chromosome. Our results suggest that the additional heterochromatin band in chromosomes 2R ofS. vavilovii is a collection of defective genes and/or mobile genetic elements.
Starting Page	1
Ending Page	8
Page Count	8
File Format	PDF
ISSN	12341983
Journal	Journal of Applied Genetics
Volume Number	51
Issue Number	1
e-ISSN	21903883
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-01-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Secale vavilovii Grossh FISH 5S rDNA JNK retrotransposons reverse transcriptase Life Sciences Animal Genetics and Genomics Human Genetics Microbial Genetics and Genomics Plant Genetics & Genomics
Content Type	Text
Resource Type	Article
Subject	Genetics Medicine

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