ISSN:
1573-6849
Keywords:
Afa-family sequences
;
Leymus
;
subtelomeric heterochromatin
;
Triticeae
;
350-bp family sequences
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Two kinds of tandem repetitive sequences were isolated from Leymus racemosus (Lam.) Tzvelev. One of them was classified in the 350-bp family originally isolated from Secale. The other was a novel repetitive sequence family, named ‘TaiI family’, which consisted of a repeat unit of 570 bp. Fluorescence in-situ hybridization of the chromosomes of L. racemosus indicated that both families were located in subtelomeric heterochromatin and that the 350-bp family and TaiI family occupied different heterochromatin regions. In addition, even homologous chromosomes did not show the same patterns of TaiI and 350-bp families. The combination of these two families of repetitive sequences, together with Afa-family sequences and rDNAs, helps to identify the ten homologous chromosome pairs of L. racemosus. From these data, we proposed a karyotype of L. racemosus and compared it with other karyotypes already reported.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1009285311247
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