Comparison of the chicken and zebra finch Z chromosomes shows evolutionary rearrangements

被引:46
作者
Itoh, Yuichiro [1 ]
Kampf, Kathy [1 ]
Arnold, Arthur P. [1 ]
机构
[1] Univ Calif Los Angeles, Dept Physiol Sci, Los Angeles, CA 90095 USA
关键词
chicken; Gallus domesticus; fluorescence in situ hybridization; W chromosome; Z chromosome; zebra finch; Taeniopygia guttata;
D O I
10.1007/s10577-006-1082-1
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Using fluorescent in-situ hybridization (FISH) of zebra finch (Taeniopygia guttata) bacterial artificial chromosome (BAC) clones, we determined the chromosomal localizations of 14 zebra finch genes that are Z-linked in chickens: ATP5A1, CHD1, NR2F1, DMRT1, PAM, GHR, HSD17B4, NIPBL, ACO1, HINT1, SMAD2, SPIN, NTRK2 and UBE2R2. All 14 genes also map to the zebra finch Z chromosome, indicating substantial conservation of gene content on the Z chromosome in the two avian lineages. However, the physical order of these genes on the zebra finch Z chromosome differed from that of the chicken, in a pattern that would have required several inversions since the two lineages diverged. Eight of 14 zebra finch BAC DNA showed cross-hybridization to the W chromosome, usually to the entire W chromosome, suggesting that repetitive sequences are shared by the W and Z chromosomes. These repetitive sequences likely evolved in the finch lineage after it diverged from the Galliform lineage.
引用
收藏
页码:805 / 815
页数:11
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