VARIATIONS IN GENOME MASS

被引:20
作者
WACHTEL, SS
TIERSCH, TR
机构
[1] UNIV TENNESSEE CTR HLTH SCI, MEMPHIS, TN 38163 USA
[2] USDA ARS, CATFISH GENET RES UNIT, STONEVILLE, MS 38776 USA
来源
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY | 1993年 / 104卷 / 02期
关键词
D O I
10.1016/0305-0491(93)90360-H
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
1. Genome size varies considerably among vertebrates, ranging from less than 1 pg to more than 200 pg; the amount of DNA differing among individuals in a population can equal the amount in the entire structural gene complement. 2. Recent technological advances permit evaluation of genome size variation at several levels including sub-chromosomal, chromosomal and cellular. 3. Genome size variation may also be viewed from taxonomic levels, and across evolutionary time frames. 4. As sources of genome size variation are identified and studied, the conundrum of the C-value paradox (lack of correlations among genome size, genomic complexity and phylogenetic status of organisms) may prove to be more apparent than real. 5. For example, the limited and relatively constant genome size of avians may be related to the physiological constraints of flight,
引用
收藏
页码:207 / 213
页数:7
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