CHLOROPLAST DNA HAPLOTYPE VARIATION WITHIN AND AMONG POPULATIONS OF COREOPSIS-GRANDIFLORA (ASTERACEAE)

被引:0
作者
MASONGAMER, RJ [1 ]
HOLSINGER, KE [1 ]
JANSEN, RK [1 ]
机构
[1] UNIV CONNECTICUT, DEPT ECOL & EVOLUT BIOL, STORRS, CT USA
关键词
CHLOROPLAST DNA; COREOPSIS; RESTRICTION SITE; INTRASPECIFIC VARIATION;
D O I
暂无
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
An intraspecific chloroplast DNA (cpDNA) restriction site survey within Coreopsis grandiflora was used-to evaluate the correspondence of genetic variation with patterns of morphological differentiation and geographical separation. Eight frequent-cutting restriction enzymes were used with a sample of 273 individuals representing 14 populations from two geographical regions. Thirteen distinct cpDNA haplotypes were detected, differing by as many as 22 restriction site changes, or an estimated 0.674% nucleotide sequence divergence. The survey detected sufficient cpDNA variation for analyses of intraspecific and intrapopulational genetic structure and yielded evidence for interpopulational gene flow, a cpDNA polymorphism that transcends the species boundary, and possible cpDNA introgression. Patterns of genetic diversity do not strictly correspond to either morphological variation or geographical distribution; this may be a result of either cpDNA introgression or the maintenance of a cpDNA polymorphism through the speciation event that gave rise to C. grandiflora.
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页码:371 / 381
页数:11
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