CHLOROPLAST DNA EVIDENCE FOR INTROGRESSION AND LONG-DISTANCE DISPERSAL IN THE DESERT ANNUAL SENECIO-FLAVUS (ASTERACEAE)
CHLOROPLAST DNA EVIDENCE FOR INTROGRESSION AND LONG-DISTANCE DISPERSAL IN THE DESERT ANNUAL SENECIO-FLAVUS (ASTERACEAE)
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DOI：
10.1007/bf00984630
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发表时间：
1995-01-01
影响因子：
1.9
通讯作者：
KADEREIT, JW
中科院分区：
文献类型：
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作者：
LISTON, A;KADEREIT, JW
叶绿体DNA （cpDNA）限制性位点变异的系统发育分析支持了西南亚黄花苜蓿亚种之间密切的遗传关系。短花菊和北美的S. mohavensis。这两种沙漠一年生植物的洲际不相交分布可能起源于长距离分散。南部和北非黄葡萄属亚种的叶绿体基因组。黄酮类和亚类。短花菇的cpDNA基因组至少有10个限制性内切位点不同，而亚属植物的cpDNA基因组最多有两个限制性内切位点不同。短花属和外群短花属。这表明黄葡萄球菌亚种的cpDNA基因组。短花菊可能是地中海一种与S. squalidus有亲缘关系的种的遗传渗入和叶绿体捕获所致。这种假设的渗入可以解释黄葡萄球菌亚种的形态差异和重复的同工酶位点。短花属，相对于亚属。flavus。
Phylogenetic analysis of chloroplast DNA (cpDNA) restriction site variation supports a close genetic relationship between the Southwest Asian Senecio flavus subsp. breviflorus and the North American S. mohavensis. The intercontinental disjunct distribution of these two desert annuals may have originated via long distance dispersal. The chloroplast genomes of the Southern and North African S. flavus subsp. flavus and subsp. breviflorus differ by at least ten restriction sites, while at most two restriction sites differentiate the cpDNA genomes of subsp. breviflorus and the outgroup S. squalidus. This suggests that the cpDNA genome of S. flavus subsp. breviflorus may have resulted from introgression and chloroplast capture with a Mediterranean species related to S. squalidus. This hypothesized introgression could account for the morphological distinctiveness and duplicated isozyme loci of S. flavus subsp. breviflorus relative to subsp. flavus.