Chloroplast Numbers per Cell and Cell Volumes in Apomictic Hieracium Polyploids (Asteraceae).
نویسندگان
چکیده
منابع مشابه
Patterns of plastid and nuclear variation among apomictic polyploids of Hieracium: evolutionary processes and taxonomic implications.
BACKGROUND AND AIMS Apomictic species (with asexual seed production) make up for 20-50 % of all taxonomically recognized species in northern Europe, but the phylogenetic relationships of apomictic species and the mode of evolution and speciation remain largely unknown and their taxonomy is consequently disputed. METHODS In the present study, plastid psbD-trnT sequences (349 accessions) and 12...
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Chloroplast DNA sequences show substantial variation between higher plant species, and less variation within species, so are typically excellent markers to investigate evolutionary, population and genetic relationships and phylogenies. We sequenced the plastomes of Taraxacum obtusifrons Markl. (O978); T. stridulum Trávniček ined. (S3); and T. amplum Markl. (A978), three apomictic triploid (2n =...
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BACKGROUND Polyploidy, frequently termed "whole genome duplication", is a major force in the evolution of many eukaryotes. Indeed, most angiosperm species have undergone at least one round of polyploidy in their evolutionary history. Despite enormous progress in our understanding of many aspects of polyploidy, we essentially have no information about the role of chromosome divergence in the est...
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ژورنال
عنوان ژورنال: CYTOLOGIA
سال: 1994
ISSN: 0011-4545,1348-7019
DOI: 10.1508/cytologia.59.231