Polyploid organisms
نویسندگان
چکیده
منابع مشابه
Polyploid incidence and evolution.
Changes in ploidy occurred early in the diversification of some animal and plant lineages and represent an ongoing phenomenon in others. While the prevalence of polyploid lineages indicates that this phenomenon is a common and successful evolutionary transition, whether polyploidization itself has a significant effect on patterns and rates of diversification remains an open question. Here we re...
متن کاملChromosome pairing in polyploid cells.
The homologues in polyploid metaphases of air-dried suspensions of cultured cells are usually seen closely paired as diplochromosomes ("endore duplicated" cells) or unpaired as randomly distributed chromosomes ("poly ploid" cells). More often we find another configuration, a mixture of paired and unpaired chromosomes in the same metaphase, and describe here the conditions under which it appears...
متن کاملNext-generation polyploid phylogenetics: rapid resolution of hybrid polyploid complexes using PacBio single-molecule sequencing.
Difficulties in generating nuclear data for polyploids have impeded phylogenetic study of these groups. We describe a high-throughput protocol and an associated bioinformatics pipeline (Pipeline for Untangling Reticulate Complexes (Purc)) that is able to generate these data quickly and conveniently, and demonstrate its efficacy on accessions from the fern family Cystopteridaceae. We conclude wi...
متن کاملThe Power of Plasticity in Polyploid Persimmon.
Most plants are hermaphrodites, producing perfect flowers with both male and female functions. In roughly 6%of plants, however, male (usually XY) plants produce only male flowers and female (XX) plants produce only female flowers. Thesedioecious plants cannot self-pollinate, ensuring genetic diversity and facilitating the breeding process. In the dioecious diploid persimmon (Diospyros lotus), s...
متن کاملUlmus americana (Ulmaceae) is a polyploid complex.
PREMISE OF THE STUDY Exotic diseases are threatening many North American tree species, and management of diseases requires understanding the biology of the host as well as the pathogen. Ulmus americana is a widespread dominant tree of eastern North America that has been widely planted as an ornamental and shade tree. Populations of the species have suffered heavy mortality from Dutch elm diseas...
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ژورنال
عنوان ژورنال: Science China Life Sciences
سال: 2012
ISSN: 1674-7305,1869-1889
DOI: 10.1007/s11427-012-4310-2