A polyploid complex, also called a diploid-polyploid complex, is a group of interrelated and interbreeding species that also have differing levels of ploidy that can allow interbreeding. A polyploid complex was described by E. B. Babcock and G. Ledyard Stebbins in their 1938 monograph The American Species of Crepis: their interrelationships and distribution as affected by polyploidy and apomixis. In Crepis and some other perennial plant species, a polyploid complex may arise where there are at least two genetically isolated diploid populations, in addition to auto- and allopolyploid derivatives that coexist and interbreed. Thus a complex network of interrelated forms may exist where the polyploid forms allow for intermediate forms between the diploid species that are otherwise unable to in
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| - Complejo poliploide (es)
- Polyploid complex (en)
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| - Un complejo poliploide es un grupo de poblaciones de plantas interrelacionadas que se pueden hibridar entre sí y que, además, presentan diferentes niveles de ploidía, lo que permite el flujo génico entre especies no relacionadas. (es)
- A polyploid complex, also called a diploid-polyploid complex, is a group of interrelated and interbreeding species that also have differing levels of ploidy that can allow interbreeding. A polyploid complex was described by E. B. Babcock and G. Ledyard Stebbins in their 1938 monograph The American Species of Crepis: their interrelationships and distribution as affected by polyploidy and apomixis. In Crepis and some other perennial plant species, a polyploid complex may arise where there are at least two genetically isolated diploid populations, in addition to auto- and allopolyploid derivatives that coexist and interbreed. Thus a complex network of interrelated forms may exist where the polyploid forms allow for intermediate forms between the diploid species that are otherwise unable to in (en)
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| - Un complejo poliploide es un grupo de poblaciones de plantas interrelacionadas que se pueden hibridar entre sí y que, además, presentan diferentes niveles de ploidía, lo que permite el flujo génico entre especies no relacionadas. El concepto fue descrito por primera vez por Ernest Brown Babcock y G. Ledyard Stebbins en su obra de 1938 sobre las especies americanas de Crepis. En Crepis y otras especies perennes herbáceas, un complejo poliploide puede surgir en la naturaleza cuando existen al menos dos poblaciones diploides genéticamente aisladas además de poblaciones derivadas de ellas auto y que coexisten y pueden hibridaree entre sí. De ese modo, una compleja red de formas pueden coexistir, en la cual los poliploides permiten el intercambio de genes entre las poblaciones diploides el que, de otro modo, no podría verificarse. (es)
- A polyploid complex, also called a diploid-polyploid complex, is a group of interrelated and interbreeding species that also have differing levels of ploidy that can allow interbreeding. A polyploid complex was described by E. B. Babcock and G. Ledyard Stebbins in their 1938 monograph The American Species of Crepis: their interrelationships and distribution as affected by polyploidy and apomixis. In Crepis and some other perennial plant species, a polyploid complex may arise where there are at least two genetically isolated diploid populations, in addition to auto- and allopolyploid derivatives that coexist and interbreed. Thus a complex network of interrelated forms may exist where the polyploid forms allow for intermediate forms between the diploid species that are otherwise unable to interbreed. This complex situation does not fit well within the biological species concept of Ernst Mayr which defines a species as "groups of actually or potentially interbreeding natural populations which are reproductively isolated from other such groups". In many diploid-polyploid complexes the polyploid hybrid members reproduce asexually while diploids reproduce sexually. Thus polyploidy is related to the phenomenon called "geographic parthenogenesis" by zoologist , that asexual organisms often have greater geographic ranges than their sexual relatives. It is not known which of the associated factors is the major determiner of geographic parthenogenesis, hybridization, polyploidy, or asexual reproduction. (en)
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