polyploidy

Segmental allopolyploidy has been proposed by Matsubayashi (1991) for

That study pointed out that hybridization and continuous rounds of genome duplication in ancestral cytotypes of the genera Sphaerium, Musculium, and Pisidium is the most probable evolutionary mechanism to explain polyploidization events (allopolyploidy).

Polyploidy via hybridization (allopolyploidy) is often associated with the incurrence of an increased adaptive ability in progeny (i.e., hybrid vigor).

tauschii is a good example of success of natural allopolyploidy. Chromosome doubling during meiosis is believed to contribute significantly to the widespread occurrence of polyploids in nature (Harlan and de Wet, 1975; Veilleux, 1985; Jauhar, 1993).

These include: (1) asexual reproduction; (2) permanent translocation heterozygosity; (3) permanent odd polyploidy; (4) allopolyploidy; and (5) the stabilization of a rare diploid hybrid segregant isolated by premating and/or postmating barriers.

The timetable for allopolyploidy in flowering plants.

Low-copy nuclear data confirm rampant allopolyploidy in the Cystopteridaceae (Polypodiales).

Also, It has been suggested that hybridization combined with polyploidy (allopolyploidy) confers an immediate ecological aptitude to invade new habitats, which increase the importance of their study (Ainouche et al.

Allopolyploidy is recognizably an important mode of speciation in plants (Otto & Whitton, 2000; Soltis & Soltis, 2000, 2009).

Two extreme categories of polyploidy can be recognized: autopolyploidy and allopolyploidy. Autopolyploids derive replicate chromosome sets from a single parent species.

Certainly these anomalies of nature may be important to the process of evolution (hybridization and allopolyploidy are especially important for plant speciation), but with habitats and species disappearing at such an alarming rate, priorities must be set.

coupling-phase within each linkage group would indicate allopolyploidy (disomic inheritance), and a 0.25:1 ratio would indicate autopolyploidy (tetrasomic inheritance).