allopolyploid


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al·lo·pol·y·ploid

(al'ō-pol'i-ployd),
An alloploid having three or more haploid sets of chromosomes.
[allo- + polyploid]

allopolyploid

(ăl′ə-pŏl′ē-ploid′)
adj.
Having two or more complete sets of chromosomes derived from different species.
n.
An allopolyploid organism.

al′lo·pol′y·ploi′dy n.

allopolyploid

[al′əpol′iploid]
Etymology: Gk, allos + polyplous, many times, eidos form
1 an individual, an organism, a strain, or a cell that has more than two genetically distinct sets of chromosomes derived from two or more different ancestral species, as occurs in hybridization. Such individuals are referred to as allotriploid, allotetraploid, allopentaploid, allohexaploid, and so on, depending on the number of haploid sets of chromosomes they contain. Compare allodiploid, autodiploid.See also mosaic.
2 also allopolyploidic, pertaining to such an individual, organism, strain, or cell. Also called alloploid. allopolyploidy, autopolyploid, n.

allopolyploid

adjective Referring to allopolyploidy.

noun
(1) A polyploid organism with multiple chromosome sets from different species.
(2) A hybrid organism created from two closely related species, which contains one or more extra sets of chromosomes.

al·lo·pol·y·ploid

(al'ō-pol'i-ployd)
An alloploid having three or more haploid sets of chromosomes.
[allo- + polyploid]
Allopolyploidclick for a larger image
Fig. 24 Allopolyploid . The creation of a fertile allotetraploid.

allopolyploid

a type of POLYPLOID in which the number of chromosomes is doubled in a hybrid between two species. The resulting allotetraploid or amphidiploid is fertile since HOMOLOGOUS CHROMOSOMES of both types can now pair at MEIOSIS to produce viable GAMETES

Such a process has been important in the production of new species, particularly in plants. For example, the successful marshland grass Spartina anglica is a fertile allotetraploid developed from an infertile hybrid (S. townsendii) produced originally by a cross between S. alterniflora and S. maritima. Compare AUTOPOLYPLOID.

References in periodicals archive ?
Grant-Downton and Dickinson (2006) indicated that research of the epigenetics of allopolyploid hybrids between Arabidopsis thaliana and A.
The resultant strict bivalent pairing prevents intergenomic recombination and brings about higher fertility and permanent heterosis between homoeoalleles, thus fostering the successful establishment of the newly formed allopolyploid species in nature.
Genomic in situ hybridization (GISH) reveals both autopolyploid and allopolyploid origins of different North and Central American hexaploid potato (Solanum section Petota) species.
The mechanism for this process in Bromus is currently speculative but in newly synthesized allopolyploid wheats (Aegilops-Triticum spp.
Sugarcane is an allopolyploid crop with [greater than or equal to]120 or more chromosomes, of which~5.
An allopolyploid origin for Collomia biflora opens the door for additional hypotheses of dispersal relative to diversification.
Rajhathy and Thomas (1974) suggested that such chromosomal rearrangements had a significant role in allopolyploid oat evolution and this hypothesis was supported by studies of the intergenomic translocation involving chromosomes 7C and 17 (T7C-17) (Zhou et al.
adiantum-nigrum is of allopolyploid origin, arising from the hybridization of two strictly European diploids, A.
Unreduced gametes are relatively common in Fragaria, and allopolyploid and autopolyploid species have been discovered (Hancock, 1999).
Tanaka interpreted this as evidence of two distinct sets of chromosomes in the parental gametes and thus of allopolyploid origin for the parents.