ploidy

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ploi·dy

(ploy'dē),
The number of haploid sets in a cell. Gametes normally contain one; somatic cells two.
See also: polyploidy.
[-ploid + -y, condition]

ploidy

(ploi′dē)
n.
A multiple of the basic number of chromosomes in a cell.

ploi·dy

(ploy'dē)
The number of haploid sets in a cell. Gametes normally contain one; autosomal cells, two.
See also: polyploidy
[ploid + -y, condition]

ploidy

The number of copies of the set of chromosomes in a cell. A normal diploid cell with two copies has a ploidy of two; a haploid cell with one copy, such as an ovum or a spermatozoon, has a ploidy of one.

ploidy

the number of chromosome sets making up the total genome of an organism.

Thus the ploidy of normal humans is two and is written 2n. See DIPLOID (1).

References in periodicals archive ?
Van Harten and Bouter (1973) used simple and secondary dihaploids for irradiations.
and those that were not (and are therefore dihaploid).
Plant regeneration from mono- and dihaploid potato genotypes often results in ploidy changes, but little aneuploidy; on the other hand, regenerated plants from tetraploid genotypes produce a wide range of aneuplody (Kumar, 1994).
Tunali, "Kavunda icinlanmic polen tozlamalari ile haploid embriyo uyartiminda genotip etkisi, dihaploid hatlarin olusturulmasi, haploid ve diploid bitkilerin degisik yontemlerle ayrimi," Turkish Journal of Agriculture and Forestry, vol.
Comparison of cell characters in leaves of dihaploid potatoes, their chromosome-doubled derivatives and parthenogenic tetraploid parents.
Mapping of extreme resistance to PVY (Ry sto) on chromosome XII using anther-culture-derived primary dihaploid potato lines.
However, SNPs can readily be used in potatoes by reducing autotetraploid potatoes to dihaploid families (Simko, 2004; Velasquez et al.
Kutsaga 110 is an anther-derived dihaploid from the cross TW 438 x Kutsaga 51E (Anne Jack, personal communication, 2000).
Microspore embryogenesis in anther culture of 3 species of Populus and regeneration of dihaploid plants of Populus trichocarpa.
These germplasms may have potential for dihaploid breeding, attaining cytoplasmic diversity, characterizing cytoplasmic organelles and facilitating wide crosses.
The influence of "genetic background" can be illustrated by comparisons between pairing in a polyploid species, pairing in the dihaploid or polyhaploid derived from it, and pairing in different hybrid combinations.