backcross

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backcross

 [bak´cros″]
in experimental genetics, union between a heterozygote of the first generation and one of its parents or an organism genetically identical to one of its parents.
double backcross the mating between a double heterozygote and a homozygote.

back·cross

(bak'kros),
1. The mating between an animal that is homozygous at a locus of interest and an animal that is heterozygous, commonly from the same ancestral stock.
2. Synonym(s): testcross

backcross

/back·cross/ (bak´kros) a mating between a heterozygote and a homozygote.

backcross

(băk′krôs′, -krŏs′)
tr.v. back·crossed, back·crossing, back·crosses
To cross (a hybrid) with one of its parents or with an individual genetically identical to one of its parents.
n.
1. The act of making such a cross.
2. An individual resulting from such a cross.

backcross

Etymology: AS, baec + cruc, cross
1 a mating (cross) between a heterozygote and a homozygote.
2 an organism or strain produced by such a cross. See also testcross.

back·cross

(bak'kraws)
Mating of an individual heterozygous at one or more loci to an individual homozygous at the same loci.
Backcrossclick for a larger image
Fig. 59 Backcross . Results from different parental types.

backcross

a genetical term describing a mating between a HYBRID organism and one of the original parental types. The results of a backcross depend upon the parental type.

A backcross to the recessive parental is diagnostic (since it reveals the genotype of the hybrid) and is called a TESTCROSS.

backcross

mating the crossbred offspring of a two-way cross back to one of the parent breeds.
References in periodicals archive ?
The WPGMC, UPGMA and nearest neighbor clustering methods were the methods that best grouped generations derived from the breeding genetic system established by generations of backcrosses because a cut made at 75% still allowed differentiation of the three hierarchical groups (Figures 1L, M and N).
Although the vast majority of deviating ratios observed in species backcrosses have favored the genes of the recurrent parent, there have been several exceptions to this general rule.
1] hybrids are intermediate in resistance to the parents, reciprocal backcrosses should be intermediate between the [F.
Indeed, encapsulation phenotype Mendelizes in our backcrosses through [F.
Backcross populations were not equal in strength to the NRP, but a satisfactory level (94% of the NRP) was maintained through three backcrosses.
As backcrosses become more advanced, error probabilities are substantially lower.
These are typified by intermediacy of morphological characters (as reflected by PC1 scores) relative to the "pure" parentals, heterozygosity at either of the two allozyme marker, (any of the three for backcrosses to L.
BS10(FR)C11, BS13(S)C8, BSSS(R)C13, and B73 were crossed to both lines and backcrosses made to the four temperate recurrent parents.
The data are absent for three types of backcrosses either because they were not tested (BC [male] M), or because they produced few (BC [female] D) or no litters (BC [female] D).
After 1983, survival and reproduction of the hybrids and the products of the backcrosses to G.
Although a number of backcrosses were attempted for all crosses, only two backcrosses used for analysis in this study, because seed set was low.