backcross

(redirected from backcrossed)
Also found in: Dictionary, Thesaurus, Encyclopedia.

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

(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.

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.

References in periodicals archive ?
Marker-assisted foreground selection: Four selected F1 plants were backcrossed with MR264 to develop BC1F1 plants.
To test this possibility, we crossed LUG females to [ltd.sup.1]/[ltd.sup.1]; TM6B, Tb/l males and backcrossed the resulting [F.sub.1] females (who experience recombination) to [ltd.sup.1]/[ltd.sup.1] males.
This day-neutral selection was then backcrossed three times to T239, each time selecting for the day-neutral flowering habit in the [F.sup.2] following each backcross.
Resulting hybrid females were backcrossed to the paternal species for up to 15 generations.
After each backcross, the segregating populations were screened with a mixture of races of the causal organism; and the resistant plants were then backcrossed to the RP.
BS11(FR)C11, BS26(S)C3, and BSCB1(R)C13 were crossed to tropical Pool 17 and Populations 23, 25, 27, and 32 and crosses backcrossed to the three temperate parents.
The [F.sub.1] males were backcrossed to balancer line virgin females, and the progeny that expressed both recessive markers (m; e or m; ho) and one dominant marker from a balancer (SM5 or TM3) were mated.
These progenies were then backcrossed four times to their respective primitive parent and selected for DN flowering habit in the F2 generation following each backcross.
Both matings produce completely sterile males, but female hybrids are fertile and can be backcrossed to either species (David et al.
The semisterile [F.sub.1] males were backcrossed to D.
The backcrossed seed from the solider and more fertile plants were increased in a growth cabinet and scored for pith development.