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 ?
Partial infertility was observed in the backcross groups (BCP1, BPC1); approximately 3 million larvae developed successfully from 10 billion fertilized eggs, representing a particularly low development rate compared with the bay scallop control (P < 0.
MONITORING HENNEGUYA ICTALURI INFECTION IN CHANNEL CATFISH, BLUE CATFISH AND CHANNEL X BLUE BACKCROSS HYBRIDS USING HISTOPATHOLOGY, REAL-TIME PCR AND IN SITU HYBRIDIZATION
They are known to hybridize and these hybrids then backcross with the parental species leading to introgression, the movement of genes of one species into another.
Also, the hybrids appear to backcross with only one of their parent species,A, cervicornis.
Unfortunately backcross hybrids have lost that heterotic trait.
Indigenous African cattle can be broadly classified into four categories: humpless Bos taurus, humped Bos indicus, sanga (African humpless Bos taurus x humped Bos indicus hybrid), and zenga, defined as sanga x zebu backcross.
lutescens might hybridize and backcross extensively across a zone of secondary contact, and that the population on Kenai is not mainly a mixture of the two parental species, as might be indicated by bimodal distributions (see Jiggins and Mallet 2000).
Evaluation of conventional resistance to European corn borer (Lepidoptera: Crambidae) and western corn rootworm (Coleoptera: Chrysomelidae) in experimental maize lines developed from a backcross breeding program.
Four fish identified as walleye by morphology contained sauger alleles (two backcrosses to walleye, one backcross to sauger, and one [F.
To confirm each backcross, TACF tested the created seedlings by inoculating them with blight.
1] hybrid, as opposed to a backcross or pure parent individual, increases with the number of nuclear loci examined.
Another breeding strategy that is commonly used in inbred mouse studies is the backcross design.