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 ?
Marker-assisted introgression in backcross breeding programs.
Advanced backcross QTL analysis: A method for the simultaneous discovery and transfer of valuable QTLs from unadaptedgermplasm into elite breeding lines.
It clearly show that during backcross phase frequency of favourable allele for introgressing QTL keep at 0.
In the clustering pattern analyses by means of low heritability characteristics, the nearest neighbor clustering method (Figure 1G) was the method that best reflected the actual clustering structure for backcrosses 1 and 2, for reclustering all individuals from the RCb backcross together with P2, for reclustering all individuals from the RCa backcross together with P1, and for maintaining F1 apart from both.
Figure 2 (TACF 2007) illustrates the backcross method--showing the progression of trees first being crossed to establish a 1/2 American, 1/2 Chinese generation, denoted as [F.
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.
Likewise, map-based studies of introgression often reveal the unidirectional elimination of many genomic regions in backcross lines (e.
2], backcross, and further cross hybrids were as viable and fertile as the parent species (McMillan et al.
Chi-Squared values and probabilities of goodness of fit of segregation ratios of F2 and backcross generations in a study of inheritance of leaf trichomes trait in three cross combinations are shown in Table 4.
Erkul and Unay (2009b), the backcross generation with Cumhuriyet 75 was identified to have higher mean values for plant height and peduncle length.
Idaho 587 was derived from the third backcross of Stephens (Kronstad et al.