by
backcrossing as a classic plant breeding technique
Minimum sample size and optimal positioning of flanking markers in marker-assisted
backcrossing for transfer of a target gene.
In this study, we aimed to introgress a blast resistance gene using local resistant genotypes, Pongsu Seribu 2 into MR264, a high-yielding rice variety that is blast susceptible thru Marker-Assisted
Backcrossing (MABC) approach.
Restoration of genetic background: Hospital 2003 used ratio ofhomozygous markers(two allelesbothfrom recipient) to all markers to show restoration of recipient genetic background, unlike Hospital, we used percentage of alleles inherited from the recipient parent to estimate restoration of recipient genetic background, the restoration status of recipient genetic background under different background selection methods show in figure 2:
backcrossing two generations, the restoration degree of recipient genetic background reached 93% by genomic similarity selection and index selection,
backcrossing four generations, restoration degree of recipient genetic background reached 100%.
Charles Burnham proposed a well-established plant breeding technique known as "
backcrossing" that had successfully been used to fight disease in com and wheat plants.
McCarthy suggested the original pig-chimp hook up was followed by several generations of "
backcrossing", where the pig-chimp offspring played and assimilated among chimps before mating with them.
ABSTRACT The growth characteristics and morphological features of the Atlantic bay scallop (Argopecten irradians irradians Lamarck), Chilean scallop (Argopecten purpuratus Lamarck), F1 hybrids of these species, and the offspring produced via 2 cycles of
backcrossing between hybrid populations and the Atlantic bay scallop were examined to determine the feasibility of broadening the genetic basis of the bay scallop.
This finding is further supported by a more recent and reliable molecular/genetic study showing a low frequency of
backcrossing in common carp X goldfish hybrids (Hanfling et al., 2005).
Upper grades study forest ecology, perform DNA experiments, and study the genetics of
backcrossing Chinese chestnut hybrids to surviving native chestnuts, aiming for a tree that incorporates the desirable characteristics of the native with just enough Chinese to resist blight.
Through
backcrossing, the researchers have produced progeny that also offer good productivity, vigor and adaptation.