Failure of " P . lutzii " to backcross with " P . sitchensis " ( Gordon 1988 ) contention that backcrossing with several spruce hybrids was proving much less successful than expected.
22.
Here, backcrossing is carried out until a desired level of recombination has occurred and genetic markers are used to detect desired recombinant chromosome substitution lines in the target region, which can be fixed by doubled haploidy.
23.
Prospect Rock Permaculture in Vermont has been backcrossing buartnuts with native butternuts, resulting in'butterbuarts', which will most likely bear greater resemblance to the butternut parentage, although may also be more susceptible to the canker.
24.
Through backcrossing, also has been used extensively to transfer individual genes such as wx ( waxy ), o2 ( opaque 2 ) and the Htl gene for resistance to the leaf blight was transferred to regular dent corn.
25.
The progeny-group of a harem with a dominant male, for example, may contain elements of sib-crossing, cousin crossing, and backcrossing, as well as genetic drift, especially of the " island " type.
26.
Congenic strains are generated in the laboratory by mating two inbred strains ( usually rats or mice ), and backcrossing the descendants 5-10 generations with one of the original strains, known as the " recipient " strain.
27.
Introgression refers to the gradual infiltration of germplasm of one species into that of another as a consequence of hybridization and repeated backcrossing, i . e ., the crossing of a hybrid with either of its parents ( Anderson 1949 ).
28.
During his period in Vienna, Jesenko commenced several studies on plant hybridisation under von Tschermak's supervision, obtaining fertile hybrids between different varieties of wheat and rye with the help of backcrossing, and studying their characteristics with reference to Mendelian principles.
29.
Within the wolf line, the scientists found, the dogs separate into four groups, suggesting that the wolf was domesticated on at most four separate occasions, or was maybe domesticated just once, with backcrossing between dogs and wolves occurring on three later occasions.
30.
:: : : : : : Dog breeds are not quite so genetically inbred as mice strains-especially not these days . Rather than strict backcrossing, dog breeding uses phenotype selectivity in mating ( which is a kind of proxy for kin mating ).
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