from The American Heritage® Dictionary of the English Language, 5th Edition.
- transitive verb To cross (a hybrid) with one of its parents or with an individual genetically identical to one of its parents.
- noun The act of making such a cross.
- noun An individual resulting from such a cross.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- verb genetics To
crossa hybridwith one of its parents
- noun The act of such a crossing
- noun An individual produced by such a crossing
- noun juggling Alternative form of
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- verb mate a hybrid of the first generation with one of its parents
Sorry, no etymologies found.
Moreover, testicular histology of F1 and backcross males showed in some cases a breakdown in spermatogenesis.
Genome-wide and additional fine mapping of backcross mice, derived from C3H
"Inheritance of oilseed rape (Brassica napus) RAPD markers in a backcross progeny with Brassica camestris."
RPS15, while the backcross with the NHP2+, rps15-1 strain yielded a viable diploid strain.
In contrast, A. collina-4x and its suspected backcross plants show homeologous gene copies: sequences from the same tetraploid individual plant are placed in both diploid clades.
MAT locus as evidenced by analyzing tetrads obtained from the initial backcross to rps15-1 (data not shown).
At Cataloochee, researchers are using the backcross method to breed a new tree that is blight resistant but has the dominant characteristics of the original American chestnut.
By analyzing DNA sequences of two single-copy nuclear genes and the genomic AFLP data, we assess the allopolyploid origin of A. collina-4x from ancestors corresponding to A. setacea-2x and A. asplenifolia-2x, and the ongoing backcross introgression between these diploid progenitor and tetraploid progeny lineages.
Our study demonstrates use of in silico analysis in candidate gene identification as a way of reducing large-scale backcross breeding programmes.
All selected polymorphisms were verified by re-sequencing DNA taken from the mice used in the backcross.