About Lesson
- Same form whether self- or cross-pollinated species
- Only difference is pollination control
- With backcross we approach homozygosity at the same rate as with selfing
- Goal is to move 1 to a few traits from a donor parent (deficient in other traits) to a recurrent parent (deficient in the trait of interest)
- Limited use of BC to create a population for selection that fosters wider genetic variance and modest introgression is a separate issue than a repeated BC to derive a new cultivar
- Jensen suggested that a 3-way (a backcross to another recurrent or superior parent following the single cross of a desirable and an undesirable parent) was superior to single cross followed by pedigree or other selection methodology
- BC must be used with other, more exploratory procedures; otherwise Gs=0
- Must have a suitable recurrent parent of BCs to make? usually 4
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