In the four succeeding chapters, the most apparent and gravest difficulties on the theory will be given: namely, first, the difficulties of transitions, or in understanding how a simple being or a simple organ can be changed and perfected into a highly developed being or elaborately constructed organ; secondly the subject of Instinct, or the mental powers of animals, thirdly, Hybridism, or the infertility of species and the fertility of varieties when intercrossed
; and fourthly, the imperfection of the Geological Record.
For instance, using Illumina PorcineSNP60 Beadchip, Luo et al  identified 40 significant SNPs for IMF in a porcine Large White x Minzhu intercross
population, while Ma et al  detected 7 and 25 significant SNPs for IMF in the Duroc x Erhualian F2 animals and Chinese Sutai pigs.
A variant of this analysis that has been proposed is called a recombinant inbred intercross
or RIX (formally known as a diallel cross).
We previously performed QTL mapping for body weight in the same [F.sub.2] intercross
population and identified four significant QTL on Chrs 1, 2, 5, and 17 .
Then the intercross
and variation steps in the GA can be adopted to deal with the particles in resampling step for avoiding the particle degeneracy and loss of diversity.
phase, 10 males and 100 females were selected from introgression population by foreground selection and background selection to mate each other for next generation.
Finally, in 1996, the FWS and NMFS introduced an "intercross
policy" that would allow for the listing of hybrids when they "more closely resemble a parent belonging to a listed species than they resemble individuals intermediate between their listed and unlisted parents." (52) This "intercross
policy" was never passed; however, it was never formally withdrawn either.
A final step is to intercross
third backcrosses with each other to produce trees ([B.sub.3]-F2) that have a chance of inheriting the genes for blight resistance from both parents.
Lines in two rich yellow pigments intercross
and then are cropped off at the right edge.
ruziziensis progenies (2n = 4x = 36) derived from a population obtained from intercross
8 plants from the Embrapa Gado de Leite breeding program that were duplicated with colchicine.
chinensis to the salt-drought intercross
stress conditions has not been reported.
Teale, "Fine mapping of trypanosomiasis resistance loci in murine advanced intercross
lines," Mammalian Genome, vol.