The researchers noticed in 2008 that some of the C. becki shells were more saddle shaped than domed shaped, and found that these were
hybrid offspring from matings between the two species.
Not exact matches
The
offspring of an interspecific cross very often are sterile, this
hybrid sterility prevents the movement of genes
from one species to the other, keeping both species distinct.
After finding that two closely related species, the desert and Bryant's woodrats, could interbreed and produce
hybrid offspring, scientists set out to determine why only 14 percent of the population in a «contact zone» had genetic signatures
from both species.
The findings may also help researchers solve the mystery of
hybrid vigor, the as - yet unsolved puzzle as to why a
hybrid offspring proves to be a better grower than what would be expected
from the sum of its parents» genetic assets.
Diseases, invasive species, disruption of reproductive cycles, and less fit
hybrid offspring are just some of the risks that parrots and other species face when they are released in unfamiliar places and begin to reproduce with individuals
from different populations.
At the time the main concern for plant breeders was pollen movement between different strains of crops — if a variety of sweet corn was contaminated by pollen
from a popcorn variety, then the resulting
hybrid offspring would produce seeds that were unusable for market purposes or for selecting new varieties.
In addition to Sequoia, the team also sequenced a barred owl individual
from the eastern United States as a baseline of comparison for better evaluating the frequency of interbreeding and tracking
hybrid offspring in the wild.
Inter-breeding animals
from two genetically distinct populations can sometimes lead to «
hybrid vigor», in which
offspring reap the benefits of their parents» individual qualities.
The F2 progeny — the
offspring of a cross between any two unrelated seed lines — of sorghum
hybrids segregate for male sterility and when present near johnsongrass, there is a high likelihood the male sterile sorghum will receive pollen
from johnsongrass, he said.
However, unlike the parent strains, F1
hybrids do not breed true: the F2
offspring produced by mating F1 mice all have a unique random mixture of alleles
from both parental strains.
«When a beautiful human - alien
hybrid (Henstridge) escapes
from observation, scientist Xavier Fitch (Kingsley) dispatches a crew of experts to find her before she is able to fulfill her horrific purpose: to mate with unsuspecting men and produce
offspring that could destroy mankind.
A
hybrid is the
offspring resulting
from cross-breeding.
Bichpoos are
hybrids that come
from first generation cross-breeding between a pure - bred Bichon Frise and Toy (or Miniature) poodle versus being the
offspring of two Bichpoos.