Breeding pair insect. True breeding pairs are rare in amphibians or reptiles, although the Australian Shingleback is one exception with long-term pair-bonds. Some fish form short term pairs and the French angelfish is thought to pair-bond over a long term. True breeding pairs are quite common in birds. Breeding pair arrangements are rare in mammals, where the prevailing patterns are either that the male and female only meet for copulation (e.g. brown bear) or that dominant males have a harem of females (e.g. walrus). Breeding pair Breeding pair is a pair of animals which cooperate over time to produce offspring with some
Breeding of strawberries have employed many breeding techniques, starting with traditional plant breeding and then moving on to molecular breeding and genetic engineering in the 20th century. In Europe, there were three main strawberry species. They are "Fragaria vesca", "F. viridis" and "F. moschata". By the time American plants were introduced, the most commonly grown of these was "F. vesca". A species that has both red and blue varieties . It is also known as the "woodland strawberry". Of particular interest is "F. sylvestris" var. "semperflorens", a variety of "F vesca". "F. sylvestris" var. "semperflorens" is unusual, because it is ever-bearing, meaning that