Similar slow progress has occurred at the project in Mexico, where scientists started by crossing corn with tripsacum, a wild relative that was naturally apomictic.
22.
This results in an uncertainty in the number of species contained in each of these genera, due to the difficulty of dividing apomictic complexes into species.
23.
The catalogue contains separate entries for every species ( including microspecies for all apomictic groups ), as well as separate entries for all subspecies and interspecific hybrids.
24.
His last book, " Interspecific Hybrid Derivatives Between Facultatively Apomictic Species of Bluegrasses & Their Responses to Contrasting Environments ", was published in 1982.
25.
However, the timing of the various developmental processes is critical to successful development of an apomictic seed, and the timing can be affected by multiple genetic factors.
26.
In plants with both apomictic and meiotic embryology, the proportion of the different types can differ at different times of year, and photoperiod can also change the proportion.
27.
Pseudogamy occurs in some plants that have apomictic seeds, where pollination is often needed to initiate embryo growth, though the pollen contributes no genetic material to the developing offspring.
28.
It appears unlikely that there are any truly completely apomictic plants, as low rates of sexual reproduction have been found in several species that were previously thought to be entirely apomictic.
29.
It appears unlikely that there are any truly completely apomictic plants, as low rates of sexual reproduction have been found in several species that were previously thought to be entirely apomictic.
30.
They are native throughout the cool temperate regions of the Northern Hemisphere, with the highest species diversity in the mountains of western China and the Himalaya, where numerous apomictic microspecies occur.
