Results 221 to 230 of about 11,998,864 (263)
Some of the next articles are maybe not open access.
Meiotic Pairing and Chromosome Morphology in American Elm
Forest Science, 1975Abstract Meiosis in American elm (a tetraploid with 2N = 56 chromosomes) was regular at all stages. Fifty well-spread cells at diakinesis or metaphase I from each of four trees showed that 28 bivalents were regularly formed. The average number of chiasmata per bivalent, determined from 18 cells, was 2.15 with a range of 1 to 4.
Robert P. Karrafalt, David F. Karnosky
openaire +1 more source
Storage and Dewinging of American Elm Seed
Journal of Forestry, 1937Abstract American elm has long been a very popular tree for prairie planting in the northern Great Plains region. Because of the fact that it has been believed generally that American elm seed could not be stored for any appreciable period of time it has been common practice to plant the seed shortly after it matures in the latter ...
openaire +1 more source
American Elm Site-Index Growth Curves
Transactions of the Kansas Academy of Science (1903-), 1990Site-index curves for evaluating the growth potential of American elm in native timber stands in Kansas were developed from data gathered in the 1964-1965 Kansas forest inventory. American elm (Ulmus americana L.) is the most common native elm found in Kansas.
Wayne A. Geyer, Keith D. Lynch
openaire +1 more source
An Attempt to Induce Polyhaploidy in American Elm
Forest Science, 1970Abstract Pollen from the three diploid species and irradiated pollen from American elm were used in crosses to induce polyhaploidy in tetraploid American elm. The resulting seedlings were tetraploid and morphologically typical of American elm, presumably as a consequence of self-fertilization. Forest Sci. 16: 137-138.
openaire +1 more source
REGROWTH CONTROL IN AMERICAN ELM BY CHEMICAL INJECTION
Arboricultural Journal, 1980(1980). REGROWTH CONTROL IN AMERICAN ELM BY CHEMICAL INJECTION. Arboricultural Journal: Vol. 4, No. 1, pp. 22-24.
B R Roberts, D E Wuertz, C L Wilson
openaire +1 more source
A Natural Hybrid Between American And Siberian Elms
Forest Science, 1970Abstract A triploid elm was found among a group of atypical seedlings selected from a nursery bed of American elms. Cytological, morphological, and biochemical evidence indicated that it was a hybrid between American elm and Siberian elm. Although the tree has not borne any viable seed, it does produce apparently fertile pollen. Thus,
openaire +1 more source
Self-Compatibility and Inbreeding Depression in American Elm
Forest Science, 1971Abstract American elm is generally self-compatible although seed set after artificial selfing ranges from 0 to at least 67 percent of seed set after outcrossing. Effects of selfing are demonstrated for fruit and seed development, seed germination, and seedling height growth. Forest Sci. 17:321-322.
openaire +1 more source
Cold Hardiness Considerations for Restoration of Dutch Elm Disease-Tolerant American Elm
Proceedings of the first biennial Northern Hardwood Conference 2021, 2023Paul G. Schaberg +5 more
openaire +1 more source
American Elm: Building in Resistance to Dutch Elm Disease
Journal of Forestry, 1997Z.-M. Cheng +3 more
openaire +1 more source