Results 171 to 180 of about 3,612 (210)
Some of the next articles are maybe not open access.
Transmission of Scab Resistance to Tetraploid Potato Via Unilateral Sexual Polyploidization
American Journal of Potato Research, 2017Resistance to common scab continues to be a high priority trait for potato breeders. We have identified a source of resistance in the diploid wild potato relative Solanum chacoense and have introgressed it into cultivated potato by crossing it to a dihaploid.
Shelley Jansky +2 more
openaire +1 more source
Intermating of potato haploids and spontaneous sexual polyploidization—Effects on heterozygosity
American Potato Journal, 1982Solanum tuberosum Group Tuberosum haploids (2n = 2x = 24) were inter-mated using bulk pollen. Nearly half of the resulting progeny were tetraploid, arising from bilateral sexual polyploidization. Subsequent yield trials indicated that the diploid progeny did not yield significantly more than the original haploids, but the tetraploid progeny did yield ...
J. C. Sanford, R. E. Hanneman
openaire +1 more source
Sexual, apomictic and mixed populations in Handroanthus ochraceus (Bignoniaceae) polyploid complex
Plant Systematics and Evolution, 2018Some tropical Bignoniaceae form sporophytic apomictic polyploid complexes are similar to better studied temperate plants. Handroanthus ochraceus is a widely distributed Neotropical savanna tree with both monoembryonic/self-sterile, and polyembryonic/apomictic and self-fertile populations, but lacking chromosome number and morphological comparative ...
Mariana G. Mendes +4 more
openaire +1 more source
Polyploid unisexual salamanders have higher tissue regeneration rates than diploid sexual relatives
Journal of Zoology, 2016AbstractDifferences in genome composition are known to influence cell division and tissue growth, yet few studies have compared tissue growth between closely related taxa that vary in ploidy and genome composition. Whether cellular mechanisms scale to a functional trait such as tissue regeneration is important for understanding the ecological ...
M. J. Saccucci +3 more
openaire +1 more source
Cytological mechanism of 2n pollen formation and unilateral sexual polyploidization in Lolium
Euphytica, 1989Plants of Lolium perenne, L. multiflorum and L. hybridum (331, 51 and 18, respectively) were screened for 2n pollen production. The screening was based on the size differences that are expected to be found between n and 2n pollen of a plant. It was found that 28 plants of perennial ryegrass-belonging to 13 cultivars-produced produced pollen grains of ...
C. A. Sala +3 more
openaire +1 more source
Euphytica, 1998
The objective of the present study was to evaluate the fertility of tetraploid plants obtained from diploid mutants that produced 2n gametes via bilateral (BSP) and unilateral sexual polyploidization (USP) schemes. Controlled matings between selected plants from BSP and USP were carried out according to a complete diallel.
BARCACCIA, GIANNI +3 more
openaire +3 more sources
The objective of the present study was to evaluate the fertility of tetraploid plants obtained from diploid mutants that produced 2n gametes via bilateral (BSP) and unilateral sexual polyploidization (USP) schemes. Controlled matings between selected plants from BSP and USP were carried out according to a complete diallel.
BARCACCIA, GIANNI +3 more
openaire +3 more sources
Euphytica, 2006
Verticillium wilt is a serious disease of potato and is caused by the soil-borne fungi Verticillium dahliae and V. albo-atrum. No major cultivar is resistant to this disease. Two diploid interspecific potato clones, C287 and C545, were previously identified with consistently high levels of Verticillium wilt resistance and are thought to have the same ...
K. E. Frost, S. H. Jansky, D. I. Rouse
openaire +1 more source
Verticillium wilt is a serious disease of potato and is caused by the soil-borne fungi Verticillium dahliae and V. albo-atrum. No major cultivar is resistant to this disease. Two diploid interspecific potato clones, C287 and C545, were previously identified with consistently high levels of Verticillium wilt resistance and are thought to have the same ...
K. E. Frost, S. H. Jansky, D. I. Rouse
openaire +1 more source
Formation of 2n gametes in durum wheat haploids: Sexual polyploidization
Euphytica, 2003Allopolyploidy, resulting from interspecific and intergeneric hybridization accompanied by sexual doubling of chromosomes, has played a major role in the evolution of crop plants that sustain humankind. The allopolyploid species, including durum wheat, bread wheat, and oat, have developed a genetic control of chromosome pairing that confers on them ...
openaire +1 more source
Integration of transgenes into sexual polyploidization schemes for potato (Solanum tuberosum L.)
Euphytica, 2003Summary Most potato transgenic research has focused on development of resistance to pathogens and modification of potato physiology. Many transgenes, particularly those conferring pathogen resistance, could substantially lower potato production costs in developing countries.
Johnson, A., Veilleux, R.
openaire +2 more sources
Growth and sexual maturation in diploid and polyploid salamanders (genus Ambystoma)
Canadian Journal of Zoology, 1989On Pelee Island, Ontario, mole salamanders, Ambystoma laterale and Ambystoma texanum, coexist with their diploid, triploid, and tetraploid hybrids. In an initial study, A. laterale and hybrid larvae were raised in groups, but from metamorphosis to 5 months postmetamorphosis, individuals were raised in isolation. In a second study, A.
Lawrence E. Licht, James P. Bogart
openaire +1 more source