Results 131 to 140 of about 921 (179)

Gynogenesis in Polish Onion Cultivars

Journal of Plant Physiology, 2000
Summary During the two years ofthe studies (1997–1998) 32802 flower buds ofthirty Polish onion genotypes were plated on different media. In total 310 embryos (0.9 %) were obtained, out of which more than a half underwent regeneration. It was established that 3.5–4.5 mm long flower buds were the most responsive to gynogenesis.
Barbara Michalik, Adela Adamus, Ewa Nowak   +2 more
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The Evolutionary Ecology of Gynogenesis

Annual Review of Ecology, Evolution, and Systematics, 2005
▪ Abstract  Most metazoans engage in recombination every generation. In theory this is associated with considerable cost, such as the production of males, so that asexual organisms, which do not pay this cost, should be able to invade populations of sexuals.
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Gynogenesis in the vine cacti Hylocereus and Selenicereus (Cactaceae)

Plant Cell Reports, 2009
Gynogenesis was investigated on the allotetraploid Selenicereus megalanthus and the diploid Hylocereus polyrhizus and Hylocereus undatus vine cactus species. Unpollinated ovules from developing flower buds containing microspores at middle uninucleate developmental stage were cultured on MS basal medium containing 2,4-D/TDZ with different sucrose ...
Reinerio Benega, Garcia, Aroldo, Cisneros, Bert, Schneider, Noemi, Tel-Zur   +3 more
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Gynogenesis in Salamanders Related to Ambystoma jeffersonianum

Science, 1964
The oocytes of naturally occurring triploid females of the Ambystoma jeffersonianum complex each contain 84 lampbrush chromosomes. This constitutes hexaploidy ( n = 14). The chromosomes are joined into pairs by chiasmata and form 42 bivalents.
H C, MACGREGOR, T M, UZZELL
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Induced Gynogenesis in Black Crappie

North American Journal of Aquaculture, 2000
Abstract This study reports the results of initial experiments on induced diploid gynogenesis in black crappie Pomoxis nigromaculatus. White bass Morone chrysops were an effective sperm donor for gynogenetic experiments with black crappies. White bass spermatozoa fertilized black crappie eggs, but hybrid larvae were not viable and died after hatching ...
Boris Gomelsky, Steven D. Mims, Richard J. Onders, William L. Shelton, Konrad Dabrowski, Mary Ann Garcia-Abiado   +5 more
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Androgenesis, gynogenesis, and parthenogenesis haploids in cucurbit species

Plant Cell Reports, 2016
Haploids and doubled haploids are critical components of plant breeding. This review is focused on studies on haploids and double haploids inducted in cucurbits through in vitro pollination with irradiated pollen, unfertilized ovule/ovary culture, and anther/microspore culture during the last 30 years, as well as comprehensive analysis of the main ...
Yan-Qi, Dong, Wei-Xing, Zhao, Xiao-Hui, Li, Xi-Cun, Liu, Ning-Ning, Gao, Jin-Hua, Huang, Wen-Ying, Wang, Xiao-Li, Xu, Zhen-Hai, Tang   +8 more
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Induced meiotic gynogenesis in shovelnose sturgeon

Aquaculture International, 1998
Gynogenesis was induced in three shovelnose sturgeon (Scaphirhynchus pIatorynchus) by heat shock after egg activation with UV-treated paddlefish (Polyodon spathula) milt. Ultraviolet dosage (J m−2) for the pooled milt samples was calculated using the following linear regression equation: Dosage = 2405.27 − 352.80X 19.78X2 (X = percent transmittance of ...
Steven D. Mims, William L. Shelton
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Gynogenesis in Hybrids within the Pleuronectidae

1974
Hybrids between different genera within the flatfish family Pleuronectidae are commonplace. Naturally-occurring hybrids between the plaice (Pleuronectes platessa) and the flounder (Platichthys flesus) are common in the Baltic, and can be produced with ease by artificial fertilization of plaice eggs with flounder spermatozoa (Pape, 1935; von Ubisch ...
C. E. Purdom, R. F. Lincoln
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Gynogenesis induction in Allium tuberosum L.

Current Opinion in Biotechnology, 2013
Abstract Not ...
Çelebi Toprak, Fezviye, Kaska, Arzu, Alan, Ali Ramazan   +2 more
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Gynogenesis and Triploidy in the Viviparous Fish Poeciliopsis

Science, 1967
Three all-female strains of the viviparous fish Poeciliopsis occur in the Río Fuerte of Sinaloa, Mexico. Poeciliopsis lucida , a bisexual species, provides sperm for these monosexual forms which I designate as Cx, Cy, and Cz.
openaire   +2 more sources