Results 61 to 70 of about 414 (161)

Cell cycle arrest characterizes the transition from a bisexual floral bud to a unisexual flower in Phoenix dactylifera [PDF]

open access: yes, 2010
International audience† Background and Aims: Phoenix dactylifera (date palm) is a dioecious species displaying strong dimorphism between pistillate and staminate flowers. The mechanisms involved in the development of unisexual flowers are as yet unknown.
Nathalie Chabrillange   +15 more
core   +1 more source

Sex Determination Diversity and Sex Chromosome Evolution in Poeciliid Fish [PDF]

open access: yes, 2009
International audiencePoeciliids, a family of live-bearing freshwater fish, including among others platyfish, swordtails and guppies, fully illustrate the diversity of genetic sex determination mechanisms observed in teleosts.
Schultheis, C.   +4 more
core   +1 more source

Presentation_1_Vitis Flower Sex Specification Acts Downstream and Independently of the ABCDE Model Genes.PDF [PDF]

open access: yes, 2018
The most discriminating characteristic between the cultivated Vitis vinifera subsp. vinifera and the wild-form Vitis vinifera subsp. sylvestris is their sexual system.
Maria M. R. Costa (5516789)   +7 more
core   +1 more source

Role of Pollinators in the Evolution of Dioecy from Distyly [PDF]

open access: yes, 1980
Although dioecy in flowering plants is mostly thought to have evolved because of its function as an outbreeding system (Lewis 1942; Stebbins 1950; Baker 1959; Charlesworth and Charlesworth 1978; and see Willson 1979), other possible explanations based on
Bawa, K. S.   +3 more
core   +1 more source

Pheromone independent unisexual development in Cryptococcus neoformans

open access: yesPLOS Genetics, 2017
The fungus Cryptococcus neoformans can undergo a-α bisexual and unisexual reproduction. Completion of both sexual reproduction modes requires similar cellular differentiation processes and meiosis. Although bisexual reproduction generates equal number of a and α progeny and is far more efficient than unisexual reproduction under mating-inducing ...
Rachana Gyawali   +6 more
openaire   +4 more sources

Description and ecology of new Pijnackeria stick insects: four bisexual species and a triploid parthenogen, with their phyletic relationships [PDF]

open access: yes, 2013
Recently, the Iberian stick-insect genus Pijnackeria has been erected by splitting Leptynia Pantel on the basis of several distinguishing features. In addition to P.
PASSAMONTI, MARCO   +2 more
core   +1 more source

Sex Ratio and Unisexual Sterility in Hybrid Animals. [PDF]

open access: yesJournal of Genetics, 1922
When in theF 1 offspring of a cross between two animal species or races one sex is absent, rare, or sterile, that sex is always the heterozygous sex.
openaire   +1 more source

Taxonomic and Phylogenetic Assessment of the Euphorbiaceae: A Review [PDF]

open access: yes, 2011
The family Euphorbiaceae is assessed taxonomically and phylogenetically in the light of different disciplines of botany. It lacks anatomical homogenity, probable because of diverse habit and habitat.
D. A. Patil2, H. A. Thakur1* and
core   +1 more source

Pseudomale behaviour and spontaneous masculinization in the all-female teleost Poecilia formosa (Teleostei: Poeciliidae) [PDF]

open access: yes, 1992
Pseudosexual behaviour is a rare phenomenon associated with unisexuality in vertebrates. In the gynogenetic, all-female teleost Poecilia formosa, rare individuals occur that resemble males of closely related gonochoristic species both in behaviour and ...
Schlupp, Ingo   +5 more
core  

Architectural traits constrain the evolution of unisexual flowers and sexual segregation within inflorescences: an interspecific approach [PDF]

open access: yes, 2019
Male and female unisexual flowers have repeatedly evolved from the ancestral bisexual flowers in different lineages of flowering plants. This sex specialization in different flowers often occurs within inflorescences.
Anderberg, Arne Alfred,   +4 more
core   +1 more source

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