On the Adaptive Value of Sexual Dimorphism: II. Unisexuality [PDF]
Evolution; International Journal of Organic Evolution, 1969 The first part of this paper2 considered the rate of union in gamete populations, uniformly distributed and in numerical equilibrium. The cases of like gametes, called Isogamy, and that of sexually differentiated gametes, called Anisogamy, were both analyzed.
Francesco M Scudo
exaly +7 more sources
Flower development and sex determination in horticultural crops [PDF]
Fruit Research, 2022 Horticultural crops are extremely valuable due to their high nutritional value, and fruits, in particular, provide indispensable vitamins and minerals.
Jiakun Zheng, Rui Xia
doaj +3 more sources
Probing the floral developmental stages, bisexuality and sex reversions in castor (Ricinus communis L.) [PDF]
Scientific Reports, 2021 Castor (Ricinus communis L) is an ideal model species for sex mechanism studies in monoecious angiosperms, due to wide variations in sex expression. Sex reversion to monoecy in pistillate lines, along with labile sex expression, negatively influences ...
Sujatha Thankeswaran Parvathy +2 more
doaj +2 more sources
Analysis of a possible independent origin of triploid
Frontiers in Zoology, 2007 Background Unisexuality, or all female reproduction, is rare among vertebrates. Studying these exceptional organisms may give useful information with respect to the evolution and maintenance of sexual reproduction.
de León Francisco +4 more
doaj +3 more sources
Comparative Chromosome Painting and NOR Distribution Suggest a Complex Hybrid Origin of Triploid Lepidodactylus lugubris (Gekkonidae). [PDF]
PLoS ONE, 2015 Parthenogenesis, unisexuality and triploidy are interesting but poorly studied phenomena occurring in some reptile species. The mourning gecko (Lepidodactylus lugubris) represents a complex of diploid and triploid parthenogenetic mostly all-female ...
Vladimir A Trifonov +6 more
doaj +4 more sources
All-male hybrids of a tetrapod Pelophylax esculentus share its origin and genetics of maintenance [PDF]
Biology of Sex Differences, 2018 Background Sexual parasites offer unique insights into the reproduction of unisexual and sexual populations. Because unisexuality is almost exclusively linked to the female sex, most studies addressed host-parasite dynamics in populations where sperm ...
Marie Doležálková-Kaštánková +5 more
doaj +2 more sources
The role of PCD in sexual dimorphism of dioecious Spinacia oleracea L.
Journal of Advanced Research in Natural and Applied Sciences, 2023 The formation of non-hermaphroditic, i.e. male or female, flowers is a rare event in the plant kingdom. S. oleracea provides an ideal unisexual floral developmental system for studying the structural development of floral organs.
Asuman Karadeniz Pekgöz +2 more
doaj +1 more source
Sex determination in annual fishes: searching for the master sex-determining gene in Austrolebias charrua (Cyprinodontiformes, Rivulidae) [PDF]
Genetics and Molecular Biology, 2014 Evolution of sex determination and differentiation in fishes involves a broad range of sex strategies (hermaphroditism, gonochorism, unisexuality, environmental and genetic sex determination). Annual fishes inhabit temporary ponds that dry out during the
María José Arezo +4 more
doaj +3 more sources
Doing it alone : unisexual reproduction in filamentous ascomycete fungi [PDF]
, 2021 Unisexuality in fungi is the result of sexual reproduction in a single isolate that harbors genes associated with only a single mating type. To date, unisexual reproduction has been described in only three genera of filamentous fungi.
Wingfield, Brenda D. +7 more
core +1 more source
Inside-out flowers of Lacandonia brasiliana (Triuridaceae) provide new insights into fundamental aspects of floral patterning [PDF]
PeerJ, 2016 Background and Aims. A recently described Brazilian species, Lacandonia brasiliana, shares with its longer established putative sister species from Mexico, L.
Paula J. Rudall +2 more
doaj +2 more sources