Results 81 to 90 of about 1,463 (223)

Inbreeding Depression Manifested in Progeny From Fragmented Populations of the Wind‐Pollinated Dioecious Conifer Afrocarpus gracilior (Pilg.) C. N. Page

Ecology and Evolution, Volume 15, Issue 2, February 2025.
Forest fragmentation in Afrocarpus gracilior reduced genetic diversity and caused significant inbreeding depression, especially in smaller populations. Progeny from these populations showed lower genetic diversity, reduced germination rates, slower growth, and diminished survival. Seeds should be sourced from larger, genetically diverse populations for
Nigussu Begashaw Abate, Hewan Demissie Degu, Marie Kalousová, Tesfaye Abebe   +3 more
wiley   +1 more source

Influence of Environment on the Floral Sex Ratio of Monoecious Plants [PDF]

Evolution, 1981
Both theoretical and empirical data suggest that sessile, simultaneous hermaphroditic individuals growing in patchy environments may experience unequal reproductive success via male and female gametes depending on whether they occupy favorable or marginal sites (Schaffner, 1935; Heslop-Harrison, 1972; Freeman et al., 1976, 1980; Charnov and Bull, 1977;
D Carl, Freeman, E Durant, McArthur, K T, Harper, A C, Blauer   +3 more
openaire   +2 more sources

Toward a phylogenomic classification of magnoliids

American Journal of Botany, Volume 112, Issue 1, January 2025.
Abstract Premise Magnoliids are a strongly supported clade of angiosperms. Previous phylogenetic studies based primarily on analyses of a limited number of mostly plastid markers have led to the current classification of magnoliids into four orders and 18 families. However, uncertainty remains regarding the placement of several families.
Andrew J. Helmstetter, Zacky Ezedin, Elton John de Lírio, Sylvia M. de Oliveira, Lars W. Chatrou, Roy H. J. Erkens, Isabel Larridon, Kevin Leempoel, Olivier Maurin, Shyamali Roy, Alexandre R. Zuntini, William J. Baker, Thomas L. P. Couvreur, Félix Forest, Hervé Sauquet   +14 more
wiley   +1 more source

Floral Ontogeny and Sex Determination in Monoecious-type Persimmons [PDF]

Journal of the American Society for Horticultural Science, 1993
Patterns of floral differentiation were studied in two monoecious-type Japanese persimmon (Diospyros kaki L.) cultivars Hana-gosho and Kakiyama-gaki. In both cultivars, the pistillate and staminate floral primordium started to differentiate in early June, and differentiation progressed until ...
K. Yonemori, A. Sugiura, K. Tanaka, K. Kameda   +3 more
openaire   +1 more source

Front pages with contents of No. 58, 1997 [PDF]

, 1997
Front cover ...

core  

Slowdowns in diversification rates from real phylogenies may not be real [PDF]

, 2010
Studies of diversification patterns often find a slowing in lineage accumulation toward the present. This seemingly pervasive pattern of rate downturns has been taken as evidence for adaptive radiations, density-dependent regulation, and metacommunity ...
Becerra, Crisp, Gernhard, Good-Avila, Harmon, Hughes, Janssens, Kadereit, Kozak, Linder, Linder, Lledó, Lovette, Malcomber, McKenna, McPeek, McPeek, Merckx, Natalie Cusimano, Nee, Phillimore, Phillimore, Price, Pybus, Rabosky, Rabosky, Rabosky, Rabosky, Revell, Rüber, Sauquet, Schaefer, Smith, Susanne S. Renner, von Hagen, von Hagen, Weir, Weir, Zink   +38 more
core   +1 more source

Life cycle and molecular phylogeny of Vaucheria piloboloides (Vaucheriales, Xanthophyceae) from Sado Island, Japan

Phycological Research, Volume 72, Issue 4, Page 258-265, October 2024.
SUMMARY The siphonous, yellow–green alga Vaucheria piloboloides (Vaucheriales, Xanthophyceae) is the type species of the section Piloboloideae and is widely reported worldwide. Despite its taxonomic importance and broad range distribution, its detailed life cycle and molecular phylogenetic position are unknown.
Masakazu Hoshino, Satoru Tadokoro, Shingo Akita, Shinya Uwai   +3 more
wiley   +1 more source

Rethinking pathways to the dioecy–polyploidy association: Genera with many dioecious species have fewer polyploids

American Journal of Botany, Volume 111, Issue 8, August 2024.
Abstract Premise Numerous studies have found a positive association between dioecy and polyploidy; however, this association presents a theoretical conflict: While polyploids are predicted to benefit from self‐reproduction for successful establishment, dioecious species cannot self‐reproduce.
Wilhelm H. A. Osterman, Adrian Hill, James G. Hagan, Jeannette Whitton, Christine D. Bacon, Anne D. Bjorkman   +5 more
wiley   +1 more source

Geographical range in liverworts: does sex really matter? [PDF]

, 2016
AimWhy some species exhibit larger geographical ranges than others remains a fundamental, but largely unanswered, question in ecology and biogeography.
Cox, C. J., Desamore, Aurelie, Goffinet, B., Gradstein, S. Robbert, Laenen, Benjamin, Machac, Antonin, Patino, Jairo, Shaw, Blanka, Shaw, Jonathan, Vanderpoorten, Alain   +9 more
core   +1 more source

Per se performance of monoecious cucumber land races

ELECTRONIC JOURNAL OF PLANT BREEDING, 2020
A study was conducted in the Department of Vegetable Science, Tamil Nadu Agricultural University, Coimbatore to assess the performance of 39 monoecious cucumber land races. Number of primary branches were more in the local type Vennamuthupatti local (7.33) and the number of male flowers per plant was minimum in Amaravathi local (38.33).
openaire   +3 more sources