Oil collecting bees and Byrsonima cydoniifolia A. Juss. (Malpighiaceae) interactions: the prevalence of long-distance cross pollination driving reproductive success

Oil-collecting bees are the natural pollinators of oil-flower plants, but little is known about the pollination process and the effectiveness of their pollination service to the reproductive success of their host plants. In species of Byrsonima the reproductive system have been described as auto-compatible or self-incompatible. We studied the reproductive system of Byrsonima cydoniifolia, the fructification by means of short, medium and long-distance cross pollinations, the morphology and floral biology and the pollination interactions with species of oil-collecting bees. By means of controlled pollinations we found self-incompatibility caused by abortion of most self-pollinated flowers and demonstrated that the prevailing cross pollination ensuring the reproductive success of B. cydoniifolia is the long-distance cross pollination and Centridini bees; Epicharis nigrita, particularly, are the pollinators promoting the gene flow between genetically distinct populations.

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Studies of the floral biology and reproductive system of Brassica napus L.(Cruciferae)

Brazilian Archives of Biology and Technology ◽

10.1590/s1516-89132000000100014 ◽

2000 ◽

Vol 43 (1) ◽

pp. 111-117 ◽

Cited By ~ 13

Author(s):

Rosilda Mara Mussury ◽

Wedson Desidério Fernandes

Keyword(s):

Brassica Napus ◽

Reproductive System ◽

Reproductive Strategies ◽

Floral Biology ◽

Brassica Napus L ◽

Cross Pollination

Studies of the floral biology of canola were accomplished with the objective of enlarging the system and reproductive strategies knowledge of its CTC-4 cultivar in Dourados, Centerwest, Brazil. Brassica napus is self pollinated, presenting however, many resources for the allogamy accomplishment, e.g., abundant pollen, nectar and scent production. The smaller anther were responsible for the production of fruit with smaller and less growth seeds, when compared to the autogamy, autopollination and cross pollination tests.

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Reproductive biology and production of seeds and seedlings of Campomanesia pubescens (DC.) O. Berg.

Journal of Seed Science ◽

10.1590/2317-1545v39n3174807 ◽

2017 ◽

Vol 39 (3) ◽

pp. 272-279 ◽

Cited By ~ 2

Author(s):

Sandra dos Santos Rodrigues ◽

Adriana de Oliveira Fidalgo ◽

Cláudio José Barbedo

Keyword(s):

Plant Breeding ◽

Seed Production ◽

Reproductive System ◽

Floral Biology ◽

Reproductive Systems ◽

Paulo State ◽

Cross Pollination ◽

Fundamental Process ◽

Biological Reserve

Abstract: Pollination is a fundamental process to produce food and maintain biodiversity in natural areas, since the production of seeds is related to its efficiency. Studies can determine the influence of reproductive systems on seed and seedlings quality and, consequently, on the structure of populations, helping the management, plant breeding and preservation of species. Campomanesia pubescens (DC.) O. Berg. (guabiroba) is a Brazilian shrub, pollinated by bees and occasionally by dipterans. This work aimed at evaluating the influence of pollination and reproductive system on seed production and germination and on the seedlings quality of C. pubescens. Phenology and floral biology were studied, and fruits from controlled pollinations were collected, in the Mogi Guaçu Biological Reserve, São Paulo State. The germination of seeds originated from self- and cross-pollination were analyzed, as well as the development of seedlings up to 180 days after germination. Seeds from self-pollination produced seedlings with lower development than the ones from cross-pollination, and they were more susceptible to mortality in laboratory and in greenhouse.

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Temporal changes in reproductive success and optimal breeding decisions in a long-distance migratory bird

Scientific Reports ◽

10.1038/s41598-020-78565-y ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Cynthia Reséndiz-Infante ◽

Gilles Gauthier

Keyword(s):

Reproductive Success ◽

Clutch Size ◽

Environmental Changes ◽

Migratory Bird ◽

Laying Date ◽

Negative Consequences ◽

Breeding Phenology ◽

Additional Time ◽

Long Distance ◽

Seasonal Decline

AbstractMany avian migrants have not adjusted breeding phenology to climate warming resulting in negative consequences for their offspring. We studied seasonal changes in reproductive success of the greater snow goose (Anser caerulescens atlantica), a long-distance migrant. As the climate warms and plant phenology advances, the mismatch between the timing of gosling hatch and peak nutritive quality of plants will increase. We predicted that optimal laying date yielding highest reproductive success occurred earlier over time and that the seasonal decline in reproductive success increased. Over 25 years, reproductive success of early breeders increased by 42%, producing a steeper seasonal decline in reproductive success. The difference between the laying date producing highest reproductive success and the median laying date of the population increased, which suggests an increase in the selection pressure for that trait. Observed clutch size was lower than clutch size yielding the highest reproductive success for most laying dates. However, at the individual level, clutch size could still be optimal if the additional time required to acquire nutrients to lay extra eggs is compensated by a reduction in reproductive success due to a delayed laying date. Nonetheless, breeding phenology may not respond sufficiently to meet future environmental changes induced by warming temperatures.

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Cytological Observation and Transcriptome Comparative Analysis of Self-Pollination and Cross-Pollination in Dendrobium Officinale

Genes ◽

10.3390/genes12030432 ◽

2021 ◽

Vol 12 (3) ◽

pp. 432

Author(s):

Yaling Chen ◽

Benchang Hu ◽

Fantao Zhang ◽

Xiangdong Luo ◽

Jiankun Xie

Keyword(s):

Pollen Tubes ◽

The Self ◽

Dendrobium Officinale ◽

Self Incompatibility ◽

Related Gene ◽

Cytological Observation ◽

Lectin Receptor ◽

Cross Pollination ◽

Self Pollination ◽

Medicinal Value

Dendrobium officinale is a rare and traditional medicinal plant with high pharmacological and nutritional value. The self-incompatibility mechanism of D. officinale reproductive isolation was formed in the long-term evolution process, but intraspecific hybridization of different germplasm resources leads to a large gap in the yield, quality, and medicinal value of D. officinale. To investigate the biological mechanism of self-incompatibility in D. officinale, cytological observation and the transcriptome analysis was carried out on the samples of self-pollination and cross-pollination in D. officinale. Results for self-pollination showed that the pollen tubes could grow in the style at 2 h, but most of pollen tubes stopped growing at 4 h, while a large number of cross-pollinated pollen tubes grew along the placental space to the base of ovary, indicating that the self-incompatibility of D. officinale may be gametophyte self-incompatibility. A total of 63.41 G basesum of D. officinale style samples from non-pollinated, self-pollination, and cross-pollination by RNA-seq were obtained, and a total of 1944, 1758, and 475 differentially expressed genes (DEGs) in the comparison of CK (non-pollinated) vs. HF (cross-pollination sample), CK vs. SF (self-pollination sample) and SF vs. HF were identified, respectively. Forty-one candidate genes related to self-incompatibility were found by function annotation of DEGs, including 6 Ca2+ signal genes, 4 armed repeat containing (ARC) related genes, 11 S-locus receptor kinase (SRK) related genes, 2 Exo70 family genes, 9 ubiquitin related genes, 1 fatty acid related gene, 6 amino acid-related genes, 1 pollen-specific leucine-rich repeat extensin-like protein (LRX) related gene and 1 lectin receptor-like kinases (RLKs) related gene, showed that self-incompatibility mechanism of D. officinale involves the interaction of multiple genes and pathways. The results can provide a basis for the study of the self-incompatibility mechanism of D. officinale, and provide ideas for the preservation and utilization of high-quality resources of D. officinale.

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Long distance pollen-mediated gene flow at a landscape level: the weed beet as a case study

Molecular Ecology ◽

10.1111/j.1365-294x.2007.03448.x ◽

2007 ◽

Vol 16 (18) ◽

pp. 3801-3813 ◽

Cited By ~ 51

Author(s):

STÉPHANE FÉNART ◽

FRÉDÉRIC AUSTERLITZ ◽

JOËL CUGUEN ◽

JEAN-FRANÇOIS ARNAUD

Keyword(s):

Gene Flow ◽

Long Distance ◽

Landscape Level

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The effects of inbreeding, outbreeding and long-distance gene flow on survivorship in North American populations of Silene vulgaris

Journal of Ecology ◽

10.1111/j.1365-2745.2005.01090.x ◽

2006 ◽

Vol 94 (1) ◽

pp. 98-109 ◽

Cited By ~ 28

Author(s):

MAIA F. BAILEY ◽

DAVID E. McCAULEY

Keyword(s):

Gene Flow ◽

North American ◽

Silene Vulgaris ◽

Long Distance

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Pollination requirements of seeded and seedless mini watermelon varieties cultivated under protected environment

Pesquisa Agropecuária Brasileira ◽

10.1590/s0100-204x2015000100005 ◽

2015 ◽

Vol 50 (1) ◽

pp. 44-53 ◽

Cited By ~ 3

Author(s):

Isac Gabriel Abrahão Bomfim ◽

Antônio Diego de Melo Bezerra ◽

Alexandre Campos Nunes ◽

Breno Magalhães Freitas ◽

Fernando Antonio Souza de Aragão

Keyword(s):

Fruit Quality ◽

Fruit Set ◽

Floral Biology ◽

Cross Pollination ◽

Diploid Pollen

The objective of this work was to evaluate the floral biology and pollination requirements of seeded and seedless mini watermelon varieties, and to determine the best varieties to cultivate under protected environment. Three seedless (HA-5106, HA-5158, and HA-5161) and two seeded (Minipol and Polimore) genotypes were tested. Flowers were monitored from the pre-anthesis stage to senescence, and fruit quality was also evaluated. The evaluated treatments were hand-geitonogamous pollination (MG), cross-pollination with pollen from the Polimore variety (MCP), cross-pollination with pollen from the Minipol variety (MCM), and restricted pollination. All varieties had monoecious plants with diclinous flowers, and the stigmas remained receptive throughout anthesis. Fruit set rates of 84.62% (MG), 61.54% (MCP), 48% (MCM), and 0% (restricted) were obtained for seeded varieties, but of 0% (MG), 76.36% (MCP), 82.69% (MCM), and 0% (restricted) for seedless varieties. Fruits did not differ in quality among treatments within each genotype. Therefore, all the studied varieties require a pollination agent and diploid pollen for fruit set to occur, regardless of the donor variety; and Minipol or Polimore with HA-5106 or HA-5158 are the varieties recommended for cultivation in protected environment.

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Camelina (Camelina sativa L. Crantz) Crop Performance, Insect Pollinators, and Pollen Dispersal in the Northeastern US

10.1101/756619 ◽

2019 ◽

Author(s):

Richard Rizzitello ◽

Chuan-Jie Zhang ◽

Carol Auer

Keyword(s):

Gene Flow ◽

Honey Bees ◽

Pollen Dispersal ◽

Camelina Sativa ◽

Genetically Engineered ◽

Oilseed Crop ◽

Crop Failure ◽

Long Distance ◽

Insect Visitation ◽

Pollinating Insects

AbstractCamelina sativa (camelina) is an oilseed crop in the Brassicaceae that has been genetically engineered for the production of biofuels, dietary supplements, and other industrial compounds. Cultivation in North America is both recent and limited, so there are gaps in knowledge regarding yield, weed competition, and pollen-mediated gene flow. For these experiments, camelina ‘SO-40’ was grown for three years without weed control. Spring-sown camelina was harvested at 80-88 days with ∼1200 growing degree days (GDD) with yields of 425-508 kg/hectare. Camelina yields were the same with or without weeds, showing competitive ability in low-management conditions. Crop failure in 2015 was associated with delayed rainfall and above-average temperatures after seeding. Camelina flowers attracted pollinating insects from the Hymenoptera, Diptera, Lepidoptera, and Coleoptera. Hymenoptera included honey bees (Apis melifera), mining bees (Andrenidae), sweat bees (Halictidae), bumble bees (Bombus spp.) and leaf cutter bees (Megachilidae). Insect visitation on camelina flowers was associated with modest increases in seed yield. Honey bees comprised 28-33% of all pollinators and were shown to carry camelina pollen on their legs. Air sampling showed that wind-blown pollen was present at low concentrations at 9 m beyond the edges of the field. These experiments demonstrated for the first time that camelina pollen dispersal could occur through honey bees or wind, although bee activity would likely be more significant for long-distance gene flow.

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Spatial population genomics of a recent mosquito invasion

10.1101/2020.11.30.405191 ◽

2020 ◽

Author(s):

Thomas L Schmidt ◽

T. Swan ◽

Jessica Chung ◽

Stephan Karl ◽

Samuel Demok ◽

...

Keyword(s):

Gene Flow ◽

Population Genomics ◽

Isolation By Distance ◽

Spatial Genetic Structure ◽

Nucleotide Polymorphisms ◽

Discrete Events ◽

Long Distance ◽

Population Genomic ◽

Asian Tiger ◽

Study Designs

AbstractPopulation genomic approaches can characterise dispersal across a single generation through to many generations in the past, bridging the gap between individual movement and intergenerational gene flow. These approaches are particularly useful when investigating dispersal in recently altered systems, where they provide a way of inferring long-distance dispersal between newly established populations and their interactions with existing populations. Human-mediated biological invasions represent such altered systems which can be investigated with appropriate study designs and analyses. Here we apply temporally-restricted sampling and a range of population genomic approaches to investigate dispersal in a 2004 invasion of Aedes albopictus (the Asian tiger mosquito) in the Torres Strait Islands (TSI) of Australia. We sampled mosquitoes from 13 TSI villages simultaneously and genotyped 373 mosquitoes at genome-wide single nucleotide polymorphisms (SNPs): 331 from the TSI, 36 from Papua New Guinea (PNG), and 4 incursive mosquitoes detected in uninvaded regions. Within villages, spatial genetic structure varied substantially but overall displayed isolation by distance and a neighbourhood size of 232–577. Close kin dyads revealed recent movement between islands 31–203 km apart, and deep learning inferences showed incursive Ae. albopictus had travelled to uninvaded regions from both adjacent and non-adjacent islands. Private alleles and a coancestry matrix indicated direct gene flow from PNG into nearby islands. Outlier analyses also detected four linked alleles introgressed from PNG, with the alleles surrounding 12 resistance-associated cytochrome P450 genes. By treating dispersal as both an intergenerational process and a set of discrete events, we describe a highly interconnected invasive system.

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