Selective seed abortion increases offspring survival in Cynoglossum officinale (Boraginaceae)

2001 ◽  
Vol 88 (6) ◽  
pp. 1033-1040 ◽  
Author(s):  
Chantal Melser ◽  
Peter G. L. Klinkhamer
Keyword(s):  
Seed Abortion ◽  
Offspring Survival ◽  
Cynoglossum Officinale

Intervening in sibling competition for assimilates by controlled pollination prevents seed abortion under postpollination drought in maize

2020 ◽  
Vol 43 (4) ◽  
pp. 903-919 ◽  
Author(s):  
Si Shen ◽  
Xiao‐Gui Liang ◽  
Li Zhang ◽  
Xue Zhao ◽  
Yun‐Peng Liu ◽  
...  
Keyword(s):  
Sibling Competition ◽  
Seed Abortion ◽  
Controlled Pollination

scholarly journals VvHDZ28 positively regulate SA biosynthesis during seed abortion in Thompson Seedless

2021 ◽  
Author(s):  
Zhiqian Li ◽  
Yuntong Jiao ◽  
Chen Zhang ◽  
Mengru Dou ◽  
Kai Weng ◽  
...  
Keyword(s):  
Seed Abortion ◽  
Thompson Seedless

Multi-scale habitat selection affects offspring survival in a precocial species

Oecologia ◽  
2013 ◽  
Vol 173 (4) ◽  
pp. 1249-1259 ◽  
Author(s):  
P. M. Bloom ◽  
R. G. Clark ◽  
D. W. Howerter ◽  
L. M. Armstrong
Keyword(s):  
Habitat Selection ◽  
Offspring Survival ◽  
Multi Scale

scholarly journals Polygyny and Extra-Pair Paternity in a Population of Southwestern Willow Flycatchers

The Condor ◽  
2006 ◽  
Vol 108 (3) ◽  
pp. 571-578
Author(s):  
Talima Pearson ◽  
Mary J. Whitfield ◽  
Tad C. Theimer ◽  
Paul Keim
Keyword(s):  
Reproductive Success ◽  
Microsatellite Markers ◽  
Mating Strategy ◽  
Male Reproductive Success ◽  
Offspring Survival ◽  
Extra Pair Paternity ◽  
Study Population ◽  
Willow Flycatcher ◽  
Empidonax Traillii ◽  
Disproportionate Number

Abstract Although polygyny can potentially increase male reproductive success, the benefits of this strategy could be offset by losses to extra-pair paternity or reduced offspring survival. We developed microsatellite markers to assess the influence of extra-pair offspring (EPO) on reproductive success and paternity in monogamous and polygynous pairs of the facultatively polygynous Southwestern Willow Flycatcher (Empidonax traillii extimus). Based on genotypes of 140 offspring from 56 clutches over six years, 14% of nestlings in our study population were extra-pair offspring, with 23% of all successful nests containing at least one EPO. We found that polygynous males produced 2.11 ± 0.35 offspring per season, compared to 1.15 ± 0.18 for monogamous males. This increased reproductive success was due primarily to the increased number of nests of polygynous males, as the number of offspring per pair did not differ between monogamous and polygynous males. Twenty of the 140 genotyped nestlings were extra-pair offspring. Sires could be assigned to 16 of these; one polygynous male sired two EPO in one nest, two monogamous males sired eight EPO in two nests, and four nonterritorial males sired six EPO in four nests. Overall, these results indicate that in this population, females of polygynous males did not raise a disproportionate number of EPO as a result of the polygynous mating strategy of their mate, and that both territorial and nonterritorial males sired EPO.

Intra-fruit seed abortion in a wind dispersed tree,Dalbergia sissoo Roxb: Proximate mechanisms

1996 ◽  
Vol 9 (5) ◽  
pp. 273-278 ◽  
Author(s):  
B. Mohan Raju ◽  
R. Uma Shaanker ◽  
K. N. Ganeshaiah
Keyword(s):  
Seed Abortion ◽  
Dalbergia Sissoo ◽  
Proximate Mechanisms

scholarly journals Maternal Dppa2 and Dppa4 are dispensable for zygotic genome activation but important for offspring survival

Development ◽  
2021 ◽  
Vol 148 (24) ◽  
Author(s):  
Oana Kubinyecz ◽  
Fatima Santos ◽  
Deborah Drage ◽  
Wolf Reik ◽  
Melanie A. Eckersley-Maslin
Keyword(s):  
Null Allele ◽  
Embryonic Stem ◽  
Offspring Survival ◽  
Zygotic Genome Activation ◽  
Molecular Events ◽  
Genome Activation ◽  
Mitotic Chromatin ◽  
Zygotic Genome

ABSTRACT Zygotic genome activation (ZGA) represents the initiation of transcription following fertilisation. Despite its importance, we know little of the molecular events that initiate mammalian ZGA in vivo. Recent in vitro studies in mouse embryonic stem cells have revealed developmental pluripotency associated 2 and 4 (Dppa2/4) as key regulators of ZGA-associated transcription. However, their roles in initiating ZGA in vivo remain unexplored. We reveal that Dppa2/4 proteins are present in the nucleus at all stages of preimplantation development and associate with mitotic chromatin. We generated conditional single and double maternal knockout mouse models to deplete maternal stores of Dppa2/4. Importantly, Dppa2/4 maternal knockout mice were fertile when mated with wild-type males. Immunofluorescence and transcriptome analyses of two-cell embryos revealed that, although ZGA took place, there were subtle defects in embryos that lacked maternal Dppa2/4. Strikingly, heterozygous offspring that inherited the null allele maternally had higher preweaning lethality than those that inherited the null allele paternally. Together, our results show that although Dppa2/4 are dispensable for ZGA transcription, maternal stores have an important role in offspring survival, potentially via epigenetic priming of developmental genes.

scholarly journals Polyandry enhances offspring survival in an infanticidal species

2009 ◽  
Vol 6 (1) ◽  
pp. 24-26 ◽  
Author(s):  
Ines Klemme ◽  
Hannu Ylönen
Keyword(s):  
Mating Systems ◽  
Multiple Mating ◽  
Empirical Test ◽  
Myodes Glareolus ◽  
Offspring Survival ◽  
Bank Voles ◽  
Female Counterstrategy ◽  
Fitness Benefits ◽  
Selection For ◽  
Genetic Fitness

The adaptive significance of polyandry is an intensely debated subject in sexual selection. For species with male infanticidal behaviour, it has been hypothesized that polyandry evolved as female counterstrategy to offspring loss: by mating with multiple males, females may conceal paternity and so prevent males from killing putative offspring. Here we present, to our knowledge, the first empirical test of this hypothesis in a combined laboratory and field study, and show that multiple mating seems to reduce the risk of infanticide in female bank voles Myodes glareolus . Our findings thus indicate that females of species with non-resource based mating systems, in which males provide nothing but sperm, but commit infanticide, can gain non-genetic fitness benefits from polyandry.

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