Evidence for the genetic basis and epistatic interactions underlying ocean‐ and river‐maturing ecotypes of Pacific Lamprey ( Entosphenus tridentatus ) returning to the Klamath River, California

2019 ◽  
Author(s):  
Keith A. Parker ◽  
Jon E. Hess ◽  
Shawn R. Narum ◽  
Andrew P. Kinziger
Keyword(s):  
Genetic Basis ◽  
Epistatic Interactions ◽  
Pacific Lamprey ◽  
Klamath River ◽  
Entosphenus Tridentatus

scholarly journals Predicting larval metamorphosis of Pacific lamprey Entosphenus tridentatus through measurements of length and mass

2020 ◽  
Vol 97 (3) ◽  
pp. 804-816
Author(s):  
Timothy A. Whitesel ◽  
Michelle McGree ◽  
Gregory S. Silver
Keyword(s):  
Larval Metamorphosis ◽  
Pacific Lamprey ◽  
Entosphenus Tridentatus

scholarly journals The role of APETALA1 in petal number robustness

eLife ◽  
2018 ◽  
Vol 7 ◽  
Author(s):  
Marie Monniaux ◽  
Bjorn Pieper ◽  
Sarah M McKim ◽  
Anne-Lise Routier-Kierzkowska ◽  
Daniel Kierzkowski ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Genetic Variation ◽  
Reproductive Success ◽  
Genetic Basis ◽  
Phenotypic Expression ◽  
Specific Difference ◽  
Closely Related Species ◽  
Epistatic Interactions ◽  
Species Specific

Invariant floral forms are important for reproductive success and robust to natural perturbations. Petal number, for example, is invariant in Arabidopsis thaliana flowers. However, petal number varies in the closely related species Cardamine hirsuta, and the genetic basis for this difference between species is unknown. Here we show that divergence in the pleiotropic floral regulator APETALA1 (AP1) can account for the species-specific difference in petal number robustness. This large effect of AP1 is explained by epistatic interactions: A. thaliana AP1 confers robustness by masking the phenotypic expression of quantitative trait loci controlling petal number in C. hirsuta. We show that C. hirsuta AP1 fails to complement this function of A. thaliana AP1, conferring variable petal number, and that upstream regulatory regions of AP1 contribute to this divergence. Moreover, variable petal number is maintained in C. hirsuta despite sufficient standing genetic variation in natural accessions to produce plants with four-petalled flowers.

Marine biology of the pacific lamprey Entosphenus tridentatus

2019 ◽  
Vol 29 (4) ◽  
pp. 767-788 ◽  
Author(s):  
Benjamin J. Clemens ◽  
Laurie Weitkamp ◽  
Kevin Siwicke ◽  
Joy Wade ◽  
Julianne Harris ◽  
...  
Keyword(s):  
Marine Biology ◽  
Pacific Lamprey ◽  
The Pacific ◽  
Entosphenus Tridentatus

The potential for rapid speciation in plants

Genome ◽  
1989 ◽  
Vol 31 (1) ◽  
pp. 203-210 ◽  
Author(s):  
Mark R. Macnair
Keyword(s):  
Reproductive Isolation ◽  
Genetic Architecture ◽  
Genetic Basis ◽  
Natural Populations ◽  
Direct Result ◽  
Epistatic Interactions ◽  
Genetic Changes ◽  
Rapid Speciation ◽  
Genetic Revolution ◽  
Self Fertilization

Speciation involves both ecological adaptation and reproductive isolation. This paper reviews various ways in which plants could achieve reproductive isolation as a direct result of adaptation to prevailing conditions, particularly through changes in flowering time, the adoption of self-fertilization, and changes in flower morphology so that different pollinators are attracted. These characters are likely to have a relatively simple genetic architecture, and there must frequently be genetic variance for them in natural populations. It is argued that speciation could thus be initiated swiftly in plants, without any need for a "genetic revolution" or the fixation of genes with strongly epistatic interactions. Postmating barriers also often have a simple genetic basis in plants, and so could also evolve swiftly if associated with an adaptive response. The nature of the genetic changes associated with speciation in a number of recent speciation events in Layia, Stephanomeria, and Mimulus is reviewed.Key words: Speciation, adaptation, reproductive isolation.

Occurrence of larval Pacific lamprey Entosphenus tridentatus from Japan, detected by random amplified polymorphic DNA (RAPD) analysis

2005 ◽  
Vol 52 (3) ◽  
pp. 297-301 ◽  
Author(s):  
Yuji Yamazaki ◽  
Norio Fukutomi ◽  
Norio Oda ◽  
Koichi Shibukawa ◽  
Yasuo Niimura ◽  
...  
Keyword(s):  
Rapd Analysis ◽  
Random Amplified Polymorphic Dna ◽  
Pacific Lamprey ◽  
Entosphenus Tridentatus

Using genetic pedigree reconstruction to estimate effective spawner abundance from redd surveys: an example involving Pacific lamprey (Entosphenus tridentatus)

2017 ◽  
Vol 74 (10) ◽  
pp. 1646-1653 ◽  
Author(s):  
S.L. Whitlock ◽  
L.D. Schultz ◽  
C.B. Schreck ◽  
J.E. Hess
Keyword(s):  
Pedigree Reconstruction ◽  
Spawning Ground ◽  
Pacific Lamprey ◽  
Entosphenus Tridentatus ◽  
Mature Fish ◽  
Survey Methodologies ◽  
Sexually Mature ◽  
Substantial Effort

Redd surveys are a commonly used technique for indexing the abundance of sexually mature fish in streams; however, substantial effort is often required to link redd counts to actual spawner abundance. In this study, we describe how genetic pedigree reconstruction can be used to estimate effective spawner abundance in a stream reach, using Pacific lamprey (Entosphenus tridentatus) as an example. Lamprey embryos were sampled from redds within a 2.5 km reach of the Luckiamute River, Oregon, USA. Embryos were found in only 20 of the 48 redds sampled (suggesting 58% false redds); however, multiple sets of parents were detected in 44% of the true redds. Estimates from pedigree reconstruction suggested that there were 0.48 (95% CI: 0.29–0.88) effective spawners per redd and revealed that individual lamprey contributed gametes to a minimum of between one and six redds, and in one case, spawned in patches that were separated by over 800 m. Our findings demonstrate the utility of pedigree reconstruction techniques for both inferring spawning-ground behaviors and providing useful information for refining lamprey redd survey methodologies.

Pacific lamprey (Entosphenus tridentatus) ammocoetes exposed to contaminated Portland Harbor sediments: Method development and effects on survival, growth, and behavior

2016 ◽  
Vol 35 (8) ◽  
pp. 2092-2102 ◽  
Author(s):  
Julia R. Unrein ◽  
Jeffrey M. Morris ◽  
Rob S. Chitwood ◽  
Joshua Lipton ◽  
Jennifer Peers ◽  
...  
Keyword(s):  
Method Development ◽  
Pacific Lamprey ◽  
Entosphenus Tridentatus ◽  
And Behavior ◽  
Harbor Sediments

Pre-spawning migration of adult Pacific lamprey, Entosphenus tridentatus, in the Willamette River, Oregon, U.S.A.

2011 ◽  
Vol 93 (2) ◽  
pp. 245-254 ◽  
Author(s):  
Benjamin J. Clemens ◽  
Matthew G. Mesa ◽  
Robert J. Magie ◽  
Douglas A. Young ◽  
Carl B. Schreck
Keyword(s):  
Spawning Migration ◽  
Pacific Lamprey ◽  
Willamette River ◽  
Entosphenus Tridentatus

scholarly journals A Noninvasive Tool to Assess the Distribution of Pacific Lamprey (Entosphenus tridentatus) in the Columbia River Basin

PLoS ONE ◽  
2017 ◽  
Vol 12 (1) ◽  
pp. e0169334 ◽  
Author(s):  
Kellie J. Carim ◽  
J. Caleb Dysthe ◽  
Michael K. Young ◽  
Kevin S. McKelvey ◽  
Michael K. Schwartz
Keyword(s):  
River Basin ◽  
Columbia River ◽  
Columbia River Basin ◽  
Pacific Lamprey ◽  
Entosphenus Tridentatus
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