Experimental Evolution of Resistance in Brassica rapa: Correlated Response of Tolerance in Lines Selected for Glucosinolate Content

Evolution ◽  
1998 ◽  
Vol 52 (3) ◽  
pp. 703 ◽  
Author(s):  
Kirk A. Stowe
Keyword(s):  
Brassica Rapa ◽  
Experimental Evolution ◽  
Glucosinolate Content ◽  
Correlated Response ◽  
Evolution Of Resistance

scholarly journals The costs of evolving resistance in heterogeneous parasite environments

2011 ◽  
Vol 279 (1735) ◽  
pp. 1896-1903 ◽  
Author(s):  
Britt Koskella ◽  
Derek M. Lin ◽  
Angus Buckling ◽  
John N. Thompson
Keyword(s):  
Host Resistance ◽  
Experimental Evolution ◽  
Specific Resistance ◽  
Control Strategies ◽  
Resistance Mechanism ◽  
Fitness Costs ◽  
Bacterial Host ◽  
Strong Constraint ◽  
Combined Control ◽  
Evolution Of Resistance

The evolution of host resistance to parasites, shaped by associated fitness costs, is crucial for epidemiology and maintenance of genetic diversity. Selection imposed by multiple parasites could be a particularly strong constraint, as hosts either accumulate costs of multiple specific resistances or evolve a more costly general resistance mechanism. We used experimental evolution to test how parasite heterogeneity influences the evolution of host resistance. We show that bacterial host populations evolved specific resistance to local bacteriophage parasites, regardless of whether they were in single or multiple-phage environments, and that hosts evolving with multiple phages were no more resistant to novel phages than those evolving with single phages. However, hosts from multiple-phage environments paid a higher cost, in terms of population growth in the absence of phage, for their evolved specific resistances than those from single-phage environments. Given that in nature host populations face selection pressures from multiple parasite strains and species, our results suggest that costs may be even more critical in shaping the evolution of resistance than previously thought. Furthermore, our results highlight that a better understanding of resistance costs under combined control strategies could lead to a more ‘evolution-resistant’ treatment of disease.

Eldorado summer turnip rape

1993 ◽  
Vol 73 (1) ◽  
pp. 185-186
Author(s):  
D. F. Degenhardt ◽  
G. R. Stringam ◽  
Z. P. Kondra
Keyword(s):  
Brassica Rapa ◽  
Seed Yield ◽  
Oil Content ◽  
Seed Oil ◽  
Glucosinolate Content ◽  
Western Canada ◽  
Seed Oil Content ◽  
Turnip Rape ◽  
Cultivar Description ◽  
Canola Quality

Eldorado summer rape (Brassica rapa L.) is a canola-quality cultivar with a seed yield similar to that of Tobin. The seed oil content of Eldorado is significantly higher and its meal glucosinolate content is significantly lower than Tobin. Eldorado is well adapted to the B. rapa-growing areas of western Canada. Keywords: Turnip rape (summer), cultivar description

Experimental evolution of resistance against a competing fungus in Drosophila melanogaster

Oecologia ◽  
2009 ◽  
Vol 161 (4) ◽  
pp. 781-790 ◽  
Author(s):  
Susanne Wölfle ◽  
Monika Trienens ◽  
Marko Rohlfs
Keyword(s):  
Drosophila Melanogaster ◽  
Experimental Evolution ◽  
Evolution Of Resistance

Effects of Phytohormones and Jasmonic Acid on Glucosinolate Content in Hairy Root Cultures of Sinapis alba and Brassica rapa

2012 ◽  
Vol 169 (2) ◽  
pp. 624-635 ◽  
Author(s):  
Anja Kastell ◽  
Iryna Smetanska ◽  
Christian Ulrichs ◽  
Zhenzhen Cai ◽  
Inga Mewis
Keyword(s):  
Jasmonic Acid ◽  
Brassica Rapa ◽  
Hairy Root ◽  
Sinapis Alba ◽  
Glucosinolate Content ◽  
Hairy Root Cultures ◽  
Root Cultures

scholarly journals Experimental Evolution of Resistance to Artemisinin Combination Therapy Results in Amplification of the mdr1 Gene in a Rodent Malaria Parasite

PLoS ONE ◽  
2010 ◽  
Vol 5 (7) ◽  
pp. e11593 ◽  
Author(s):  
Louise A. Rodrigues ◽  
Gisela Henriques ◽  
Sofia T. Borges ◽  
Paul Hunt ◽  
Cecília P. Sanchez ◽  
...  
Keyword(s):  
Combination Therapy ◽  
Experimental Evolution ◽  
Malaria Parasite ◽  
Artemisinin Combination Therapy ◽  
Mdr1 Gene ◽  
Rodent Malaria Parasite ◽  
Rodent Malaria ◽  
Evolution Of Resistance

scholarly journals Adaptation to temporally fluctuating environments by the evolution of maternal effects

2015 ◽  
Author(s):  
Snigdhadip Dey ◽  
Steve Proulx ◽  
Henrique Teotonio
Keyword(s):  
Maternal Effects ◽  
Experimental Evolution ◽  
Reproductive Strategies ◽  
Correlated Response ◽  
Bet Hedging ◽  
Offspring Performance ◽  
Trade Offs ◽  
Wide Range ◽  
Fluctuating Environments ◽  
Selection For

Most organisms live in ever-challenging temporally fluctuating environments. Theory suggests that the evolution of anticipatory (or deterministic) maternal effects underlies adaptation to environments that regularly fluctuate every other generation because of selection for increased offspring performance. Evolution of maternal bet-hedging reproductive strategies that randomize offspring phenotypes is in turn expected to underlie adaptation to irregularly fluctuating environments. Although maternal effects are ubiquitous their adaptive significance is unknown since they can easily evolve as a correlated response to selection for increased maternal performance. Using the nematode Caenorhabditis elegans, we show the experimental evolution of maternal provisioning of offspring with glycogen, in populations facing a novel anoxia hatching environment every other generation. As expected with the evolution of deterministic maternal effects, improved embryo hatching survival under anoxia evolved at the expense of fecundity and glycogen provisioning when mothers experienced anoxia early in life. Unexpectedly, populations facing an irregularly fluctuating anoxia hatching environment failed to evolve maternal bet-hedging reproductive strategies. Instead, adaptation in these populations should have occurred through the evolution of balancing trade-offs over multiple generations, since they evolved reduced fitness over successive generations in anoxia but did not go extinct during experimental evolution. Mathematical modelling confirms our conclusion that adaptation to a wide range of patterns of environmental fluctuations hinges on the existence of deterministic maternal effects, and that they are generally much more likely to contribute to adaptation than maternal bet-hedging reproductive strategies.

Genetic Study and QTL Mapping of Seed Glucosinolate Content in Brassica rapa L.

Crop Science ◽  
2014 ◽  
Vol 54 (2) ◽  
pp. 537-543 ◽  
Author(s):  
Habibur Rahman ◽  
Berisso Kebede ◽  
Céline Zimmerli ◽  
Rong-Cai Yang
Keyword(s):  
Qtl Mapping ◽  
Brassica Rapa ◽  
Genetic Study ◽  
Glucosinolate Content

GENETIC VARIATION IN GLUCOSINOLATE CONTENT WITHIN BRASSICA RAPA VEGETABLES

2012 ◽  
pp. 129-140
Author(s):  
Hongju He ◽  
Lou Ping ◽  
G. Bonnema ◽  
M. Dekker ◽  
R. Verkerk
Keyword(s):  
Genetic Variation ◽  
Brassica Rapa ◽  
Glucosinolate Content

scholarly journals Epigenetic mechanisms mediate the experimental evolution of resistance against parasitic fungi in the greater wax moth Galleria mellonella

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Krishnendu Mukherjee ◽  
Ivan Dubovskiy ◽  
Ekaterina Grizanova ◽  
Rüdiger Lehmann ◽  
Andreas Vilcinskas
Keyword(s):  
Experimental Evolution ◽  
Galleria Mellonella ◽  
Epigenetic Mechanisms ◽  
Parasitic Fungi ◽  
Greater Wax Moth ◽  
Evolution Of Resistance ◽  
Wax Moth
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