PMID: 9193948May 1, 1997Paper

Life-history variation among lines isolated from a laboratory population of Heligmosomoides polygyrus bakeri

International Journal for Parasitology
A ChehresaM E Scott

Abstract

The extent of variation in several life-history traits within a laboratory population of the parasitic nematode, Heligmosomoides polygyrus bakeri, was studied in 10 relatively inbred parasite lines isolated from a stock population and characterized in BALB/c mice after 4, 8 and 11 generations of isolation. As expected, within-line variation for most traits at generation 11 compared to generation 4 significantly decreased (P < 0.01). At each generation of characterization, variation was observed among lines for parasite establishment, rate of development in the host, rate of early egg production, per capita fecundity, short-term and long-term survival and profiles of egg production, rate of decline in egg production, life-long reproductive effort and in vitro egg hatchability. Measures of all traits, except establishment, were highly repeatable. The rate of development was higher at generation 8 compared to the stock (P < 0.0001), and regression analysis revealed that early egg production of lines increased over 11 generations of isolation (P = 0.003). These results, together with the observed decrease (P < 0.01) in total variation of most of the traits over all lines during the process of isolation, suggested an evolutionary re...Continue Reading

References

Dec 1, 1977·International Journal for Parasitology·C Dobson, M E Owen
Oct 22, 1986·Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character·A E Keymer, R W Hiorns
Feb 1, 1992·Trends in Ecology & Evolution·D Remick
Apr 1, 1992·Trends in Ecology & Evolution·D Reznick

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.