Host movement and the genetic structure of populations of parasitic nematodes.

نویسندگان

  • M S Blouin
  • C A Yowell
  • C H Courtney
  • J B Dame
چکیده

Mitochondrial DNA (mtDNA) sequence data were used to compare the population genetic structures of five species of parasitic nematodes from three different hosts: Ostertagia ostertagi and Haemonchus placei from cattle, H. contortus and Teladorsagia circumcincta from sheep, and Mazamastrongylus odocoilei from white-tailed deer. The parasites of sheep and cattle showed a pattern consistent with high gene flow among populations. The parasite of deer showed a pattern of substantial population subdivision and isolation by distance. It appears that host movement is an important determinant of population genetic structure in these nematodes. High gene flow in the parasites of livestock also indicates great opportunity for the spread of rare alleles that confer resistance to anthelmintic drugs. All species, including the parasite of deer, had unusually high within-population diversities (averages of 0.019-0.027 substitutions per site between pairs of individuals from the same population). Large effective population sizes (Ne), perhaps in combination with rapid mtDNA evolution, appear to be the most likely explanation for these high within-population diversities.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Susceptibility Assessments of Tomato Genotypes to Root Knot Nematodes, Meloidogyne javanica

Root-knot nematodes, Meloidogyne spp., are one of the important plant parasitic nematodes of tomato in the world. The most suitable control method of plant parasitic nematodes is the use of resistance sources and tolerant cultivars. In the earlier studies, the results showed thatonly 2% (19 out of 537 varieties) were resistant and tolerant to the root knot nematodes. In the supplementary studie...

متن کامل

Population Genetic Structure of Yellow Seabream (Acanthopagrus latus) in North Costal of Persain Gulf

Abstract Yellowfin seabream (Acanthopagrus latus), an important economical species and popular market fish found in the coastal water of Persian Gulf. In this study, eight microsatellite loci were used, population structure and genetic diversity of this species was studied in six fishing area in the Persian Gulf. Alleles observed in different stations were between 7 to 12 with an average of  9...

متن کامل

Functional consequences of genetic diversity in Strongyloides ratti infections.

Parasitic nematodes show levels of genetic diversity comparable to other taxa, but the functional consequences of this are not understood. Thus, a large body of theoretical work highlights the potential consequences of parasite genetic diversity for the epidemiology of parasite infections and its possible implications for the evolution of host and parasite populations. However, few relevant emp...

متن کامل

Report of five species of plant parasitic nematodes associated with hawthorn forest trees in western Iran

Z, Bazgir E, Naghavi A (2020) Report of five species of plant parasitic nematodes associated with hawthorn forest trees in western Iran. Plant Pathology Science 9(1):16-30. DOI: 10.2982/PPS.9.1.16 Introduction: The Hoplolaimidae family is one of the largest and economically most important families of the order/ infraorder Tylenchida / Tylenchomorpha. The members of this family spread all over ...

متن کامل

Review on the role of host genetic factors in the susceptibility to SARS-CoV-2

Background: Severe acute respiratory system Cov-2 pandemic has affected the world populations for more than one year. Different incidence and severity of this viral disease among various age range and individuals with different background disease may indicate the pivotal role of host genetic factors in their prevalence and mortality rate. In this regards, present study was performed to review t...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • Genetics

دوره 141 3  شماره 

صفحات  -

تاریخ انتشار 1995