MAINTENANCE OF ISOZYME POLYMORPHISMS IN NATURAL POPULATIONS OF AVENA BARBATA

MAINTENANCE OF ISOZYME POLYMORPHISMS IN NATURAL POPULATIONS OF AVENA BARBATA Received April 8, 1970 A large number of enzyme polymorphisms have been reported in both plant and animal species in the past few years. SHAW(1965),in his comprehensive review of electrophoretic variation i enzymes in diploid organisms, concluded n that “. . . it would seem thiat enzymes which vary are the rule rather than the exception.” A recent survey of enzyme polymorphisms in natural populations of Avena fatua (L.) and A . barbata (Brot.) in central California provides additional support for this contention and indicates that populations of these heavily inbreeding species often contain substantial stores of isoenzymatic variability (MARSHALL and ALLARD 1970). These findings raise the question of the nature and magnitude of the forces responsible for maintaining the observed variation. In the present report, evidence is presented which indicates that heterozygote advantage of isozyme loci and/or their associated linkage blocks is a major factor in the maintenance of polymorphisms in A . bmhnta. MATERIALS A N D METHODS Two natural populations of A . barbata occurring in the San Francisco Bay region of central California were chosen for study. One of these populations, designated SRB, occupies a moist site near U.S. Highway 101 in Marin County http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Genetics Genetics Society of America

MAINTENANCE OF ISOZYME POLYMORPHISMS IN NATURAL POPULATIONS OF AVENA BARBATA

Genetics, Volume 66: 393 – Oct 1, 1970

Loading next page...
 
/lp/genetics-society-of-america/maintenance-of-isozyme-polymorphisms-in-natural-populations-of-avena-1ds1abcPe0
Publisher
Genetics Society of America
Copyright
Copyright © 1970 by the Genetics Society of America
ISSN
0016-6731
eISSN
1943-2631
Publisher site
See Article on Publisher Site

Abstract

Received April 8, 1970 A large number of enzyme polymorphisms have been reported in both plant and animal species in the past few years. SHAW(1965),in his comprehensive review of electrophoretic variation i enzymes in diploid organisms, concluded n that “. . . it would seem thiat enzymes which vary are the rule rather than the exception.” A recent survey of enzyme polymorphisms in natural populations of Avena fatua (L.) and A . barbata (Brot.) in central California provides additional support for this contention and indicates that populations of these heavily inbreeding species often contain substantial stores of isoenzymatic variability (MARSHALL and ALLARD 1970). These findings raise the question of the nature and magnitude of the forces responsible for maintaining the observed variation. In the present report, evidence is presented which indicates that heterozygote advantage of isozyme loci and/or their associated linkage blocks is a major factor in the maintenance of polymorphisms in A . bmhnta. MATERIALS A N D METHODS Two natural populations of A . barbata occurring in the San Francisco Bay region of central California were chosen for study. One of these populations, designated SRB, occupies a moist site near U.S. Highway 101 in Marin County

Journal

GeneticsGenetics Society of America

Published: Oct 1, 1970

There are no references for this article.

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create folders to
organize your research

Export folders, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off