Genes and parishes effect diseases in plants
UNIVERSITY PARK - A
new concept of breeding
plants for long-lasting
disease resistance _ by
returning both plants and
their parasites to more
“natural” states is a
possiblity, says a research
plant pathologist at The
CHRIS TOPPED THE LIST
29 H2Bll Le-Dei Elevation CHRIS 1647459 GP-81 IB
USDA, 7-78 Rpt.63%
40D. 34H. av. 19.065 M
PD +sl6l +2.156M
H-FA, Vol. 2,1978 Rpt. 54%
16 Class, dtrs. av. 81.4 AA 56% ABA
PDT +0.98 TPI +49o*
* +490 TPI is the highest recognized in the breed.
CHRIS is sired by Elevation from a VG Bootmaker dam with over
25.000 M.
CHRIS is the number one bull of the breed
Number one for milk
Number one for TPI +490 (Holstein World 9-78)
Number four for PD Dollars - +l6ls (Hoards Dairyman 9-78)
Plus nearly one point in type + 0.98 (HFA, Vol. 2,1978)
Maternal Grand-dam is EX-912E GMD
HFA codings are #1 for RU, FU, if, HL, & FT. #2 for RP, BK, & HD.
Enroll your herd in the Genetic Mating Service
Program (GMS) to best utilize CHRIS and other fine
ABS sires.
Bangor, PA
Ephrata, PA
Gap, PA
Kbltwood, PA
Columbia, PA
Newburg, PA
Port Murray, NJ
Reading, PA
Richland, PA
Thomasville, PA
West Grove, PA
Port Deposit, MO
DBS
Pennsylvania
University.
“Historically, natural
populations of plants and
* their parasites have learned
to live together over time,”
declared Dr. Richard R.
' Nelson. “Plants and
narasites attained their
3.34%
-.25%
ErioHeinsohn
Darvin Yoder
Lynn Gardner
Paul Herr _
James Charles
Jerry Babonis
Robert Kayhart
Robert Greider
Paul Martin
Ira Boyer
Maurice Stump 215-869-9187
R. James Benjamin ill 301-378-3540
State
ability to co-exist together
by each accumulating a
number of genes for then
own defense. This developed
throughout a long co-
Their mutual
safety and survival was due
to numbers of genes,” he
explained.
6378 F
+ 378 F
(USDA 7-78)
+2156
215-588-4704
717-733-0966
717-656-6509
717-284-4592
717-898-8694
717-423-6451
201-689-2605
215-378-1212
717-866-4228
717-225-3758
Dr. Nelson is Evan Pugh
Professor of Plant Pathology
at Penn State, one of only 11
faculty members currently
carrying this Evan Pugh
designation for unusually
distinguished achievements
in research andteaching.
Attempts by modem man
to control most plant
diseases with single
resistance genes have taken
many cultivated plant hosts
and their parasites out of
balance at a catastrophic
cost, he observed. As
examples he listed the potato
late blight responsible fer
tile Irish famine of 1840, and,
in more recent years,
epidemics of stem rust of
wheat.
“Developing plant
varieties with single gene
resistance, as done widely
today,, is a feast or famine
approach,” he contended.
ÜBS
At the heart of the new
system being advocated by
Nelson and other plant
pathologists is a concept
sometimes called
generalized resistance. With
such resistance, a disease
increases at a slow rate -
producing less losses than
otherwise by the end of the
growing season.
“This generalized
resistance is what plants
possess in the ‘natural’
states,” he affirmed.
“Plants evolved to that kind
of resistance without man’s
intervention by ac
cumulating genes for both
attack and defense. Most
plants can endure some level
of disease without a major
yield loss,” he added.
Dr. Nelson and Dr. David
R. MacKenzie and then
associates are combining a
number of resistance genes
to determine if this approach
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can manage diseases to
economically acceptable
levels and remain effective
over a long period of time.
The research is sponsored in
part by funds from the
Rockefeller Foundation. The
Penn State scientists believe
that use of several genes
together should return
plants and parasites to
balance and would be
evident in slow build-up of
disease.
The research project being
conducted by scientists with
the Agricultural Experiment
Station at Penn State is to
help meet the increased need
for world food production.
Plan Ahead
Plan ahead for your next
party Prepare glasses for
the cold drinks you’re plan
ning on serving Buy a
supply of 10-ounce plastic
glasses Fill with almost an
inch of water and freeze un
til solid Once frozen, stack
the glasses in your freezer to
save space When your
guests arrive, just pour
beverages into the frosty
glasses using ice cubes if
desired
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