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Screening methods and further sources of resistance to peanut rust

OAR@ICRISAT

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Relation http://oar.icrisat.org/1125/
http://dx.doi.org/10.3146/i0095-3679-7-1-3
 
Title Screening methods and further sources of resistance to peanut rust
 
Creator Subrahmanyam, P
Gibbons, R W
Nigam, S N
Rao, V R
 
Subject Groundnut
 
Description creened for resistance to rust at ICRISAT, India. Preliminary
field screening was done during the 1977 rainy
season when a natural epidemic of rust was in progress.
The cultivars or lines which were rated between 2 and 5
on a Spoint scale during this screening were further
tested during the 1977/78 dry season employing an infector
row system of susceptible cultivars and spreader
plants systematically interplanted with the test material.
High relative humidity was maintained in the field by
operating an overhead sprinkler irrigation system. Percentage
leaf area damaged on the test material was
estimated at 10 day intervals from approximately 90 days
after their emergence until harvest. Each entry was also
assessed on a scale proposed by Mazzani and Hinojosa.
Two land races, NC.Ac. 17090 and EC. 76446 (292) were
more resistant than either PI. 259747 or PI. 298115
which were reported resistant by other workers. In addition,
NC.Ac. 17030, NC.Ac. 17132, NC.Ac. 17129, NC.
Ac. 17135 and NC.Ac. 17124 were moderately resistant.
Four cultivars or lines with different levels of resistance
in the field were tested in the greenhouse at three
different stages in development. The results indicated
that resistance increased as the plants aged.
 
Publisher American Peanut Research and Education Society
 
Date 1980
 
Type Article
PeerReviewed
 
Format application/pdf
application/pdf
 
Language en
en
 
Rights —
—
 
Identifier http://oar.icrisat.org/1125/1/SNNigam1980.pdf
http://oar.icrisat.org/1125/4/Screening_methods_1978.pdf
Subrahmanyam, P and Gibbons, R W and Nigam, S N and Rao, V R (1980) Screening methods and further sources of resistance to peanut rust. Peanut Science, 7 (1). pp. 10-12.