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Breeding Sorghum with Resistance to Striga asiatica (L) Kuntze at ICRISAT Center

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Relation http://oar.icrisat.org/5139/
 
Title Breeding Sorghum with Resistance to Striga asiatica (L) Kuntze at ICRISAT Center
 
Creator Rao, M J V
Chidley, V L
Ramaiah, K V
House, L R
 
Subject Sorghum
 
Description Breeding for Striga resistance at ICRISAT Center, near Hyderabad, India, has the twin
objectives of identifying sorghum source lines resistant to Striga asiatica and transfering the
resistance to agronomically elite lines; 14 000 sorghum germplasm lines have been
screened in the laboratory for their stimulant production and 640 low-stimulant lines have
been identified. Studies on the genetics of stimulant production have indicated a
preponderance of additive over nonadditive genetic variance. Selection for field resistance
among the derivatives from Striga-resistant source lines x adapted crosses resulted in a
higher proportion of field resistants in the low-stimulant than in the high-stimulant derivatives.
In multilocation testing of the source lines, field reaction indicated that the best available low
susceptible lines are N-13, 555, IS-4202, IS-7471, and IS-9985. The technique of growing
test plants of the host in shallow seed pans in a soil medium has been found useful in
differentiating resistant from susceptible host plants. An improved, three-stage system of
screening for field resistance to Striga is described. Initial studies on Striga collected from
five locations in India and four sorghum varieties indicated significant strain x variety
interactions and SRN-4882B gave differential reaction. Intensive studies on host-parasite
relationships, environmental interactions influencing Striga, screening methodology, guidelines
to manage Striga sick fields, and surveys to understand species and race complexes
have been projected as some of the priority areas of Striga research.
 
Date 1983
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/5139/1/0118.pdf
Rao, M J V and Chidley, V L and Ramaiah, K V and House, L R (1983) Breeding Sorghum with Resistance to Striga asiatica (L) Kuntze at ICRISAT Center. In: Proceedings of the Second International Workshop on Striga, 5-8 October 1981, ICRISAT Patancheru, Andhra Padesh, India.