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Varietal resistance in sorghum to spotted stem borer, Chilo partellus (Swinhoe)

Published online by Cambridge University Press:  19 September 2011

B. U. Singh  and
B. S. Rana
B. U. Singh
Affiliation:
All India Coordinated Sorghum Improvement Project, National Research Centre for Sorghum, Rajendranagar, Hyderabad 500 030 (AP), India
B. S. Rana
Affiliation:
All India Coordinated Sorghum Improvement Project, National Research Centre for Sorghum, Rajendranagar, Hyderabad 500 030 (AP), India
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Abstract

The spotted stem borer, Chilo partellus (Swinhoe) is an economically important pest in many sorghum growing areas of Asia and Africa. A chronological progress made in Indian and other programmes on natural and artificial screening techniques is reviewed. Numerous germpiasm accessions were evaluated and resistant sources identified and documented for various parameters of resistance such as foliar damage, “dead hearts” and stem tunnelling.

Studies on the mechanisms of resistance showed predominance of tolerance, variable degrees of antibiosis and antixenosis as only a factor for oviposition. The morphological characters and biochemical factors associated with resistance are discussed. The nature of resistance is polygenic and partially dominant over susceptibility. The inheritance patterns of resistance to foliar damage and/or “dead hearts”, and stem (stalk and peduncle) tunnelling damage are different and independent. Pedigree breeding with single and multiple crosses has been useful to transfer resistance in more economic background. Continuous screening for stem tunnelling over several generations improves the level of resistance. Recurrent selection was suggested alternatively with and without infestation for resistance and yield, respectively to increase the level of tolerance. The resistant sources utilized in developing commercially released high yielding varieties, hybrids and derivatives with low to moderate levels of resistance are listed. Efforts to develop cultivars with levels of resistance higher than presently grown cultivars and combining cross resistance to stem borers and shootfly are under way. Current progress has been reviewed and future strategies are suggested.

Résumé

Le rongeur de tige, Chilo partellus (Swinhoe) est un ravageur d'importance economique dans plusieurs regions d'Asie et Afrique, là oú le sorgho est cultivé. L'article fait de point, selon l'ordre chronologique, sur les progres récapitulation dans de Indé et divérse programes due en natural et en artificielles d'élevage techniques de criblage. Nombreux gérmplasm entree ont evaluaté, nombre sources et stabilité de résistance sont identifie due quant au dégâts des feuilles, “dead hearts” et un creusement de tiges est documenté.

Etude sur la mécanismes de résistance deplete predominance du tolerance, variable degree due antibiose et factéur pour la oviposition du antixenosis. Les traits morphologique et biochimique factéurs associate avéc la résistance est discutés. La nature de résistance deplcte polygenic et résistance etait dominante vis á vis la susceptibilite. La patterns de résistance quant au dégâts de feuilles, “dead hearts” et un creusement (stalk et peduncle) des tiges sont differéncé et indépendament hérités. Pedigré systèmé du séléction in singulier et multiple aux crosses est suggère. Une séléction continue pour le creusement des tiges pendant plusiers generations peut améliorer la resistance. Une séléction frequente est suggéré pour améliorer le nivéau de résistance ou tolérance au tongeur de tige ainsi que la récolte du sorgo. Les sources de résistance des varietés, hybridés et leurs dérivées developpées ont donné un rendement economique très elèvé. Des efforts sont entrepris pour developper des cultivars ayant un niveau de resistance plus elèvé que celui de cultivars qu'on utilise actuellement. Plusieurs autres varieté a haut réndement avéc nivéaux elevés de résistance sont aux stadés avances d'essai et combining de nouvelles sources de résistance multiples aux rongeurs de tiges et mouche des pousses est en cours. Le progré dans le revue et futuré stratégie du suggéré.

Keywords

AntibiosisantixenosisbreedingChilo partelluscross resistancegeneticsinheritancemechanisms of resistancenonpreferencerecovery resistancestem borerscreening techniquessorghumsourcesstabilitytolerancevarietal resistanceAntibioseantixénosséléctionChilo partelluscross résistancegénétiqueheritabilitémécanismes de résistancenonpreferencerecovery résistancerongeur de tigetéchniques de criblagesorgosourcésl'stabilitétolérancevarieté résistance
Type
Mini Review Article
Information
International Journal of Tropical Insect Science , Volume 10 , Issue 1 , February 1989 , pp. 3 - 27
Copyright
Copyright © ICIPE 1989

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