Differential response of rice varieties to the brown planthopper in international screening tests

Seshu, D.V. and Kauffmann, H.E. (1980) Differential response of rice varieties to the brown planthopper in international screening tests. Other. International Rice Research Institute, Los Banos, Laguna Philippines.

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Abstract

The results from International Rice Brown Planthopper Nursery screening in seve,7al Asian countries over a 5-year period (1075-79) provide significant information on biotype variatio,. in brown planthopper and sources of genetic reistance to the different biotypes in different countries. A major distinction between the insect populations in South Asia (Bangladesh, India, and Sri Lanka) and those in the rest of Asia is evident. Biotype differences of lower order within the common insect populations in East and Southeast Asian countries are also evident. Differential reactions within areas in India are also noted. Within each of the group of varieties of Bph I, Bph 2, Bph 3, and Bph 4 genes identified at IRRI, certain differences are evident from the reactions in other countries and, based on those, a set of differential varieties has been proposed. PTB33, Suduru Samba, and Sinna Sivappu were resistant at almost all test sites. Several improved breeding lines derived from PTB33 were promising in all the regions of Asia and Solomon Islands. Genes conveying resistance to brown planthopper in PTB33 seem to be different in South Asia from those in the rest of Asia as evident from the differential reactions of the semidwarf selections derived from that variety. International collaboration in breeding and genetic studies has been emphasized for an effective follow-up on the extremely useful findings from the International Rice Brown Planthopper Nursery screening tests

Item Type:	Monograph (Other)
Author Affiliation:	International Rice Research Institute, Los Banos, Laguna Philippines
Subjects:	Plant Protection > Pests Crop Improvement > Genetics/Genomics Crop Improvement > Plant Breeding
Divisions:	Other Crops
Depositing User:	Ms K Syamalamba
Date Deposited:	31 Oct 2012 08:32
Last Modified:	31 Oct 2012 08:32
URI:	http://eprints.icrisat.ac.in/id/eprint/8603

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