Inheritance and allelic relationships of genes governing resistance to the whitebacked planthopper, Sogatella furcifera (Hovarth), in some rice varieties

Date

12-1979

Abstract

The mode of inheritance of resistance to the whitebacked plant-hopper, Sogatella furcifera (Horvath) and the allelic relationships of the genes for resistance in 21 rice varities were studied. Test for resistance was done under greenhouse conditions utilizing the bulk seedling test and using the second and third instar nymphs of the planthopper.

The study of F1, F2 and F3 generations of the crosses of the 21 resistant varieties with susceptible variety Taichung Native 1 (TN1) revealed that a single dominant gene governs resistance in Mushkan 41, Santhi, Siahnakidar 195, SM2-34, Tirisurkh 251, Zirijowaian 245,18,24A,39,76S,78,180,213B,267,293,CI 6037-4,NP 97,S39 JKW and Bansphul. In varieties 65 and 274A, however, resistance is governed by one dominant and one recessive gene.

The allelic relationships of the genes for resistance to the earlier known genes Wbph 1 and Wbph 2 were determined. Reactions of the F2 and F3 progenies from crosses of test varieties with N 22 revealed that the dominant gene presnet in al the test varieties is the same as Wbph 1 gene reported in N 22. Further studies are required to determine the allelic relationships of the recessive genes found in varieties 65 and 274A.

Document Type

Dissertation

Degree

Doctor of Philosophy in Agronomy

College

Graduate School (GS)

Adviser/Committee Chair

Dr. T. M. Masajo

Committee Member

Dr. D. B. Lapis, Dr. E. A. Heinrichs, Dr. G. S. Khush

Language

English

LC Subject

Whitebacked planthopper, Rice--Diseases and pests

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 996 1979 A42 N35

Notes

Doctor of Philosophy (Agronomy)

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