Genetics and breeding for chilli veinal mottle and cucumber mosaic virus resistances in hot pepper

Chew B.H., . and Ong C.A., . (1990) Genetics and breeding for chilli veinal mottle and cucumber mosaic virus resistances in hot pepper. [Proceedings Paper]

Aphid borne viruses have become the most important limiting factor affecting the production of chillies in this country. Yield reduction of up to 60 percent has been reported. Chilli veinal mottle virus CVMV was first reported by Ong 1979 who found it serologically different from pepper veinal mottle virus PVMV. Screening by sap inoculation for resistance sources from our germplasm pools of 344 accessions has resulted in the identification of 30 CVMV resistant/tolerant genotypes. Many of them are of exotic origin. Genetic analysis on crosses involving two CVMV resistant genotypes one local cili padi and the other a Mexican genotype Serrano Huasteco indicates a pair of recessive genes confer resistance to CVMV. Preliminary studies show that different genetic loci were involved in these two different resistant genotypes. These two resistant genes have been successfully incorporated separately into our susceptible cultivar. The F9 resistant breeding lines are now being screened for good agronomic characters. Preliminary screening for CMV resistance has identified 13 genotypes possessing high degree of resistance. They are all introduced materials. There are indications that strain differences exist among our local isolates. To date a total of seven genotypes are found to possess resistances to both CVMV and CMV. However further confirmation of the resistances of these genotypes need to be carried out. CVMV and CMV are prevalent in the field and mixed infection of the viruses are also commonly found it is deemed necessary that the final released cultivars should possess resistances to both viruses. Research is now geared towards incorporating the resistances of CMV to the F9 CVMV resistant breeding lines

Full text available from:

Abstract

Aphid borne viruses have become the most important limiting factor affecting the production of chillies in this country. Yield reduction of up to 60 percent has been reported. Chilli veinal mottle virus CVMV was first reported by Ong 1979 who found it serologically different from pepper veinal mottle virus PVMV. Screening by sap inoculation for resistance sources from our germplasm pools of 344 accessions has resulted in the identification of 30 CVMV resistant/tolerant genotypes. Many of them are of exotic origin. Genetic analysis on crosses involving two CVMV resistant genotypes one local cili padi and the other a Mexican genotype Serrano Huasteco indicates a pair of recessive genes confer resistance to CVMV. Preliminary studies show that different genetic loci were involved in these two different resistant genotypes. These two resistant genes have been successfully incorporated separately into our susceptible cultivar. The F9 resistant breeding lines are now being screened for good agronomic characters. Preliminary screening for CMV resistance has identified 13 genotypes possessing high degree of resistance. They are all introduced materials. There are indications that strain differences exist among our local isolates. To date a total of seven genotypes are found to possess resistances to both CVMV and CMV. However further confirmation of the resistances of these genotypes need to be carried out. CVMV and CMV are prevalent in the field and mixed infection of the viruses are also commonly found it is deemed necessary that the final released cultivars should possess resistances to both viruses. Research is now geared towards incorporating the resistances of CMV to the F9 CVMV resistant breeding lines

[error in script]

Item Type:	Proceedings Paper
Additional Information:	Summary En
AGROVOC Term:	PIPER NIGRUM
AGROVOC Term:	RESISTENCIA A LA ENFERMEDAD
AGROVOC Term:	VIRUS DEL MOSAICO DEL PEPINO
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:26
URI:	http://webagris.upm.edu.my/id/eprint/15302

Actions (login required)

View Item