Genotypic response of faba bean to water stress |
| |
| Authors: | L Ricciardi GB Polignano C De Giovanni |
| |
| Institution: | (1) Department of Crop Science, Sokoine, University of Agriculture, P.O. Box 3005, Morogoro, Tanzania;(2) Division of Plant Breeding, Genetics and Biochemisty, International Rice Research Institute, MCPO Box 3127, 1271 Makati City, Philippines |
| |
| Abstract: | Forty resistant rice cultivars were studied for theinheritance of resistance to bacterial blight usingPhilippine races of Xanthomonas oryzae pv.oryzae (Xoo). Results showed that all thevarieties have at least two recessive genes forresistance. One of these genes governs resistance torace 1 (PXO61) while the other gene confers resistanceto race 6 (PXO99). In addition to the recessivegenes, nine of the varieties possess another dominantgene which also confers resistance to race 1.Allelism tests revealed that the recessive genesgoverning resistance to race 1 in 39 varieties areallelic to xa5 while the dominant genes in thenine varieties are allelic to Xa4. Therecessive gene conferring resistance to race 1 incultivar Sada Diga is inherited independently of xa5. Similarly, the recessive genes governingresistance to race 6 in all the varieties arenon-allelic to xa13. The allelic relationshipsof these genes with xa-24(t), a new recessivegene identified in cultivar DV86 which conveysresistance to race 6 are now being investigated. |
| |
| Keywords: | allelic relationship bacterial blight races dominant gene recessive gene rice yield losses |
| 本文献已被 SpringerLink 等数据库收录！ |
|
