ISSN:
1432-2242
Keywords:
Key words Rice
;
Bacterial blight
;
Resistance genes
;
Pyramiding
;
MAS
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract DNA marker-assisted selection was used to pyramid four bacterial blight resistance genes, Xa-4, xa-5, xa-13 and Xa-21. Breeding lines with two, three and four resistance genes were developed and tested for resistance to the bacterial blight pathogen (Xanthomonas oryzae pv. oryzae). The pyramid lines showed a wider spectrum and a higher level of resistance than lines with only a single gene. To speed up the gene pyramiding process and to facilitate future marker-aided selection, we developed PCR markers for the two recessive genes, xa-5 and xa-13, and used these to survey a range of rice germplasm. The results of the germplasm survey will be useful for the selection of parents in breeding programs aimed at transferring these bacterial blight resistance genes from one varietal background to another.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s001220050565
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