Abstract
The inheritance of specific virulence in Bremia lactucae was studied by hybridizing two isolates which differed in their virulence on host cultivars carrying the resistance factors R1, R2, R4, R6 and R11. Avirulence on R1, R2, R4 and R11 was dominant to virulence and the segregation conformed to that expected for alleles at single loci, although reactions on R4 were not always dearly defined. The loci conditioning avirulence on R2 and R11 were probably linked. It was difficult to classify the reactions of isolates on R6 and the ratios obtained could not readily be interpreted in Mendelian terms. Since no segregation was observed for reaction on R3, R5, R7, R8, R9 and R10 it was concluded that the genes determining virulence on these factors occurred at the same loci in both isolates, Sexual compatibility type (B1 and B2) segregated with a ratio of 1:1.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 177-186 |
| Number of pages | 10 |
| Journal | Plant Pathology |
| Volume | 32 |
| Issue number | 2 |
| DOIs | |
| State | Published - 1983 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Agronomy and Crop Science
- Genetics
- Plant Science
- Horticulture
Cite this
The inheritance of specific virulence in Bremia lactucae (downy mildew) to match resistance factors 1, 2, 4, 6 and 11 in Lactuca sativa (lettuce). / NORWOOD, JUDITH M.; Michelmore, Richard W; CRUTE, I. R.; INGRAM, D. S.
In: Plant Pathology, Vol. 32, No. 2, 1983, p. 177-186.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The inheritance of specific virulence in Bremia lactucae (downy mildew) to match resistance factors 1, 2, 4, 6 and 11 in Lactuca sativa (lettuce)
AU - NORWOOD, JUDITH M.
AU - Michelmore, Richard W
AU - CRUTE, I. R.
AU - INGRAM, D. S.
PY - 1983
Y1 - 1983
N2 - The inheritance of specific virulence in Bremia lactucae was studied by hybridizing two isolates which differed in their virulence on host cultivars carrying the resistance factors R1, R2, R4, R6 and R11. Avirulence on R1, R2, R4 and R11 was dominant to virulence and the segregation conformed to that expected for alleles at single loci, although reactions on R4 were not always dearly defined. The loci conditioning avirulence on R2 and R11 were probably linked. It was difficult to classify the reactions of isolates on R6 and the ratios obtained could not readily be interpreted in Mendelian terms. Since no segregation was observed for reaction on R3, R5, R7, R8, R9 and R10 it was concluded that the genes determining virulence on these factors occurred at the same loci in both isolates, Sexual compatibility type (B1 and B2) segregated with a ratio of 1:1.
AB - The inheritance of specific virulence in Bremia lactucae was studied by hybridizing two isolates which differed in their virulence on host cultivars carrying the resistance factors R1, R2, R4, R6 and R11. Avirulence on R1, R2, R4 and R11 was dominant to virulence and the segregation conformed to that expected for alleles at single loci, although reactions on R4 were not always dearly defined. The loci conditioning avirulence on R2 and R11 were probably linked. It was difficult to classify the reactions of isolates on R6 and the ratios obtained could not readily be interpreted in Mendelian terms. Since no segregation was observed for reaction on R3, R5, R7, R8, R9 and R10 it was concluded that the genes determining virulence on these factors occurred at the same loci in both isolates, Sexual compatibility type (B1 and B2) segregated with a ratio of 1:1.
UR - http://www.scopus.com/inward/record.url?scp=84981636310&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84981636310&partnerID=8YFLogxK
U2 - 10.1111/j.1365-3059.1983.tb01317.x
DO - 10.1111/j.1365-3059.1983.tb01317.x
M3 - Article
AN - SCOPUS:84981636310
VL - 32
SP - 177
EP - 186
JO - Plant Pathology
JF - Plant Pathology
SN - 0032-0862
IS - 2
ER -