GENETIC ORGANIZATION OF A REPEATED DNA-SEQUENCE FAMILY IN THE RICE BLAST FUNGUS

被引:52
|
作者
ROMAO, J [1 ]
HAMER, JE [1 ]
机构
[1] PURDUE UNIV,DEPT BIOL SCI,W LAFAYETTE,IN 47907
关键词
LINKAGE ANALYSIS; RICE BLAST DISEASE; PYRICULARIA; FUNGAL PLANT PATHOGENS;
D O I
10.1073/pnas.89.12.5316
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The fungal rice pathogen Magnaporthe grisea contains repetitive DNA sequences called MGR. We have used a DNA probe, MGR586, derived from these sequences and crosses between rice-pathogenic and non-rice-pathogenic laboratory strains of M. grisea to rapidly map genes in this organism. The rice-pathogenic strain contained 57 EcoRI restriction fragments that hybridize to the MGR586 probe; the other rive non-rice-pathogenic parent strains contained a single MGR586 sequence. Genetic analysis of MGR segregation detected eight linkage groups and allowed the mapping of three pigmentation genes (Alb1, Rsy1, and Buf1), the mating type locus (Matl), the nucleolar organizer (Rdn1), the Smo1 gene, and two restriction fragment length polymorphisms linked to Smo1. Our results indicate that the MGR586 loci are randomly distributed about the M. grisea genome and permit the construction of a well-marked linkage map useful for future studies on genome organization and genetic analysis in M. grisea.
引用
收藏
页码:5316 / 5320
页数:5
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