NDLI: Application of synteny across Poaceae to determine the map location of a sugarcane rust resistance gene

Content Provider	Springer Nature Link
Author	Asnaghi, C. Paulet, F. Kaye, C. Grivet, L. Deu, M. Glaszmann, J. C. D’Hont, A.
Copyright Year	2000
Abstract	A major rust resistance gene has been identified in a self-progeny of the sugarcane cultivar R570. Until now, this gene was known to be linked to a marker revealed by the sugarcane probe CDSR29 but unassigned to any linkage group of the current genetic map. We used synteny relationships between sugarcane and three other grasses in an attempt to saturate the region around this rust resistance gene. Comparison of sugarcane, sorghum, maize and rice genetic maps led to the identification of homoeologous chromosome segments at the extremity of sorghum linkage group D, rice linkage group 2, maize linkage group 4 and in the centromeric region of maize linkage group 5. One hundred and eighty-four heterologous probes were selected and tested for cross-hybridization with sugarcane DNA; 106 produced a good hybridization signal and were hybridized on 88 individuals of the R570 selfed progeny. Two hundred and seventeen single-dose markers were added to the R570 genetic map, of which 66% mapped to linkage group VII, together with the rust resistance gene. This gene has now been mapped to the end of a co-segregating group consisting of 19 RFLP markers. None of the mapped loci were located closer to the gene than CDSR29. The gene thus appears to reside at the edge of a ’’synteny cluster’’ used to describe the different grass genomes.
Starting Page	962
Ending Page	969
Page Count	8
File Format	PDF
ISSN	00405752
Journal	Theoretical and Applied Genetics
Volume Number	101
Issue Number	5
e-ISSN	14322242
Language	English
Publisher	Springer-Verlag
Publisher Date	2000-10-10
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Genetics Medicine Biotechnology Agronomy and Crop Science

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