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Key Message: Pl 17, a novel downy mildew resistance gene independent of known downy mildew resistance genes in sunflowers, was genetically mapped to linkage group 4 of the sunflower genome. Downy mildew (DM), caused by Plasmopara halstedii (Farl.). Berl. et de Toni, is one of the serious sunflower diseases in the world due to its high virulence and the variability of the pathogen. DM resistance in the USDA inbred line, HA 458, has been shown to be effective against all virulent races of P. halstedii currently identified in the USA. To determine the chromosomal location of this resistance, 186 F 2:3 families derived from a cross of HA 458 with HA 234 were phenotyped for their resistance to race 734 of P. halstedii. The segregation ratio of the population supported that the resistance was controlled by a single dominant gene, Pl 17. Simple sequence repeat (SSR) and single nucleotide polymorphism (SNP) primers were used to identify molecular markers linked to Pl 17. Bulked segregant analysis using 849 SSR markers located Pl 17 to linkage group (LG) 4, which is the first DM gene discovered in this linkage group. An F2 population of 186 individuals was screened with polymorphic SSR and SNP primers from LG4. Two flanking markers, SNP SFW04052 and SSR ORS963, delineated Pl 17 in an interval of 3.0 cM. The markers linked to Pl 17 were validated in a BC3 population. A search for the physical location of flanking markers in sunflower genome sequences revealed that the Pl 17 region had a recombination frequency of 0.59 Mb/cM, which was a fourfold higher recombination rate relative to the genomic average. This region can be considered amenable to molecular manipulation for further map-based cloning of Pl 17.

Titel:	Pl(17) is a novel gene independent of known downy mildew resistance genes in the cultivated sunflower (Helianthus annuus L.).
Autor/in / Beteiligte Person:	Qi, LL ; Long, YM ; Jan, CC ; Ma, GJ ; Gulya, TJ
Link:	Full Text Finder (Volltext)
Zeitschrift:	TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik, Jg. 128 (2015-04-01), Heft 4, S. 757-67
Veröffentlichung:	Berlin, New York, Springer, 2015
Medientyp:	academicJournal
ISSN:	1432-2242 (electronic)
DOI:	10.1007/s00122-015-2470-8
Schlagwort:	Genes, Dominant Genes, Plant Genetic Linkage Genetic Markers Genome, Plant Genotype Helianthus microbiology Microsatellite Repeats Phenotype Plant Diseases genetics Plant Diseases microbiology Polymorphism, Single Nucleotide Chromosome Mapping Disease Resistance genetics Helianthus genetics Peronospora
Sonstiges:	Nachgewiesen in: MEDLINE Sprachen: English Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. Language: English [Theor Appl Genet] 2015 Apr; Vol. 128 (4), pp. 757-67. <i>Date of Electronic Publication: </i>2015 Feb 12. MeSH Terms: Chromosome Mapping* ; Peronospora* ; Disease Resistance / genetics ; Helianthus / genetics ; Genes, Dominant ; Genes, Plant ; Genetic Linkage ; Genetic Markers ; Genome, Plant ; Genotype ; Helianthus / microbiology ; Microsatellite Repeats ; Phenotype ; Plant Diseases / genetics ; Plant Diseases / microbiology ; Polymorphism, Single Nucleotide References: Theor Appl Genet. 2015 Mar;128(3):477-88. (PMID: 25575836) ; Can J Microbiol. 2003 Aug;49(8):492-502. (PMID: 14608384) ; Proc Natl Acad Sci U S A. 1991 Nov 1;88(21):9828-32. (PMID: 1682921) ; Genome Res. 1998 Nov;8(11):1113-30. (PMID: 9847076) ; Theor Appl Genet. 1995 Oct;91(5):733-7. (PMID: 24169908) ; Genetics. 1992 Dec;132(4):1141-60. (PMID: 1360934) ; Theor Appl Genet. 2003 Feb;106(4):599-606. (PMID: 12595987) ; Theor Appl Genet. 2012 Jun;125(1):121-31. (PMID: 22350177) ; Genome. 2001 Apr;44(2):205-12. (PMID: 11341730) ; Science. 1995 Oct 20;270(5235):480-3. (PMID: 7570002) ; Genetics. 2003 Jun;164(2):655-64. (PMID: 12807786) ; Theor Appl Genet. 2011 Jul;123(2):351-8. (PMID: 21479933) ; Plant Mol Biol. 2000 Jan;42(1):195-204. (PMID: 10688137) ; Theor Appl Genet. 2004 Sep;109(5):1083-6. (PMID: 15221147) ; Theor Appl Genet. 2010 Nov;121(8):1633-44. (PMID: 20700574) ; Plant Cell. 1998 Nov;10(11):1817-32. (PMID: 9811791) ; Theor Appl Genet. 2003 May;106(8):1438-46. (PMID: 12750787) ; Theor Appl Genet. 2004 Jun;109(1):176-85. (PMID: 15007505) ; Plant Cell. 2002 Aug;14(8):1903-17. (PMID: 12172030) ; Genetics. 2000 Feb;154(2):823-35. (PMID: 10655233) ; Theor Appl Genet. 2002 Mar;104(4):592-600. (PMID: 12582663) ; G3 (Bethesda). 2012 Jul;2(7):721-9. (PMID: 22870395) ; Theor Appl Genet. 2012 Sep;125(5):921-32. (PMID: 22610307) ; Theor Appl Genet. 2011 Apr;122(6):1211-21. (PMID: 21293840) ; Genetics. 2000 Jan;154(1):397-412. (PMID: 10628998) ; Theor Appl Genet. 1995 Jun;90(7-8):1079-86. (PMID: 24173066) ; Annu Rev Phytopathol. 2001;39:285-312. (PMID: 11701867) ; New Phytol. 2005 Aug;167(2):623-30. (PMID: 15998412) ; Theor Appl Genet. 2013 Aug;126(8):2039-49. (PMID: 23719761) ; Genetics. 1996 Jun;143(2):1001-12. (PMID: 8725245) ; Plant Cell. 1997 Aug;9(8):1279-87. (PMID: 9286106) ; Mol Genet Genomics. 2008 Aug;280(2):111-25. (PMID: 18553106) ; PLoS One. 2014 Jul 11;9(7):e98628. (PMID: 25014030) ; Plant Biotechnol J. 2003 May;1(3):167-85. (PMID: 17156030) ; Theor Appl Genet. 2013 Feb;126(2):359-67. (PMID: 23052021) ; Theor Appl Genet. 2009 Sep;119(5):795-803. (PMID: 19557383) ; BMC Genomics. 2013 Aug 15;14:556. (PMID: 23947483) ; Theor Appl Genet. 2012 Sep;125(5):909-20. (PMID: 22576236) Substance Nomenclature: 0 (Genetic Markers) Entry Date(s): Date Created: 20150213 Date Completed: 20150519 Latest Revision: 20220409 Update Code: 20240513

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Pl(17) is a novel gene independent of known downy mildew resistance genes in the cultivated sunflower (Helianthus annuus L.).