02460naa a2200433 a 450000100080000000500110000800800410001902400310006010000280009124501530011926000090027252012390028165000120152065000230153265000120155565000300156765000130159765000120161065000280162265000240165065000130167465000250168765000140171265300200172665300130174665300110175965300080177065300140177870000220179270000190181470000230183370000200185670000210187670000200189770000210191770000210193870000200195977300470197920330442023-03-20       2015    bl uuuu     u00u1 u    #d7 a10.1534/g3.115.0230442DOI1 aLEAL-BERTIOLI, S. C. M.  aGenetic mapping of resistance to Meloidogyne arenaria in arachis stenospermaba new source of nematode resistance for peanut.h[electronic resource]  c2015  aRoot-knot nematodes (RKN; Meloidogyne sp.) are a major threat to crops in tropical and subtropical regions worldwide. The use of resistant crop varieties is the preferred method of control because nematicides are expensive, and hazardous to humans and the environment. Peanut (Arachis hypogaea) is infected by four species of RKN, the most damaging being M. arenaria, and commercial cultivars rely on a single source of resistance. In this study, we genetically characterize RKN resistance of the wild Arachis species A. stenosperma using a population of 93 recombinant inbred lines developed from a cross between A. duranensis and A. stenosperma. Four quantitative trait loci (QTL) located on linkage groups 02, 04, and 09 strongly influenced nematode root galling and egg production. Drought-related, domestication and agronomically relevant traits were also evaluated, revealing several QTL. Using the newly available Arachis genome sequence, easy-to-use KASP (kompetitive allele specific PCR) markers linked to the newly identified RKN resistance loci were developed and validated in a tetraploid context. Therefore, we consider that A. stenosperma has high potential as a new source of RKN resistance in peanut breeding programs.  aArachis  aChromosome mapping  adrought  aMarker-assisted selection  aNematoda  aPeanuts  aQuantitative trait loci  aRoot-knot nematodes  aAmendoim  aMeloidogyne arenaria  aNematoide  aMarker-assisted  aNematode  aPeanut  aQTL  aRoot-knot1 aMORETZSOHN, M. C.1 aROBERTS, P. A.1 aBALLEN-TABORDA, C.1 aBORBA, T. C. O.1 aVALDISSER, P. A.1 aVIANELLO, R. P.1 aARAUJO, A. C. G.1 aGUIMARAES, P. M.1 aBERTIOLI, D. J.  tG3: Genes, Genomes, Geneticsgv. 12, 2015.