From Dave Matthews, 4/10/95 How to Create 2_Point_Data Records for GrainGenes A 2_Point_Data record is a GrainGenes object describing the genetic distance between two loci. Usually the distance is not part of a complete map, but was measured individually because it was of special interest, e.g. because one or both of the loci are genes. EXAMPLE 2_Point_Data : "Lr9/OPJ13" Locus_1 "Lr9" Locus_2 "OPJ13" Distance 0 Female_parent "Arina (P11)" Male_parent "Oberkulmer" Number_of_individuals 156 Reference "TAG-88-110" Contact "Keller, Beat" Data_source "Penner, Greg" 94.11.16 Associated with any 2_Point_Data record would be additional information in regular Locus records like: Locus "Lr9" Type "Gene" Associated_gene "Lr9 (Triticum)" Chromosome "6B" Chromosome_arm "6BL" , as well as Germplasm records for the parents, the Reference record, and Colleague records. FIELDS AVAILABLE Note that some fields are alternative options; no record would contain values for all of these fields. ----------------------------------------------------------------------------- Field name Sample Entry Description or List of Choices ----------------------------------------------------------------------------- 2_point_data Lr9/OPJ13 Names of the two loci, gene first Locus_1 Lr9 Name of first locus Locus_2 OPJ13 Name of second locus Distance 0 Distance between loci Error 10 Uncertainty in distance estimate Distance_units "% recombination" Units for distance value [Any text] Linkage "Real close" Textual qualitative evaluation, if no numeric value given in Distance QTL --- If field "QTL" is present, one of the Loci is a QTL. Female_parent "Ace CItr13384" ID of Germplasm record corresponding to female parent. Include accession number if possible. Male_parent "Baca CItr15891" Male parent Parent "Baca CItr15891" If cross was reciprocal or unknown Generation "F2" Kind of mapping population Number_of_individuals 156 Size of progeny population scored Method ? (Would this be a useful field?) Contact "Keller, Beat" Name of Colleague who did the work, and/or the Principal Investigator Reference "TAG-88-110" ID of literature Reference record Remark "Hot marker!" [Any text] Data_source "Penner, Greg" 94.11.16 Colleague and date submitted -----------------------------------------------------------------------------