Study On Genetic Diversity Of Maize Inbred Lines By SSR And SNP Markers

In this experiment, under built72domestic commonly used fingerprint databaseand analyzed of genotypes genetic diversity about72maize inbred lines utilizing40pairs of fluorescence prime and1041SNP marker locus. The result follows:1.Under analysis of genotypes about72maize inbred lines utilizing40SSRmarker locus, the number of allele was256,average of allele was6.4,the rangewas2~13; the number of genotype was339,average was8.5; the PIC rangingfrom0.099～0.850,the average PIC was0.630, the MAF ranging from0.007～0.208,the average PIC was0.031;the range of genediverdity was0.105-0.864,average genediversity was0.673; the genetic distance ranging from0.025to0.9366.2.Under analysis of genotypes about72maize inbred lines utilizing1041SNPmarker locus, the number of allele was2082,; the number of genotype was2606,average was2.6; the PIC ranging from0.141to0.375,the average PIC was0.345; the MAF ranging from0.122to0.500, average MAF was0.360; the rangeof genediverdity was0.152～0.5,average genediversity was0.445; the geneticdistance ranging from0.0092to0.7041.3.72inbred lines is divided into seven heterosis group by two methods. Itincludes Reid, Improved Reid, Lancaster, Luda Red Cob, Tang-Si-Ping-Tou, Pand Waxy groups.The clustering results were nearly consistent with the pedigreeinformation4．Waxy maize inbred lines is an independent heterosis group-waxy group. It is afarther genetic distance that Waxy group and another six heterosis group andthere are many differences between waxy maize and common corn at themolecular level.5. The main maize hybrid heterosis pattern in our country is ImprovedReid×Tang-Si-Ping-Tou, P×Tang-Si-Ping-Tou, P×Luda Red Cob,Tang-Si-Ping-Tou×Lancaster. These were all Inland×Foreign.