Genetic mapping and QTL analysis for yield and agronomic traits with an F2:3 population derived from a waxy corn 3 sweet corn cross

• Published in: Genes & genomics pp. 179 - 189
• Main Authors: 박기진, 고희종, 이주경, 사규진, 김병완
• Format: Journal Article
• Language: English
• Published: 한국유전학회 01.04.2014
• Subjects: 생물학
• ISSN: 1976-9571; 2092-9293
• DOI: 10.1007/s13258-013-0157-6

We constructed a framework map using SSRmarkers in the F2 population derived from a cross betweena waxy corn inbred line and a sweet corn inbred line. Weconstructed a genetic linkage map of the F2:3 populationemploying 295 SSR markers on 158 F2 individuals producedfrom the cross. The map comprised a total genomiclength of 2,626.5 cM in 10 linkage groups and an averagedistance between markers of 8.9 cM. The number of lociper linkage group ranged from 27 (chr. 5) to 34 (chr. 7). The genetic distance per linkage group ranged from213.6 cM (chr. 10) to 360.6 cM (chr. 2). V2 tests revealedthat 254 markers (86.1 %) distributed over all 10 chromosomesexhibited a Mendelian segregation ratio of 1:2:1. A total of 14 quantitative trait loci (QTLs) for days tosilking (DTS), plant height (PH), ear height (EH), earheight ratio (ER), ear length (L-ear), and setted ear length(L-sear) were found in the 158 F2 progeny. They weremapped to chromosomes 1, 2, 3, 7, 8, and 10. Among them,one QTL was associated with DTS, three with PH, six withEH, one with ER, two with L-ear, and one QTL was relatedto L-sear. In our study, we found that four QTLs: qDTS1,qEH1a, qEH1b, and qPH1, were clustered betweenumc2390 and umc1603 on chromosome 1. These newQTLs identified by the present study could serve as usefulmolecular markers in selecting for yield and agronomictraits in maize. The results of this study may improve theidentification and characterization of genes responsible foryield and agronomic traits in waxy corn and sweet corn. KCI Citation Count: 7