Development of SCAR markers for sex determination in the dioecious shrub Aucuba japonica (Cornaceae).
Two sex-linked fragments were identified by RAPD analyses in the dioecious diploid shrub Aucuba japonica var. ovoidea and were converted into markers of male-specific sequence characterized amplified region (SCAR) markers. PCRs using the primers designed in this study correctly discriminated 24 flowering males and 24 flowering females at higher annealing temperatures (SCAR markers OPA10-424 at 55 degrees C and OPN11-1095 at 65 degrees C), although at relatively low annealing temperatures, the fragments were amplified in both males and females. These SCAR primers were also tested to see whether they were applicable to sex identification in the conspecific tetraploid Aucuba japonica var. japonica. One set pf SCAR primers could be used for sex identification even in this tetraploid variety, although the other failed. The SCAR markers developed in this study will provide a powerful tool in identifying the sex of immature plants of dioecious A. japonica, which is a commercially valuable shrub due to its conspicuous fruits.
Maki
Masayuki
M
Division of Ecology and Evolutionary Biology, Graduate School of Life Sciences, Tohoku University, 6-3 Aoba, Sendai, 980-8578 Japan. maki@mail.tains.tohoku.ac.jp
D001483:Base Sequence; D029767:Cornaceae / Q000235:genetics*; D018744:DNA, Plant / Q000235:genetics; D005819:Genetic Markers; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D019849:Sex Determination Processes
D018744:DNA, Plant; D005819:Genetic Markers