Mapping of gsa-1
Mapping populations were created by crossing the gsa-1 mutant
(Col-0) with wild-type plants of Ler, and their F1 progeny were
propagated by self-fertilization. F3 progenies from individual F2
plants were subjected to a gravitropism assay to determine the
corresponding gravitropic genotype of the F2 parents. Homozygous
F2 progeny mutant plants were selected and used to map
gsa-1 by bulked segregation analysis. The protocol of mapping
has been described previously (Li et al., 2012). DNA was
extracted from each pool and subjected to PCR amplification
with InDel (Insertion/Deletion) primers (Salathia et al., 2007).
The candidate gene GSA-1 was linked with CER464751 (F: