The format is:
List of 10
$ geno : num [1:100, 1:68] 3 1 3 1 1 1 1 1 1 1 ...
..- attr(*, "dimnames")=List of 2
.. ..$ : chr [1:100] "ID1" "ID2" "ID3" "ID4" ...
.. ..$ : chr [1:68] "M1" "M2" "M3" "M4" ...
$ n.ind : int 100
$ n.mar : int 68
$ segr.type : chr [1:68] "A.B" "A.B" "A.B" "A.B" ...
$ segr.type.num: logi [1:68] NA NA NA NA NA NA ...
$ n.phe : int 0
$ pheno : NULL
$ CHROM : NULL
$ POS : NULL
$ input : chr "onemap_example_riself.raw"
- attr(*, "class")= chr [1:2] "onemap" "riself"