|
|
|
|
|
|
|
||||
| Home Help Feedback Subscriptions Archive Search Table of Contents | ||||
|
Fig. 12. Non-autonomous factors underlying the differences in pigment pattern
metamorphosis between D. rerio and D. nigrofasciatus,
revealed by interspecific genetic mosaic analyses. Shown are selected days in
the development of two representative chimeras (n=10), taken from a
complete image series through pigment pattern metamorphosis. (A-D) D.
nigrofasciatus cells transplanted into albino mutant D.
rerio. Melanized donor melanophores differentiate at embryonic stages
within the early larval melanophore stripes (arrowheads, A). Yet these donor
melanophores fail to contribute to the ventral primary melanophore stripe, as
for host melanophores. Subsequently, donor metamorphic melanophores
differentiate over the flank and contribute to adult primary melanophore
stripes located at positions that are indistinguishable from host stripes.
Arrow in D marks the primary ventral melanophore stripe (a, aorta; compare
with Fig. 3E). (F-I) D.
nigrofasciatus cells transplanted to nacre mutant D.
rerio. Despite the absence of host melanophores, donor early larval
melanophores still fail to contribute to the ventral primary melanophore
stripe, which forms in the normal position for D. rerio (arrows,
G-I). In this individual, a secondary adult melanophore stripe comprising
late-appearing metamorphic melanophores has started to form ventrally (small
arrow, I). Schematics (D',I') illustrate the locations of early
larval melanophores (brown) and metamorphic melanophores (black), as revealed
by following individual cells throughout development. Dorsal scale-associated
melanophores are omitted for clarity.
|
