orange endosperm mutation

Ed Coe ed at teosinte.agron.missouri.edu
Sat Oct 2 15:14:36 EST 1999


Hi, Amie.
See pink scutellum, ps1 (aka vp7), which has pink endosperm
and scutellum and is also viviparous.  The color in this
case is due to accumulation of lycopene, a carotenoid
produced in tomatoes.
Ed Coe
P.S. I depended partly on "recall" of the association of
reddish color with vivipary in this case, and looked up this
mutant.
Search strategies in MaizeDB that would work would be to
click on "Traits" in the sidebar, choose Phenotype, enter
vivip in the Name field, click Retrieve, review the
"Genotypic Variations" that show up and click on prospects
(or better, click on the Trait dormancy, go to it, review,
and click on prospects whose NAMES are listed).  [[aha.  I
see rea1, red embryonic axis1, as another prospect]]
Alternate strategy: In the Phenotype form, enter red in the
Name field.
P.P.S. Your inquiry is helpful; we are working to refine
terms and linkages so that they can be more effectively accomplished.
e)


Amie Franklin wrote:
>
> Dear Knowledgeable Maize Researchers,
>
> I appear to have a new (to me) mutation that confers both an orange
> endosperm and a dark orange to red embryo. This appears to be
> segregating 3:1 and I do not think it is orp1 and orp2. Some of the
> embroyos may be slightly viviparous. Any ideas? In the maize database
> there are references to orange endosperm mutations but there are no
> stocks available for allelism crosses, etc.
>
> Your thoughts would be appreciated.
> Thanks,
> Amie
>
> --
> Dr. Amie E. Franklin
> ********************
> franklin at candelab.berkeley.edu
> 345 LSA, MCB Dept.
> U.C.Berkeley
> Berkeley, CA 94720
> lab (510) 643-8277
> fax (510) 643-6791



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