BROOKINGS, SOUTH DAKOTA
South Dakota State University
Identity and location of v26
--Whalen, RH

The recessive mutant virescent26 was obtained by Neuffer and Beckett (MNL 61:50, 1987), who originally designated it as v-453A. They placed it on 2S since it was uncovered by TB-3La-2S(6270) but not by TB-3La.

Linkage tests with other 2S markers were made to map v26. The source of our v26 stock was Coop. 89-582-1. Seedlings are strongly yellowish-white, and green slowly from tip to base without becoming grainy. Culms, leaf sheaths, and husks are whitish, although the MNL gene lists and description in Mutants of Maize (Neuffer, Coe and Wessler, 1997) do not mention this. Some variability in expression was noted among our progenies for these traits at anthesis, however. Viability is normal and ears are obtained if adjacent normal sibs are removed early. The F2 repulsion data were as follows:
 
Marker
+ +
+ m
v +
v m
Total
X2 indep. (1 d.f.)
fl1-o4
302
132
105
39
578
0.576
gl11
195
54
70
13
332
1.402
gl2
691
262
283
19
1255
59.317
lg1 496 215 221 3 935 79.569

These data place v26 about 27 cM distal to gl2 and 12 cM distal to lg1, which is very near ws3. Because of this location and the similarity of culm, sheath and husk phenotypes of v26 to ws3, we tested the two mutants for allelism. Surprisingly, the ws3 stock obtained from the Maize Coop. also had virescent seedlings, although this is not stated in the MNL gene lists or in Mutants of Maize. Crosses between these two mutants proved them to be allelic. The symbol ws3 has priority.
 


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