Maize Genetics Cooperation Newsletter vol 81 2007
This
report summarizes allele testing of viviparous stocks characterized only by
phenotype in the Maize Genetics COOP Stock Center collection. Here, pale kernels
linked to the viviparous trait characterized all stocks. Crosses were made as follows: +/vp* X +/vp9-R or +/vp* X +/vp9-Bot100. Ears were
scored at early maturity for the segregation of pale kernels. In crosses, most kernels were dormant
for the viviparous phenotype. This
could be due to the fact that ears were scored at an early stage of maturity.
In almost all crosses, pale kernels gave the characteristic greenish almost fluorescent cast found in the vp9-Bot100 allele
(Jackson, MNL 73:86, 1999). This
color slowly faded with exposure to sunlight.
New designations have been assigned to these alleles and these have been placed in the main collection. It is expected that with further sorting and allelism testing of viviparous stocks characterized by phenotype only, additional alleles of vp9 will be discovered. Stocks with this same phenotype that were found to complement vp9 will be tested for allelism with other stocks linked to pale endosperm.
|
Previous designation |
Allelism test with vp9 |
New designation |
MGCSC: stock # |
Dormant allele |
|
pale y-vp*-85-3140-15 |
3 positive |
vp9-85-3140-15 |
721A |
no |
|
pale y-vp*-87-2286-1 |
3 positive |
vp9-87-2286-1 |
721B |
yes in F2 w/ B73 |
|
pale y-vp*-87-2286-2 |
5 positive |
vp9-87-2286-2 |
721C |
yes in F2 w/ B73 |
|
pale y-vp*-87-2286-3 |
4 positive |
vp9-87-2286-3 |
721D |
yes in F2 w/ B73 |
|
pale y-vp*-87-2286-18 |
5 positive |
vp9-87-2286-18 |
721E |
yes in F2 w/ B73 |
|
pale y-vp*-87-2286-25 |
4 positive |
vp9-87-2286-25 |
721F |
yes in F2 w/ B73 |
|
pale y-vp*-88-3177-14 |
5 positive |
vp9-88-3177-14 |
721G |
no |
|
y-vp*-88-89-3613-25 |
10 positive |
vp9-88-89-3613-25 |
721H |
variable |
|
y-vp*-99-2226-1 |
4 positive |
vp9-99-2226-1 |
721I |
no |
|
y-vp*-6961 |
3 positive |
yp9-6961 |
721J |
variable |
|
y-vp*-8701 |
3 positive |
vp9-8701 |
721K |
no |
|
vp*-8113 |
2 positive |
vp9-8113 |
722A |
no |
|
y-vp*-81-15 |
5 positive |
vp9-81-15 |
722B |
no |
|
y-vp*-1982-2 |
7 positive |
vp9-1982-2 |
722C |
no |
|
vp*-8204 |
5 positive |
vp9-8204 |
722D |
no |
|
y-vp*-8206 |
5 positive |
vp9-8206 |
722E |
no |
|
y-vp*-8207 |
5 positive |
vp9-8207 |
722F |
no |
|
y-vp*-83-1A |
3 positive |
vp9-83-1A |
722G |
no |
|
pale y*-85-3005-22 |
5 positive |
vp9-85-3005-22 |
722H |
yes in F2 w/ B73 |
|
pale y*-85-3069-6 |
4 positive |
vp9-85-3069-6 |
722I |
yes in F2 w/ B73 |
|
pale y*-89-90-1525-23 |
2 positive |
vp9-89-90-1525-23 |
722J |
yes in F2 w/ B73/Mo17 |
Please Note: Notes submitted to the Maize Genetics Cooperation
Newsletter may be cited only with consent of authors.