Table 1. Cytogenetic study of Zea mays, Tripsacum dactyloides, Z. mays x T. dactyloides F1 hybrid plants (ZmT)and their progeny (pZmT): chromosome number, averages of uni-, bi-, tri and tetravalents per cell (PMC) and chiasmata cell-1. |
Genotype |
2n |
Meiotic configurations |
Chiasmata cell-1 |
Nº of PMC* |
|||
I |
II |
III |
IV |
||||
Zea mays |
40 |
0.04 |
3.15 |
0.04 |
8.27 |
33.75 |
143 |
T. dactyloides |
72 |
0.01 |
20.65 |
0.01 |
6.80 |
58.50 |
153 |
ZmT |
56 |
0.27 |
25.28 |
0 |
1.11 |
40.63 |
129 |
ZmT |
56 |
0.62 |
25.16 |
0 |
1.30 |
39.07 |
111 |
ZmT |
56 |
0.63 |
23.70 |
0 |
1.94 |
44.50 |
108 |
ZmT |
56 |
0.70 |
26.58 |
0 |
0.41 |
42.80 |
105 |
pZmT |
22 |
0.04 |
10.70 |
0 |
0.14 |
30.52 |
96 |
pZmT |
22 |
0.17 |
10.63 |
0 |
0.03 |
20.13 |
105 |
pZmT |
22 |
0.07 |
10.60 |
0 |
0.18 |
20.09 |
118 |
pZmT |
24 |
0.06 |
11.35 |
0 |
0.31 |
22.70 |
146 |
pZmT |
26 |
0.04 |
10.20 |
0 |
1.20 |
24.00 |
84 |
pZmT |
26 |
1.00 |
10.00 |
0 |
0.92 |
21.00 |
89 |
pZmT |
26 |
0.08 |
12.35 |
0 |
0.31 |
24.26 |
105 |
pZmT |
26 |
0.06 |
12.06 |
0 |
0.45 |
22.15 |
121 |
pZmT |
26 |
0.16 |
12.43 |
0 |
0.24 |
22.78 |
92 |
pZmT |
28 |
0.05 |
10.89 |
0 |
1.54 |
26.19 |
104 |
pZmT |
28 |
0.03 |
11.20 |
0 |
1.39 |
25.32 |
78 |
pZmT |
30 |
0.04 |
13.76 |
0 |
0.58 |
24.22 |
100 |
* PMC: Pollen mother cells. |
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