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Triticeae Genomics and Genetics 2013, Vol.4, No.2, 3
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11
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4
CR3 (UPF 16/URPEL 15) for the character PP was
observed with the
t
test analysis (Table 1). Higher
values were observed for segregating generations,
especially F
2
, as opposed to the F
1
generation, where
more reduced values were observed. For the
characters GY P
-1
and PP, a probable expression of
heterosis on the F
1
generation was observed, for all
crosses, with a highlight for CR1 (UPF 16/UPF 18) in
the character GY P
-1
. For the character NP P
-1
,
however, the same behavior was not observed but still
CR1 was the only combination showing a heterotic
effect for the character. The cultivar UPF 16 deserves
some special credit, since when it was present in the
evaluated combinations. It influenced decisively the
increase in the character GY P
-1
as revealed by the
high performance of its F
1
hybrids, suggesting that
this parent transfers to its progeny alleles that
contribute to the superior performance.
Table 1 Number of plants (n), means and variances for P
1
, RC
1
F
1
, F
1
, F
2
, RC
2
F
1
and P
2
generations for three characters in five oat
crosses
(+)
Grain yield per plant (GY P
-1
)
Note: * Significant difference between the parental medium by t test (p<0,05);
(+)
CR1 (UPF 16/UPF 18); CR2 (UPF 16/UFRGS 7);
CR3 (UPF 16/URPEL 15); CR4 (UPF 18/UFRGS 7); CR5 (UPF 18/UFRGS 17); ** the same number of evaluated plants for GY P
-1
,
NP P
-1
and PP characters in each crosses
Grain yield per plant (GY P
-1
)
P
1
RC
1
F
1
F
1
F
2
RC
2
F
1
P
2
n**
31
23
28
224
31
37
mean
16.43
23.16
30.78
20.09
21.82
11.43
CR1
variance
5.53
10.36
4.56
14.16
10.44
5.97
n**
23
30
31
208
24
29
mean
16.19
23.44
21.25
16.46
23.25
13.63
CR2
variance
7.04
11.67
4.63
12.27
9.84
6.32
n**
25
22
36
210
29
23
mean
16.55
21.88
16.92
15.52
15.48
12.66
CR3
variance
6.42
15.73
3.45
17.16
13.50
5.07
n**
27
37
29
222
26
39
mean
11.13
12.39
13.85
12.34
14.92
13.65
CR4
variance
5.34
9.68
4.94
10.58
7.75
5.30
n**
37
25
33
136
34
41
Mean
10.91
7.73
13.21
12.44
11.27
11.53
CR5
variance
5.13
5.53
4.32
9.40
9.27
4.65
Number of panicles per plant (NP P
-1
)
mean
10.78
10.94
8.76
7.63
8.66
5.93
CR1
variance
3.26
7.27
1.69
8.53
7.53
2.82
mean
10.92
9.77
8.42
7.57
11.83
10.88
CR2
variance
3.83
6.30
2.25
7.36
6.69
3.20
mean
10.64
8.23
6.66
6.69
6.25
7.12
CR3
variance
1.32
3.19
1.73
5.24
4.73
1.79
mean
5.89
5.66
6.10
5.34
7.15
10.20
CR4
variance
2.32
3.47
1.58
5.10
4.71
2.11
mean
4.70
4.57
4.96
5.31
4.88
6.07
CR5
variance
1.32
3.25
1.22
3.32
2.92
1.62
Panicle weight per plant (PP)
mean
3.31
4.92
7.07
5.55
4.95
4.44
CR1
variance
0.48
1.58
0.88
2.43
1.96
0.44
mean
3.26
4.66
5.00
4.52
5.00
3.00
CR2*
variance
0.36
1.17
0.44
1.62
1.27
0.52
mean
2.98
4.75
4.58
4.58
4.23
3.74
CR3*
variance
0.50
1.34
0.50
1.81
1.73
0.41
mean
5.27
6.21
5.60
5.24
4.28
3.05
CR4
variance
0.64
1.36
0.61
2.63
2.20
0.36
mean
4.43
5.73
5.64
4.75
4.66
3.29
CR5
variance
0.75
1.09
0.53
1.99
1.17
0.81