Proceedings
of the XLVI Italian Society of Agricultural Genetics - SIGA Annual Congress
Giardini Naxos, Italy - 18/21
September, 2002
ISBN 88-900622-3-1
Poster Abstract -
4.44
COMBINING ABILITY OF FOUR HIGH OLEIC
SUNFLOWER (HELIANTHUS ANNUS L.) RESTORERS
DEL
GATTO A., LAURETI D.
Istituto
Sperimentale per le Colture Industriali, Via Cinque Torri 26, 60027 Osimo
high
oleic RHA and CMS, conventional hybrids, high oleic hybrid
In spite to the discovery in
1976 of the mutation giving the high oleic sunflower, and the increased in oil
price, the cultivars using these genes are relatively few and often not as
productive as the conventional ones. Moreover, the varieties available were
selected abroad, in different environments. In addition, they are larger in
size and later and have un irregular oleic acid content (Del Gatto e Laureti, 2002).
The Osimo Section of the
Italian Experimental Industrial Crops Institute (ISCI) has worked for some
years in selecting high oleic lines (RHA and Cms), well buffered to the
environmental conditions of Central Italy, whose combination gives suitable
hybrids comparable to the conventional ones. One of these (CRONO) was evaluated
in 2000, in Osimo (Table 1), in drought and rainfed conditions, and in 2001
(Table 2), in two locations (Osimo – AN and Budrio – BO).
In the first evaluation, among
70 experimental hybrids, Crono was more productive in achenes and oil. It was
similar to 6 conventional commercial controls selected among the most
productive, even if, the seed oil content was little less than best ones.
Similar results were also
abtained in the 2001 where Crono was as productive as the conventional hybrids
with comparable agronomic characteristics.
Table 1.
Productive, phenological and biometric data of a high oleic hybrid (Crono)
compared to 6 conventional commercial controls in rainfed and irrigated
conditions. (In the table were reported only the most productives controls)
|
Hybrids |
Yield (q/ha) |
Oil (%) |
Oil yield (q/ha) |
Cycle (d) |
Flower. (d) |
TSW (g) |
Pl. height (cm) |
|
Crono |
37,2 ab |
48,0 b |
16,3 a |
143 |
171 |
46,3 |
154 |
|
Coriolis |
36,8 ab |
48,1 b |
16,0 a |
143 |
165 |
53,7 |
131 |
|
Sanbro |
41,7 a |
45,3 c |
17,0 a |
147 |
164 |
51,6 |
146 |
|
Starsol |
36,2 ab |
48,0 b |
15,8 a |
145 |
168 |
40,0 |
145 |
|
Select |
38,7 ab |
52,6 a |
18,5 a |
150 |
168 |
47,5 |
140 |
|
LSD(p 0,05)* |
6,0 |
2,2 |
2,9 |
3,7 |
1,6 |
5,3 |
2,4 |
* In this and the next table the
means with different letters are different at P≤0,05.
Table 2.
Yield, yield components, cycle duration and plant height of Crono, a high oleic
hybrid, compared to 5 conventional sunflower hybrids in two location. (In the table
were reported only the most productives controls)
|
Hybrids |
Yield (q/ha) |
Oil (%) |
Oil yield (q/ha) |
Cycle (d) |
Flower. d) |
Pl. height (cm) |
|
Crono |
39,9 ab |
52,4 b |
19,0 ab |
140 |
178 |
187 |
|
Starsol |
38,7 b |
50,4 b |
17,8 ab |
130 |
175 |
176 |
|
Sanbro |
44,3 a |
49,9 b |
20,1 a |
134 |
172 |
188 |
|
Select |
36,8 b |
54,4 a |
18,2 ab |
148 |
177 |
185 |
|
LSD(p 0,05) |
5,2 |
1,9 |
2,6 |
5,0 |
1,0 |
10,0 |
References
Laureti
D., Del Gatto A. 2001. Proceedings of the XLV Italian Society of Agricultural
Genetics- SIGA annual Congress. Salsomaggiore Terme, Italy 26-29 September.