LIBRO-CONGRESO-CITRUS

are vigorous with nearly round-shaped fruit, high yields and good storage quality. The length of shoots,
thorns and petals is longer than with other clones. The average fruit weight is about 130 g, much smaller
than ‘Ougan’, rind thickness is 3.8 mm, thinner than ‘Ougan’, and the edible rate is 69.9%, significantly
higher than common and seedless ‘Ougan’. The total soluble solids of fruit juice is 9.5%, lower than other
clones. Both of the content of total acidity and Vitamin C do not differ significantly with other clones of
‘Ougan’. The fruit shape of ‘Qing-ougan’ is depressed at the stalk end, but the common ‘Ougan’ is usually
slightly rounded. ‘Qing-ougan’ can maintain green peel up to the following March under common storage
conditions, but color can change under ethylene ‘de-greening’ treatment. This indicates some chlorophyll
degradation. For these reasons, ‘Qing-ougan’ could be an important germplasm material for breeding and
genetic studies.
S02P38
Hybridization-based citrus breeding program in Turkey
Uzun A. 1 , Gulsen O. 1 , Seday S. 2 , and Kafa G. 2
1Erciyes University, Department of Horticulture, Turkey; and 2Alata Horticultural Research Station, Genetics and Breeding, Turkey.
aydinuzun@erciyes.edu.tr
Breeding studies to develop new cultivars in citrus have been carried out using traditional methods, such as
selection, mutation and hybridization. We have carried out in Turkey a mandarin breeding program based on
hybridization for the last ten years. Clementine mandarin was used as maternal parent and many cultivars
from several species were used as male parents. So far, over 4000 hybrids have been already evaluated. Up
to now several promising hybrids with different characteristics have been selected. The genotype ’33-6’ from
a clementine X ‘Orlando’ tangelo cross is the most promising one, with large fruit (175 g) and dark orange
rind color and it exhibits early maturity (October). The hybrid genotype ’20-2’ from a clementine X ‘Valencia’
orange cross was found to be late maturing (April) and it has large fruits and good appearance. A hybrid
from a clementine x ‘Cocktail’ grapefruit, ’39-9’ cross has very large fruit (244 g) with attractive shape and it
is harvested in November. ‘CO-44’, from a clementine X ‘Orlando’ tangelo cross has large (167 g) and early
maturing fruit (October). In addition to these hybrids, many genotypes with good characteristics are also
being selected. In the near future the new superior cultivars will be released.
S02P39
‘BATEM Fatihi’: A New Orange Selection from cv. ‘Washington’ navel
Eryılmaz Z. 1 , Dal B. 1 , Tuncay M. 2 , Balkılıç R. 3 , and Gübbük H. 3
1Batı Akdeniz Agricultural Research Institute (BATEM), Fruit Research, Turkey; 2Retired agricultural engineer; and 3University of
Akdeniz, Faculty of Agriculture, Department of Horticulture, Turkey. zeyneper07@gmail.com
Citrus variety improvement programme has been continuing in Turkey during last 30 years. During the
period 1979 to 1983, a total 42 promising genotypes grown in different citrus locations and that have better
earliness, yield and quality characteristics from main cultivars ‘Washington’ navel has been selected. An
adaptation parcel was established with these selected types in 1991 in Antalya. After a long term evaluation,
4 promising types were determined and 2 of them has been registered in 2011 as new orange cultivars.
One of the registered cultivars named as ‘BATEM Fatihi’ has been compared with cv. ‘Washington’ navel in
terms of maturation time, yield and quality characteristics. The results of the study showed that cv. ‘BATEM
Fatihi’ has better fruit and tree characteristics such as earlier harvest, compact growth habit, higher yield
capacity and bigger fruit, thinner peel, higher juice yield and soluble solid content than cultivar ‘Washington’
navel. The fruit maturation time was second week of November for cv. ‘BATEM Fatihi’ and the first week od
December for cv. ‘Washington’ navel. The yield per tree was recorded as 120 kg for cv. ‘BATEM Fatihi’ and 80
kg for cv. ‘Washington’ navel. The peel thickness, soluble solid content and fruit juice yield were 5.49 mm,
10.62% and 49.57% for cv. ‘Washington’ navel and these values were 5.07 mm, 10.57% and 49.57% in cv.
‘BATEM Fatihi’, respectively.
XII INTERNATIONAL CITRUS CONGRESS 2012 - 57
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