The research was conducted at Al-Jmmaseh station – the Agricultural Research Center in Tartous- to estimate heterosis, combining ability of yield and some fruit traits. Fifteen hybrids were produced by half diallel crossing method in 2013. These
were evaluated in 2014. Most hybrids were characterized by highly significant heterosis values for all the studied traits compared with mid parents and better parents. Heterosis reached (87.76, 50.13)% for yield per plant, (71.44, 43.09)% for average of fruit weight, (19.67, 12.31)% for fruit length, (38.21, 21.43)% for fruit diameter, and (32.5, 20.46)% for number of locules per fruit in comparison with mid parents and better parents respectively.
The best hybrids were: (Ou×H) (Ou×W) (Or×H) and maybe they could be promising hybrids if they had superiority in other important traits. Variance due to general and specific combining ability were highly significant for all traits. This ensured that both types of genetic action (additive and non-additive) controlled the inheritance of these traits. σ2GCA/σ2SCA ratio of the additive genetic action overcame the one of non-additive cation in these traits: number of locules per fruit, average of fruit weight and fruit diameter, while the non-additive genetic action was superior in fruit length and total yield.
this study was carried out during summer 2014 in Siano Research Station- the
Agricultura Research Center in Lattakia . Four varieties of Cowpea: Dolicho (entrance),
Blackey (entrance), Almaarefa (Local) and local
cultivar were planted and compared
concerning the vegetative growth , productivity
and quality of green pods.
The results showed the superiority of Almaarefa cultivar in some vegetative traits
:plant hieght (166.66) cm compared with local cultivar 116.58 cm ,number of leaves on
plant and( 27) leaves and( 17) leaves for local cultivar, and plant leaves area( 7840.23)
cm2 for Almaarefa comparing with( 4499.75) cm2 for local cultivar
As well as it had a maximum pod length( 16.71) cm and highest grain number of
pod( 9.44) ,while Blackey cultivar was the most superior comparing with
other cultivars in productivity( 0.6229) kg \ m 2 and pod's number/m2 ( 81.069)
Whereas Almaarefa had the lowest productivity( 0.4935) kg/m2 and lowest pod's number
( 65.89)pod/m2.
The results also showed that the local cultivar had the most vitamin C content
comparing with other cultivars by( 23.765%) and in dry matter by (15.38%) , while
there was no significant differences between protein green pods content.
Genotypic and phenotypic coefficient of variance, broad and narrow-sense
heritability, expected genetic advance and relative genetic advance of earliness
characteristics in six pea hybrids produced by 4 x 4 half-diallel crossing scheme
were estima
ted. The results, in general, showed low values of phenotypic
coefficient of variance (in all crosses) of days to beginning of flowering and days
to marketable maturity; which may indicates to a low effect of environmental
variation on the expression of both these characters, but were medium to high
for number of low internodes and internode's length. Estimates of heritability
in broad sense were medium to high for days to beginning of flowering (0.42 –
0.90) and days to marketable maturity (0.42 – 0.91), and biased estimates of
narrow-sense heritability have been recorded in most of the crosses and in
majority of the parameters studied; so we can’t adopt them as reliable data.
The highest estimates of relative expected genetic advance of number for low
internodes have been observed in Mutant-3 x Dasargelo (25.95%) and
Dasargelo x Nassra (25.11 %) and for internode's length in Dasargelo x Oterlo
(37.31 %). The selection procedure can be effectively made for achievement
further improvement of internode's length in early segregating generations of
Dasargelo x Oterlo hybrid; because it has high values of genotypic coefficient of
variance, broad-sense heritability and relative expected genetic advance.
Thirteen phenotypes of cultivated wild olive were selected during 2007- 2008
from four orchards in Mesiaf region, to study oil percentage and fatty acids
contents in these types for choosing types for oil production, in order to
propagate and cons
erve them in a germplasm, and then to be cultivated
because they have adapted to local climate in this region. The results were
analyzed statistically by using Gen-State program to calculate least significant
differences between values. The results confirmed the high biodiversity in these
studied types, and they were classified into five groups according to their oil
percentage and contents of oleic acid. The oil percentage ranged from 3.9 to
27.3 %, and the fatty acids had significant differences between them, the oleic
acid was in olive oil between 56.7 and 75.5%. The types P1-1 and p1-3 showed
the best results for producing oil.
This research was carried out during the years (2010 – 2014), in
order to study the vigour for trees of six wild olive types which were
selected from the natural forest (In situ) in Moseif region, and the
vegetative rooted cutting at 4 years old in the nursery (Ex situ) in
comparison with The variety Al Safrawi.
