The research was carried out at Tal Hedya Research Center in Aleppo, General
Commission for Agriculture Scientific Research (GCSAR), Syria, during 2011
and 2012 seasons. Seven genotypes of cotton were used, and complete diallel
hybridization was m
ade to study general and specific combining ability of some
productivity traits (sympodial branch number, actual boll number and seed cotton
yield). General combining ability (GCA) indicated that the parental genotype
Cherpan432 had a high significant GCA for sympodial branch number and actual
boll number, but the parents Aleppo118 and Deir El-Zour22 had the high GCA for
seed cotton yield. This is a clear indication that these parental genotypes had the
largest number of additive genes action, which plays important role in the inheritance
of the above-mentioned traits. The estimation of SCA values showed favorite and
high significant values in many hybrids resulted from parents, which had highly
significant GCA, which means that the gene action type is (additive x additive), and
this refers that these hybrids possessing the largest number of additive genes. High
heritability broad sense refers to importance of genetic variance in the inheritance of
all characters, but heritability in narrow sense values were low in general, indicating
the importance of dominance and epistasis genes in the inheritance. According to
this result it is recommended to follow the cross method for improvement of the
studied traits.
The experiment was conducted at the Research Station of Middle Heights,
during 2014 and 2015 seasons. Three varieties of Quinoa were used i.e. Ames
13762, NSL 106398 and Ames 137, which were introduced from International
Center for Bio Saline Agri
culture (ICBA), and they were selected out of five
varieties that were grown as observation lines in 2013, to get one variety, high
forage and grain yields, also suitable for the local conditions. RCBD design
with four replications was used. The traits that were studied were: Earliness,
plant height, flowering at 50%, green forage, grain and dry matter yields.
Results indicated that there were highly significant (p≤0.01) differences
between seasons and varieties in respect to plant height, green forage, dry
matter and grain yields. While, no significant effect for the interaction between
varieties and seasons overall growth performances.