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Register a new userStudy of Genetic Behavior of Grain Yield and its Components in Barley Crosses
دراسة السلوكية الوراثية للغلة الحبية و مكوناتها في هجن من الشعير
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نفذت هذه الدراسة بالتعاون بين كلية الزراعة جامعة دمشق و الهيئة العامة للبحوث العلمية الزراعية في محطة قرحتا لبحوث المحاصيل الحقلية خلال موسمي الزراعة 2003/2004 و 2004/2005 حيث تم التهجين بين أربع سلالات و أصناف محلية محسنة من الشعير (أمهات) و خمس سلالات و أصناف مدخلـة (آباء) بطريقة سلالة × مختبر (Tester×Line) وزرعت الهجن مع آبائهـا وفـق تصـميم القطاعـات العشوائية الكاملة بثلاثة مكررات لتقدير كل من القدرة العامة على التوافق (GCA) و القدرة الخاصة على التوافق (SCA) و قوة الهجين بالنسبة لكل من متوسط الأبوين و الأب الأعلـى لمتوسـط الأبـوين و الأب الأعلى لصفات عدد السنابل في النبات، عدد الحبوب في السنبلة، وزن 1000_حبة و الغلـة الحبيـة فـي النبات.
This study was carried out in cooperation between the Faculty of Agriculture, Damascus University and the General Commission for Scientific Agricultural Research (GCSAR) in Karahta station of field crops researches during two growing seasons (2003-04 & 2004-05). Four local improved barley lines and cultivars (female parents) were crossed with five exotic lines and cultivars (male parents) using line × tester method. The crosses were grown along with their parents in a randomized complete block design (RCBD) with three replications to estimate general combining ability (GCA), specific combining ability(SCA) and both mid and high parent heterosis for number of spikes per plant, number of grains per spike, thousand kernel weight, and grain yield per plant.
References used
Arabi, I. E. and Nabulsi, I. (2005). Durable resistance to net blotch and agronomic performance in barley doubled haploid lines. J. Genet. & Breed. 56, 145-153
Bouzerzour, H. and Djakoune, A. (1997). Inheritance of grain yield and grain yield components in barley. Rachis 16 (1-2), 9-16
Budak, N. (2000). Heterosis, general and specific combining ability estimates at F1 and F2 generations of a 8×8 diallel cross population of barley. Turk. J. Field Crops, 25-36
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This study was carried out at Karahta Station, Dept. of Field Crops
Researches, General Commission for Scientific Agriculture Researches
(GCSAR) Damascus, Syria, during the growing seasons (2009-2010, 2010-2011).
The crosses were grown inatrial us
ing randomized complete block design
(RCBD) with three replicates in order to evaluate number of spikes per plant,
number of grains per spike, thousand kernel weight and grain yield per plant
and estimate some genetic indices: broad scenes heritability (BSH), narrow
scenes heritability (NSH), and genetic advance (GA). Seeds of five populations
of the three evaluated single hybrids were formed by crossing of five inbred
lines. Analysis of variance results showed significant differences among mean
values of the five populations of each cross for all studied traits. The results
revealed that the broad scenes heritability ranged between high and moderate
for the following productivity traits (SP/PL, GR/SP, TKW and GY/P) and it
was (75, 40, 57) (38, 80, 38) (74, 60, 85) and (73, 73, 71) for the three crosses,
respectively. Additive gene action noticed on most traits indicated less selection
cycles to improve these traits.
The Experiment was conducted during the successive growing
seasons (2013/2014- 2014/2015) where half–diallel hybridization was
conducted between eight genotypes of bread wheat.
A half diallel set of crosses among six highly diverse barley (Hordeum
vulgare L.) genotypes were evaluated at Karahta Research Station, General
Commission of Scientific Agricultural Research (GCSAR), during 2010-2011
and 2011-2012 seasons to stud
y heterosis, potence ratio, correlations among
traits and path coefficient analysis for number of spikes per plant, number of
grains per plant, number of grains per spike, biological yield ,and grain yield
per plant. Heterosis effects for seed yield ranged from%-89.52 (T-6669×S-6303)
to%16.99 (Arabi abiad mohsan×S-6689) and from%-49.94 (L-6711×S-6689)
to %-1. 35 (Arabi abiad mohsan×S-6689) relative to mid and better parents
respectively. Potence ratio values ranged from 1.14 (number of spikes per
plant) to 3.50 (biological weight) indicating that non-additive gene action was
more important in controlling all studied traits. Correlation coefficients among
traits indicated that seed yield was positively and significantly associated with
each of number of spikes per plant (0.289), number of grains per plant (0.832),
number of grains per spike (0.587), and biological yield (0.708) traits. Path
coefficient analysis indicated that number of grains per plant trait had high
positive direct effects on grain yield.
This study was carried out during 2010-2011 growing seasons at the
Maize Researches Department (G.C.S.A.R.) Damascus. To estimate
heterosis for number of rows per ear, ear length, ear diameter, 100- kernel
weight, and grain yield.
A half diallel set of crosses among six inbred lines of maize were evaluated at the
Maize Research Department (G.C.S.A.R.) in Damascus Governorate during 2010 and 2011
growing seasons to estimate heterosis and combining ability components for the n
umber of
rows per ear, number of kernels per ear, ear length (cm), ear diameter(cm), 100-kernel
weight (g), and grain yield (ton /hec).
The inbred lines, crosses, general combining ability (GCA) and specific combining
ability (SCA) mean squares were highly significant for all the studied traits, showing the
existence of a genetic variance among lines.
The ratios of GCA to SCA detected for the studied traits showed the dominance of an
additive gene action for all the studied traits except for 100-kernel weight and grain yield
which showed the predominance of a non-additive gene action.
The heterosis percentage for the studied traits was significant based on mid and
better parents.
The GCA effects showed that the lines CML.317, CML.371, CML.373 and
CML.367 were good general combiners for grain yield, while the SCA effects showed that
seven hybrids were the best F1 cross combinations such as (CML.317×CML.371) for grain
yield.
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