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Register a new userتحديد الفعل الوراثي لبعض الصفات الكمية والنوعية ودوره في التحسين الوراثي في القمح القاسي
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Damascus University أطروحة دكتوراه
Publication date
2015
fields
Agricultural Engineering
and research's language is
العربية
Created by
Shamra Editor
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نفذت هذه الدراسة الحقلية بالتعاون بين كلية الزراعة في جامعة دمشق والهيئة العامة للبحوث العلمية الرزاعية في سورية
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References used
المجموعة الإحصائية الزراعية 2007 الصادرة عن وزارة الزراعة - مديرية الإحصاء والتخطيط دمشق سورية
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This study was carried out at Karahta station, Department of Field Ccrops
researches, General Commission for Scientific Agriculture Researches
(GCSAR), Damascus Country Side, Syria during the 2009-2010and 2010-2011
growing seasons to estimate gene
action for grain yield and its components.
Seeds of the durum wheat hybrid (Sham5 X Azgar1) were grown in three
replicates. Results indicated that the used genotypes had good variation to be
used as parents in wheat hybridization program to achieve significant genetic
advance. Mean square results showed significant differences among mean
values of the five populations for all studied traits in the hybrid and in most
traits, epistasis or dominance gene action occupied the first rank to the genetic
effects. It was suggested that selection for most studied traits in the subsequent
generations is relatively more effective than in early generations.
نفذت الدراسة في حقول قسم بحوث الذرة التابع للهيئة العامة للبحوث العلمية الزراعية في دمشق , سورية خلال الموسمين الزراعيين 2011 و2012 , حيث تم خلال الموسم الزراعي 2011 تكوين حبوب العشائر الست لأربعة هجن فردية من الذرة الصفراء وتم خلال موسم 2012 تقييم ا
لعشائر الست للهجن الأربعة في موعديين زراعيين 12-5 كموعد مبكر و12-6 كموعد متأخر .
Succes of a breeding program depends, to a great extent, on understanding
the gentic behavior of the traits. This investigation was conducted to study and
examine the inheritance of some economically important characters such as:
total bolls numbe
r, actual bolls number, ginning percentage , boll weight,
harvest index, flowering earliness, maturity earliness, plant height,and fiber
fineness.
This study was carried out at Karahta station of field crops research
department General Commission for Scientific Agriculture Researches
(G.C.S.A.R.) Damascus Syria during the 2009 -2010 and 2010 -2011 growing
seasons to estimate gene action, p
otency ratios, heterosis and Inbreeding
depressions. Five population seeds of two single hybrids (Cham-5 × Azeghar-1),
(Bohoth-5 × Gidara-2) were formed by crossing of four inbred lines. The
crosses were subjected to randomized complete block design (RCBD) with
three replications in order to evaluate plant height (PH), number of grains per
spike (GRSP), flag leaf area (FLA), thousand kernel weight (TKY) and grain
(p<0.05) yield per plant (GYP). Mean square results showed significant
differences among mean values of the five populations for all studied traits in
all crosses. Significant heterosis values compared to mid and better parent were
observed for all traits with exception of (PH) (5.82, 1.62)%, (GRSP) (27.49
9.66)% and(TKY) (3.05 7.53)% for Cross-1. (GYP) (82.46, 96.63)% for Cross-
2. (GRSP) (9.09 5.14)%. The potency ratios exceeded (+1) in all traits and
crosses except (PH) (-2.23) for Cross-2. Indicating that over-dominance
towards low placement. The results indicated that Inbreeding depression values
were significant for all traits in Cross-1 except for (GRSP) (10.33), and (TKY)
(15.23). While its values were non- significant for all traits inCross-2except
(GRSP) (25.46*). In most traits epestasis or dominant gene action occupied the
first rank in controlling these traits in both crosses. It could be suggested that
selection for most studied traits in the subsequent generations will be relatively
more effective than in early generations.
تقدير بعض المعايير الوراثية لأهم الصفات الإنتاجية ومكوناتها وأثرها في التحسين الوراثي للقمح القاسي(Triticum durum L )
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