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Register a new userGenetic Analysis of Some Yield Components in Half Diallel Sweet Corn Crosses
التحليل الوراثي لبعض عناصر الغلة في هجن نصف تبادلية من الذرة السكرية
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Tishreen University ورقة بحثية
Publication date
2013
fields
Field Crops
and research's language is
العربية
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أجري التهجين نصف التبادلي بين ست سلالات مرباة داخلياً من الذرة السكرية خلال صيف 2010 في مركز البحوث العلمية الزراعية باللاذقية, محطة بحوث صنوبر جبلة, و زرعت السلالات الأبوية و هجن الجيل الأول في موسم 2011 بهدف دراسة ظاهرة قوة الهجين و القدرة على التوافق لكل من صفة ارتفاع النبات, ارتفاع العرنوس, قطر العرنوس, عدد الصفوف بالعرنوس و إنتاجية النبات الفردي من العرانيس الخضراء. أبدت غالبية الهجن لصفة إنتاجية النبات الفردي قوة هجين موجبة و عالية المعنوية قياساً بمنوسط الأبوين و الأب الأفضل, و كان أفضلها 198.70%,176.81% للهجين (L4xL6) و 196.94%, 168.56% للهجين (L3xL4) و ذلك قياساً لمتوسط الأبوين و الأب الأفضل على التتالي. أشارت النسبة ما بين تباين القدرة العامة و الخاصة على التوافق σ2GCA/σ2SCA التي كانت أقل من الواحد, إلى أهمية نسبية للفعل الوراثي اللاإضافي مقارنة بالفعل الوراثي الإضافي في وراثة جميع الصفات عدا صفتي ارتفاع النبات و ارتفاع العرنوس, و أظهرت السلالتين L3(17.061),L4 (12.011) قدرة عامة جيدة على التوافق لصفة الغلة, كما أظهرت عدة هجن قدرة خاصة جيدة على التوافق لصفة إنتاجية النبات الفردي كان أفضلها الهجين L3xL5 (50.173).
A half diallel set of crosses among six inbred lines of sweet corn was evaluated to study heterosis and combining ability among plant height, ear height, ear diameter, number of rows per ear and ear yield per plant. The study was carried out at the agricultural research center in, GCSAR, Lattakia, Snoubar Jableh, during the 2010, 2011 seasons. Result showed that almost all crosses expressed a significant positive heterosis effect for ear yield per plant relative to mid parents and better parents; whereas, the highest positive significant percentage of heterosis for ear yield per plant were expressed by the crosses (L4xL6) which gave (198.70%, 176.81%) and (L4xL6) which gave (196.94%, 168.56%), over mid parents and better parents, respectively. The ratio (σ2GCA/σ2SCA) which was less than (1) showed that the non-additive gene action was more important than the additive gene action in all traits except plant height and ear height. The inbred lines L3 (17.061) and L4 (12.011) seemed to be the best general combiners for ear yield. Also, based on SCA effects, many of single crosses were identified as superior for ear yield, and the best hybrid was L3xL5(50.173).
References used
ABDELSATTAR, A. A; A. A. El-HOSARY and M. H. MOTAWEA. Genetic analysis of maize grain yield and its components by diallel crossing. Minufiya. J, Agri.Res. 24(1), 1999, 43-63
Al-AHMAD, A. S. Studies on some hybrids and strains of yellow maize. M.Sc.Thesis.Fac. of Agric. Ain Shams Univ. Egypt, 2001
Al-AHMAD. A. S. Genetic parameters for yield and its components in some new yellow maize crosses. Ph. D. Thesis.Fac. of Agric. Ain Shams Univ. Egypt, 2004
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This research was carried out at the Maize Researches Department of
General Commission of Science Agriculture Research (GCSAR), Damascus,
Syria, During the growing season 2010 to study general and specific combining
ability and the behavior of the
inheritance of plant height, ear height, yield per
unit area, ear length and ear diameter in sweet corn by the use of half diallel
crosses of five selected sweet corn inbred lines (IL.1037-08) P1, (IL.1062-08) P2,
(IL.1049-08) P3, (IL.209-08) P4 and (IL.1065-08) P5
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.
A half diallel making design was used to determine combining ability and heterosis of six
chickpea lines and their hybrid combinations with R.C.B.D. in three replication for seed
yield per plant, number of pods per branch, pods number per plant, fi
rst pod height and
100- seed weight, during 2015 and 2016 seasons, at the research Center of Al-Gab
(G.C.S.A.R). Genotypes, general (GCA) and specific (SCA) combining ability mean
squares were significant for all studied traits. The ratio σ2
GCA / σ2
SCA were detected for all
traits and showed that non- additive gene action was more important than additive gene
action in controlling all studied traits. GCA effects showed that the lines P2(IL.10158) was
good general combiner for number of pods per branch and plant, also, 100- seed weight
where, P3 (IL.5883) and P4(IL.4) were good general combiner for first pod height and seed
yield per plant, respectively. SCA effects showed that(P1×P2) hybrid was the best F1
crosses combination for seed yield per plant. On the other side (P1×P2), (P1×P4) and
(P2×P4) were showed positive and significant heterosis values for seed yield per plant and
100- seed weight also first pod height and number of pod per branch and plant
respectively.
This research was conducted at the Maize Research Department (Kharaboo) of
General Commission of Science Agriculture Research (GCSAR), Damascus, Syria,
during the growing seasons of 2009, 2010 ad, 2011 to study the genetic behavior of days
to 50%
silking, plant height, ear length, 100 grains weight and yield per plant by using
generation mean analysis (GMA) of two individual hybrids of maize, to estimate the
heritability, Phenotypic (PCV), and genotypic (GCV) coefficient variations and the
genetic advance.
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.
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