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Register a new userدراسة السلوكية الوراثية لصفة صلابة الثمار في هجن نصف تبادلية من البندورة ( Lycopersicom esculentum Mill )
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Tishreen University رسالة ماجستير
Publication date
2016
fields
Agricultural Engineering
and research's language is
العربية
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دراسة السلوكية الوراثية لصفة صلابة الثمار في هجن نصف تبادلية من البندورة ( Lycopersicom esculentum Mill )
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References used
حسن أحمد عبد المنعم 1991 أساسيات تربية النبات الدار العربية للنشر والتوزيع القاهرة
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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.
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.
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.
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 a
gricultural 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).
نفذ البحث خلال الموسمين المتتالين 2008و 2009 في محطة المريعية التابعة لمركز البحوث العلمية الزراعية بدير الزور
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