Genetic Analysis of Some Yield Components in Half Diallel Sweet Corn Crosses

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).

Evaluation of some physiological parameters of several sorghum (Sorghumbicolor L. Moench) genotypes for water stress tolerance during the flowering stage

An experiment was conducted in Kharabo station which belongs to the faculty of agriculture, Damascus university during the growing season 2009 ! 2010, to evaluate the response of seventeen sorghum genotypes under water stress conditions during the flowering stage according to the randomized complete block design (RCBD), with three replicates.

The adult behavior of longhorn beetle Cerambyxdux F. (Cerambycidae, Coleoptera)

This research was aimed to study the behavior of adults of the Longhorn beetle, Cerambyx dux F. (Cerambycidae, Coleoptera) on apple tree. Results showed that the adults have a diurnal habit.The adults emerged from pupa was sexually matured, and fed only for survival.

التفاعل الوراثي البيئي و ثباتية الغلة لطرز و سلالات مبشرة من القمح القاسي في مواقع بيئية سورية متباينة

اختُبر 12 طرازا وراثياً من القمح القاسي Triticuum. du لصفة الغلة الحبيبة في ثلاثة مواقع بيئية متباينة خلال موسمي 2014/2013 ,2015 /2014 و تضمنت المادة الوراثية 7 سلالات مبشرة و خمسة شواهد تمثل أصناف القمح القاسي المحلية لمنطقتي الاستقرار الأولى و الثانية في سورية. صممت التجربة وفق تصميم القطاعات الكاملة العشوائية في ثلاثة مكررات, حللت البيانات و تمت المقارنة وفق اختبار أقل فرق معنوي LSD عند مستوى دلالة 5%.

Effect of Sowing Date and Nitrogen Fertilization on Several attributes of groundnut ( Arachis hypogae L. )

This search was conducted in Albassa town at Lattakia governorate , during 2011 and 2012 growing seasons for study effects of 3 sowing dates ( 15th of April , 25th of April and 5th of May ) and 4 levels of nitrogen fertilization ( N1: control , N2: 50 kg/ha , N3: 100 kg/ha , N4: 150 kg/ha ) on several attributes of groundnut (Coastal category) production . The results showed that the 5th of May sowing date had significant excel in the average of the two growing seasons in dry weight of pods in plant , wheight 100- Seeds, The per-hectare yield of seeds and Harvest index , It ranked first in the two seasons search. Also, The application of nitrogen fertilizer at a rate of 150 kg/ha had resulted in a significant increase in studied productivity traits in the average of the two growing seasons , Except for harvest index , which was at least as compared to other levels of fertilization. The interaction between the sowing date ( 5th of May ) and the level of nitrogen fertilization (150 kg/ha) showed a significant excel in the average of the two growing seasons in dry weight of pods in plant , wheight 100- Seeds and The per-hectare yield of seeds .

Estimation of General and Specific Combining Ability for strains and hybrids of maize (Zea mays) under industrial infection by large corn stem borer Sesamia cretica

The study was done at the field research station Sianow of General Commission for Scientific Agricultural Research at Lattakia, to evaluate the susceptibility of 6 strains of maize Zea mays. L, and fifteen maize crosses obtained by half Diallel cross, against under conditions Industrial infection by large corn stem borer , Sesamia cretica Led. The experience was designed at randomized complete blocks (R.C.B.D). Strain IL.257-09)P1( expressed general high capacity to the attributes of Number of kernels per row(3.089), number of holes (-1.261). Strain IL.298-09 (P2) also expressed general high capacity to the attributes of Ear length (0.717), Intensity of damage (-0.432),% of yield loss (-6.022). strain IL.286-09 (P3) general high capacity to the attributes of diameter Ear (0.292), number of rows per ear (2.806). Strains IL.255-09 )P4) )0.036( and IL.228-09)P5) (0.969) also expressed general high capacity to the attributes of grain yield. Strain IL.262- 09(P6) expressed general high capacity to the attributes of 100- Kernel weight (1.942), infestation grain yield) 0.784), tunnel length (-5.629), Percentage of dead hearts (-1.132).

The Effect of Planting Date on Some Indicators Yield of Plant Safflower (Carthamus tinctorius L.)

The research was Carried out in Jisr area in the province of Idlib during the growing season 2013 - 2014 to study the effect of planting dates in autumn sowing 28/9/2013 = (1), 8/10/2013 = (2), 18/10/2013 = (3) and spring sowing 18/3/2014 = (1), 28/3/2014 = (2), 8/4/2014 = (3) on yield and growth parameters. The results showed that the autumn sowing has a significant increase in growth parameters compared to spring sowing: adapting coefficient (76.67-82.28%), Plant hight (67.15 - 56.3 cm), number of branches/plant (11.63 - 6.84), number of head/Plant (21.39 - 17.76), oil content (23.19 - 20.68)%, yield petals (96.12 - 60.57) kg/ha, seed yield (1331.82 - 768.31) kg/ha, oil yields (315.15 - 158.99) kg/ha to autumn and spring, respectively. While maturity date of autumn plants was delayed compared to spring (245.33 - 145.33) Day. When sowing was of autumn, growth parameters of third soing date were a significantly higher compared to both the second and first sowing: number of branches / plant, number of heads / plant, number of seeds / head, oil ratio (%), oil yield (kg/ha), yields seeds ( kg/ha), petals yield (kg/ha). Wheras the first sowing date has delayed maturity date compared of both the second and third sowing dates. When sowing was in spring, growth parameters of the first sowing dates were a significantly higher compared to both the second and third except for days to maturity.

Effect of Phosphate Fertilizer and Plant Density On Some Productive and Quality Traits of Coriander Coriandrum sativum L.

The lack of information about the cultivation of coriander plant in Syria prompted us to study the effect of four plant densities (33.33،10، 13.33 and 20 plant/m2)، and four levels of phosphate fertilization (0107.2،160.8، and 214.4 of Superphosphate 46%) on some productive and quality traits of the coriander plant. This study was carried out in Tartous province during the growing season 2014، using Randomized Complete Block design with a Split Plot arrangement of treatments. The Results revealed that there were significant differences between the treatments for the whole traits، in addition to a significant interaction between density and phosphate fertilization. Although the densities (10، 13.33 and 20 plant/m2) varied in their effect، they had superiority upon the control(33،33)plant/m2، and the density 10 plant/m2 had more important effect in terms of increasing each of: branches number/plant، seed weight/plant، seeds number/inflorescence، protein content in plants and seeds and beta carotene and chlorophyll. However، the level 160.8k.g/h of P2O5 increased the number of inflorescences/plant، number of fruits/plant and seed weight/ inflorescence.

Heritability and Genetic Advance of Some Physiological and Productive Indicators in Many Cotton Genotypes

Seven cotton varieties (Rakka 5, Aleppo133, Aleppo 90, Aleppo 118, Aleppo 40, Deir 22, and Line124) were used in the study of some quantitative characteristics of cotton yield and its components (seed cotton weight per boll/g, 100seed/g weight average, lint percentage %, seed cotton weight per plant/g, total dry matter weight, seed cotton yield per unit area kg/ha), and physiological qualities (leaf area cm2, leaf area index %). The seven varieties were grown in Salhab (Al-Ghab region, Hama) in 2012 using randomized complete block design with three replications. The study included estimating variance, broad sense heritability, genetic progress, and genetic correlation between cotton yield and its components, which is to be used in breeding programs.

A study of the Genetic Behaviour of Some Yield Traits in Half Diallel Crosses of Maize (Zea mays L.)

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 number 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.