Tag Archives: Correlation coefficient

Irrigation Scheduling of Maize Crop Under Different Levels of Sprinkler Irrigation and the Correlation with Some Productivity Traits

Ali Kinjo(1) Jamil Abbas(1) Rabee Zaina(2) andNeveen Hassoun*(1)

(1). Soil and Water Department, Faculty of Agriculture, Tishreen University, Lattakia, Syria.                                                                                                                  

(2). Latakia Research Center, General Authority for Scientific Agricultural Research GCSAR, Damascus, Syria.

(*Corresponding author: Eng. Neveen Hassoun. E.Mail: nevenhassoon80@gmail.com).

Received: 14/05/2019                                Accepted: 04/07/2019

Abstract

The research was conducted at Sit Kheris Agricultural Station in Latakia Agriculture Center, General Commission for Scientific Agricultural Research (GCSAR) in Syria, during the season 2018. The maize variety (Gasper) was used. Three levels of irrigation were applied (70, 80 and 90%) of the total water requirements of plant in addition to the control (100%). The experiment was executed according to Randomized Complete Block Design (RCED) with three replicates. Evapotranspiration values (ETo) were calculated by (Eto calculator ) program and the evaporation values of Class A Basin which were periodically taken in order to study the efficiency of water use efficiency, water  consumption and scheduling crop irrigation, in addition to the study of correlation and regression of productivity, and the most important components of maize variety under the conditions of the Syrian coast. The results showed a positive and strong correlation between ETo values ​​calculated using ETo calculator program and evaporation ETo values that were calculated by Class A basin (r = 0.975). The largest quantity of the total consumption of water was at flowering stage where it ranged between 619.92 m3/ha at the level of (70%) to 885.69 m3/ha at (100%), while the lowest was at the seedling stage where it ranged between 103.32 m3/ha at the level of (70%) to 147.69 m3/ha at (100%). The results also showed that there was a positive correlation between the productivity of the individual plant with the weight of 100 grains (r = 0.963 **) and moderate positive correlation with single leaf area (r=0.605), leaf area (r=0.603*), harvesting index (r = 0.537), and ear length (r = 0.489). The regression showed that applied irrigation program can increase the weight of 100 grains which will lead to an increase in the individual productivity of plant by 92%.

Key words: Irrigation scheduling, Evapotranspiration, Maize, Correlation coefficient, Regression coefficient.

Full Paper in Arabic: PDF

Variance, Heritability, Genetic Advance and Correlation of Some Phenological, Morphological and Productivity Traits in Some Safflower (Carthamus tinctorius L.) Genotypes

Mohammad Nael Khattab*(1)

(1). Crops Department, Faculty of Agriculture, Tishreen University, Latakia, Syria.

(*Corresponding author: Dr. Mohammad Nael Khattab. E-Mail:

Received: 11/03/2018                                Accepted: 06/10/2018

Abstract

In this study some of the phenological, morphological and productivity characteristics of six safflower (Carthamus tinctorius L.) genotypes (local, Thick orange 480 ،Acar 6، Syrian-1,  Gila and Son 11), were assessed using some genetic indicators (genetic and phenotypic variances, genotypic and phenotypic correlation coefficients, broad- sense heritability and genetic advance between seeds yield and its components) at  Dmsrkho site in Latakia governorate, during two seasons (2014/2015) and (2015/2016). Completely Randomized Design (CRD) was used with three replicates, to detect the genetic potentiality to be exploited to a maximum extent therefor, to determine the appropriate selectorial indices to improve safflower crop. Analysis of variance indicated that the genotypes differed significantly (P<0.05) for all studied characters, moreover, years effect and genotype by years interaction were significant for all studied traits. The values of mean and range revealed that there is wide variability among genotypes for most of the characters. The biological yield per plant, seed yield per plant, number of seeds per capitulum, number of capitulum per plant, number of branches per plant and harvest index exhibited wide range and high PCV and GCV giving an opportunity for improvement through election. Besides, these characters also had narrow differences between the values of PCV and GCV showing least influence of environment. High heritability coupled with high genetic advance observed for seed yield per plant, biological yield per plant, 100 seed weight, plant height and number of seeds per capitulum indicated that these traits are governed by additive gene action. Hence, there are good chances of improvement of these traits through direct selection. The highest phenotypic correlations were observed between seed yield with some traits such as: biological yield/plant and No. of capitula/plant, thus these traits, may be used for selecting high yielding genotypes.

Keywords: Safflower, Heritability, Genetic advance, Genetic variance, Phenotypic variance, Correlation coefficient.

Full paper in English: PDF

Variance, Heritability, Genetic Advance and Correlation Coefficient of Some Phenological, Morphological and Productivity Traits in Some Lentils (Lens culinaris M.) Genotypes

Mohammad Nael Khattab*(1)

(1). Crops Field Department, Faculty of Agriculture, Tishreen University, Latakia, Syria.

(*Corresponding author: Dr. Mohammad Nael Khattab. E-Mail: aboalabd876@gmail.com).

Received: 20/09/2017                              Accepted: 08/11/2017

Abstract
The phenological, morphological and productivity characteristics of six lentil genotypes (Idlib 1, Idlib 2, Idlib 3, Idlib 4, Balade and Kurdi) were assessed, using some genetic indicators (genetic and phenotypic variance, genotypic and phenotypic correlation coefficients, broad- sense heritability, and the genetic advance between seeds yield and its components at Dmsrkho area, in Latakia during two seasons (2014/2015) and (2015/2016). Randomized complete block design with three replicates was used, in order to investigate as much as possible, the genetic power of the genotypes to exploit them to the fullest extent and determine the appropriate selectorial evidence to improve lentils crop. Analysis of variance indicated that the genotypes differ significantly (P<0.05) for all studied characters. Moreover, years, genotype and years by genotypes interaction were significant for all studied traits. Phenotypic coefficient of variation was slightly higher than genetic coefficient of variation, and heritability values were high for most traits, this indicates the dominance of genetic factors and the low impact of environmental factors. Seed yield/plant (g) had a significant, positive genotypic and phenotypic correlation on number of pods/plant (rg=0.905** and rph=0.907**), while hundred seed weight (rg=0.294** and rph=0.294**) and biological yield (rg=0.76** and rph=0.78**). Biological yield had significant positive genotypic and phenotypic correlation with hundred seed weight (rg=0.62* and rph=0.59*) and seed yield (rg=0.93* and rph=0.95**). This indicates the possibility of selection for the biological yield through the selection of hundred seed weight and seed yield.

Keywords: Lentil, Heritability, Genetic advance, Genetic variance, Phenotypic variance, Correlation coefficient.

Full paper in English: PDF

Path Coefficient and Correlation of Some Morphological and Yield Components Traits in Maize (Zea mays L.)

Razzan Al Najjar*(1) Saoud Shehab(1) Ghassan Al Lahham(1) Ali Wannous(1)  Sameer Al Ahmad(1) and Thamer Al Henish(1)

(1). Crops Research Administration, General Commission for Scientific Agricultural Research (GCSAR), Damascus, Syria.

(*Corresponding author: Dr. Razzan Al Najjar. E-Mail: razanhamoda2009@gmail.com)

Received: 26/08/ 2015                                     Accepted: 18/09/ 2015

Abstract

The study carried out at Corn Research Department, General Commission for Scientific Agricultural Research, Damascus/Syria, during seasons 2011 and 2012, in order to estimate the correlation, and path coefficients of some yield components and morphological traits i.e. number of rows per ear, ear length and ear diameter (cm), number of grains per ear, 100 grain weight (g), grain yield of individual plant (g), plant height, and ear height(cm). In this study SH maize families were used, which are improved by the National Program in Syria. The experiment was conducted using randomized complete block design (RCBD), with three replications. The results showed a high significant positive correlation between grain yield of the individual plant, and each of plant height (r=0.879 **) ear length, height, and diameter (r=0.587 **, 0.818 **, 0.873 **) respectively, and number of grain per ear (r=0.863 **) and 100 grain weight (r=0.700 **), and number of rows per ear (r=0.798 **). According to that, those traits are considered selection criteria to improve grain yield in maize. The study of path analysis revealed that each of ear diameter, number of grain per row, and ear height, are the most studied traits that contribute of grain yield of individual plant (% 92.2), and thus they could be adopted as a selection criterion, in improving grain yield of maize crop.

Key word: Correlation coefficient, Path coefficient, Individual plant grain yield, Maize.

Full paper in Arabic:

معامل المسار والارتباط لبعض الصفات الشكيلة ومكونات الغلة الحبية في الذرة الصفراء (.Zea mays L)

Estimation of Some Selection Indices in Summer Squash (Cucurbita pepo L.)

Abd Al Mohsen Khalil Marie(1)

(1). Horticulture Research Administration, General Commission for Scientific Agricultural Research (GCSAR), Damascus, Syria.

(Corresponding author: Dr. Abd Al Mohsen Khalil Marie.
E-Mail : abdmmurie@yahoo.com).

Received: 07/09/ 2015                                     Accepted: 29/11/ 2015

Abstract

An experiment was carried out at Altyba Research Station, General Commission for Scientific Agricultural Research (GCSAR), Syria, during 2007and 2008 seasons, in randomized complete block design (RCBD) with three replications. Phenotypic correlation and path analysis of 16 agronomic characters were studied for 36 F1 hybrids and their 9 parents of summer squash (Cucurbit apepo L.), to estimate some selection indices. The results showed high significant positive correlation between  plant yield and fruit number per plant, female flowers% and average fruit weight (r=0.875**, 0.591**, 0.416**), respectively. While high significant negative correlation was detected between plant yield and days and nods number to first female flower (r=-0.417**.-0.440**) respectively. The path analysis revealed that number of fruits/plant had maximum direct effect (0.8540) on plant yield, followed by average fruit weight (0.3590). Female flowers% had the greatest indirect effect on plant yield, indicating these characters can be used as selection indices for yield improvement of summer squash.

Key words: Correlation coefficient, Path analysis, Yield, Selection indices, Summer squash.

Full paper in Arabic:

تقدير بعض الأدلة الانتخابية في قرع الكوسا(.Cucurbita pepo L)

Correlation and Path Coefficients Analysis between Yield Components in some Wheat Genotypes

Nabeel Awad Hassan(1) Maysoun Saleh*(2) and Nader Ibraheem Alkaraki(1) 

(1). Izraa Research Station, Agricultural Research Center in Daraa, General Commission for Scientific Agricultural Research (GCSAR), Daraa, Syria.
(2). Genetic Resources Department, GCSAR, Damascus, Syria.

(*Corresponding author: Dr. Maysoun Saleh. E-Mail: mzainsamasaleh@gmail.com).

Received: 15/06/ 2015                                     Accepted: 24/07/ 2015

Abstract

The study was conducted at Izraa Research Station, General Commission for Scientific Agricultural Research (GCSAR), Syria, during 2012/2013 season. Eight genotypes (3genotypes belongs to the species Triticum. carthlicum, 2 genotypes belongs to the species Triticum. polonicum , 3genotypes belongs to the species Triticum. dicoccum, and tow local checks sham3 and sham5, which were planted in Randomized Complete Block Design RCBD with three replications. Correlations and path coefficient analysis between yield components (number of total and fertile tillers, number and weight of grains per spike, thousand grain weight, individual plant yield) were studied. Results showed that grain yield had a positive significant correlation with both of number of total and fertile tillers (0.849**,0.932**) respectively, but number of total tillers had a positive significant correlation with number of fertile tillers (0.926**), while negative significant correlation was noticed with the number of grains per spike. The correlation was positive and significant between weight of grains per spike and with both of number of grains per spike and thousand grain weight. The results of path coefficient analysis showed that the indirect effect of number of total tillers on grain yield through the fertile tillers was positive and high (0.850), and was very close to the direct effect of the number of fertile tillers on grain yield (0.918), and the direct effect of grain weight per spike on grain yield was positive (0.322), and it’s indirect effect was negative and medium through the number of fertile tillers, and the indirect effect of thousand grain weight on grain yield was positive and medium through the weight of grain per spike (0.213). This study recommends to pay attention to the number of fertile tillers and grain weight per spike as a selection index of grain yield in the breeding programs, because of their high correlations an direct effect on yield.

Key Words: Wheat, Yield components, Correlation coefficient, Path coefficient analysis.

Full paper in Arabic: دراسة الارتباط وتحليل المسار بين مكونات الغلة لدى بعض الطرز من القمح

Performance of Some Primitive Wheat Genotypes and Correlation coefficient of Some Yield Components Under Rainfed Condition in Syria

Maysoun Muhammad saleh*(1) and Dyab Salem Moussa(2)

(1). Genetic Resources Department, General Commission for Scientific Agricultural Research (GCSAR), Damascus, Syria.
(2). Scientific Agricultural Research Center of Al-Ghab, (GCSAR), Hama, Syria.

(*Corresponding author: Dr. Maysoun Muhammad Saleh, Genetic Resources Department, (GCSAR), Damascus, Syria. Mobile phone: +963 0999312298).

Received: 19/04/2015                                      Accepted: 14/05/2015

Abstract

The study was conducted at Al-Ghab Research Centre, General Commission for Scientific Agricultural Research (GCSAR), Hama, Syria, during two growing seasons 2012/2013 and 2013/2014. Eight primitive wheat genotypes; C49, C57,and C64 belongs to Ttiticum carthlicum; P149,and P193 belongs to Ttiticum polonicum; D94, D124,  and D67 belongs to Ttiticum dicoccom, and two local cultivated varieties sham3, and sham5 (as control) were planted in randomized complete block design in three replications. Yield components (number of fertile tillers, number and weight of grains per spike and weight of thousand grain) were studied and compared to the  control and also the correlation coefficient  between the studied traits was determined. Results showed that the genotype D94 was significantly superior in number of fertile tillers comparing to both controls, and the genotype P194 was significantly superior in weight of grains per spike with an increase rate (76.65, 97.99)% as compared with both controls, sham3, and sham5, respectively, and also was significantly superior in weight of thousand grain with  an increase rate (72.73, 107.28)% as compared with both controls; sham3, and sham5 respectively. The results also showed a positive correlation between number of grains per spike and with each of weight of grains per spike and weight of thousand grain.

Key Words: Genotypes, Primitive wheat, Yield components, Correlation coefficient.

Full paper in Arabic: سلوك عدة طرز من القمح المبدئي ومعامل الارتباط لبعض مكونات الغلة ضمن ظروف الزراعة المطرية في سورية