Category Archives: vol3-no2

Diagnosis of Subclinical Mastitis in Awassi Ewes

Abd Al-Naser Al-Omar*(1) Azzam Kurdi(2) Mohamad Rokbi(3) Sameer Al-Shareey(1) Abd Al-Fattah Hamada(4)

 (1). Agricultural Research Center in Hama, General Commission for Scientific and Agricultural Research (GCSAR), Hama, Syria.
(2). Faculty of Veterinary, Hama University, Hama, Syria.
(3). Agricultural Research Center in Aleppo, GCSAR, Aleppo, Syria.
(4). Avico company for medical manufacturer, Hama, Syria.

(*Corresponding author: Dr. Abd Al-Naser Al-Omar. E-mail: abdnaser64@gmail.com).

Received: 04/08/ 2015                                     Accepted: 16/09/ 2015

Abstract

This research was conducted at Jidrine Research Station, General commission for Scientific Agricultural Research (GCSAR), Hama/Syria. A total of 244 milk samples out of 122 ewes were collected and subjected to California mastitis test (CMT), somatic cell count test (SCC), bacterial plantation test, and sensitivity test for antibiotics. Ewes that gave positive results to California mastitis test were treated with the appropriate antibiotic according to bacterial analysis and subsequently sensitive reactions. The prevalence rates of subclinical mastitis based on CMT and somatic cell count (SCC) were 38.98% and 35.24%, respectively. The sensitivity of California mastitis test was 91.4% (64/86). Chi-square test using SAS program showed significant differences(<0.0005) in relation to somatic cell count between normal and infected milk samples with subclinical mastitis, but insignificant differences were detected in relation to California mastitis test between manual, and machine milking. The relative risk estimation revealed that the infection with subclinical mastitis in manual milking is more than machine milking in 2.2 times (p<0.0041), whereas the compatibility between the variables of the independent groups showed high compatibility (k=0.7887) between the two diagnostic test, California mastitis and bacterial test. Chi-square showed significant differences (p<0.0001) between the bacterial isolations that cause subclinical mastitis infection. The most important 64 bacterial isolations were taphylococcus aureus (46.87%), Pasteurella  haemolytica (21.87%), E.coli (17.18%) and Klebsiella (4.68%). All cases of subclinical mastitis infections were cured using effective antibiotics according to sensitivity tests, this requires an early detection and treatment of subclinical mastitis cases in infected ewes, in addition to  improve environmental conditions in Awassi ewes breeding places.

Key-words: Sub-clinical mastitis, Awassi ewes.

Full paper in Arabic:تشخيص التهاب الضرع تحت السريري في النعاج العواس

A study of Phenotypic Correlation and Path Coefficients of Fruit Firmness and Some Correlated Traits in Tomato (Lycopersicom esculentum Mill.) Hybrids

Ali Izzo*(1) Hassan khojah(2) and Sohil Makhol(3)

(1). AL-Jmmaseh Research Station, Scientific Agricultural Researches Center of Tartous, General Commission for Scientific Agricultural Research (GCSAR), Tartous, Syria.
(2). Horticulture Department, Faculty of Agriculture, Tishreen University, Latakia, Syria.
(3). Higher Commission for Scientific Research (HCSR), Damascus, Syria.

(*Corresponding author: Eng. Ali Izzo. E-mail: izzo198899@gmail.com , Mobile: +963 0966275436).

Received: 20/10/ 2015                                     Accepted: 12/11/ 2015

Abstract

The research was conducted at Al-Jmmaseh Station, Agricultural Research Center in Tartous, Syria, during 2014 season, to study the phenotypic correlation and path coefficient of pericarp thickness (mm), firmness (Kg/cm3), total soluble solids (%), yield per plant (Kg/plant), number of locales per fruit, fruit diameter (cm), and fruit length (cm). Fifteen hybrids and their parents were evaluated with three replications using RCBD design. The results of phenotypic correlation values showed that fruit firmness was positively and significantly correlated with total soluble solids (r=0.319*) and pericarp thickness (r=0.779**), but it was negatively and significantly correlated with yield per plant (r=-0.492**), fruit length (r=-0.439**), fruit diameter (r=-0.685**) and number of locales per fruit (r=-0.649**). Path coefficient analysis showed that pericarp thickness was one of the most traits in contribution in firmness variation, therefore, it could be concluded that firmness improvement could be achieved by selection for pericarp thickness.

Key Words: Tomato, Phenotypic correlation and path coefficients.

Full paper in Arabic:

دراسة معاملي الارتباط المظهري والمرور لصفة صلابة الثمار وبعض الصفات المرتبطة بها في هجن من البندروة (.Lycopersicom esculentum Mill)

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)