Tag Archives: Path coefficient

Determination of Some Selection Indices in Wild Chickpea

Ghada Ahmad*(1) Maysoun Saleh(1) and Yousef Wjhani(1)

(1). Genetic Resources Department, General Commission for Scientific Agricultural Research (GCSAR), Damascus, Syria.

(*Corresponding author: Eng. Ghada Ahmad. E-Mail:  ghadaahmad245@gmail.com).

Received: 01/10/2018                                Accepted: 21/11/2018

Abstract

16 genotypes belong to eight wild annual genotypes of chickpea which represented the common species in west Asia and north Africa were planted in Dara’a Research Centre (Ezra Station), General Commission for Scientific Agricultural Researche (GCSAR) in addition to local chickpea (Cicer arietinum L.) during 2011/2012 season in Randomized Complete Block Design RCBD with three replications, in order to study the correlation between studied traits and to determine selection indices for chickpea grain yield via path analysis to figure out direct and indirect effects and to define their contribution% in grain yield. The studied traits were (days to maturity, flower peduncle height, plant height, pod number per plant, first pod height, grain number per plant, hundred grain weight and grain yield per plant). Results showed that grain yield had a positive significant correlation with each of pod number and grain number per plant and hundred grain weight (0.615**, 0.633**, 0.606**) respectively, and with flower peduncle height (0.514*), and had negative correlation with days to maturity (-0.412*). Results of path coefficient analysis showed that all studied traits contributed  in grain yield in a rate of 65.2%, and the direct effect for each of pod number per plant and hundred grain weight on grain yield were high and positive (0.8066, 0.5122) respectively, while high but negative for each of days to maturity and grain number per plant and medium and negative for the first pod height and low and negative for flower peduncle height (-0.1709). Results showed also that pod number per plant had  the highest contribution in grain yield as a direct effect 65.07)) %, followed by the indirect and cooperate effect of number pod per plant and hundred grain weight (39.38) % then the direct effect of hundred grain weight (26.23) %, so they could be considered as selection indices for grain yield in chickpea.

Key words: Contribution%, Correlation, Path coefficient, Grain yield, Wild chickpea.

Full Paper in Arabic: 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)