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)