GENOTYPIC AND PHENOTYPIC PATH ANALYSIS IN SUNFLOWER (Helianthus Annuus L.)

Abstract: Two field experiments were conducted at each of Kafr-El-Hamam Agricultural Research Station during the summer seasons of 2011 and 2012, and at Tag-El-Aiz Agricultural Research Station during the Nile seasons of 2011 and 2012 to study the effect of three intra-row plant spacings (20, 25 and 30 cm between hills) on the oil yield and its components of eight sunflower genotypes. Also, the associations among oil yield components were studied using correlation coefficient and path analysis at the genotypic and phenotypic levels. The used experimental design was a split plot design with three replicates. The three plant spacings were assigned to the main plots while the sub plots were devoted to the tested genotypes. Results showed significant differences among sunflower genotypes and among plant spacing treatments, for all studied characters over locations and seasons. It is noted that increasing intra-row plant spacing to 30 cm between hills (low density) led to significant increments for all studied characters, except plant height. The elite genotype No 7 (L40) recorded the maximum values of head diameter, weight of 100 seeds, seed yield and oil yield. As a result of interaction, genotype No 7 (L40) produced the maximum values of head diameter, weight of 100 seeds, seed yield and oil yield when it was grown at 30 cm between hills. Highly significant and positive correlation coefficients were obtained between oil yield and each of plant height, head diameter, weight of 100 seeds and seed weight/plant at the genotypic and phenotypic levels. Path analysis (genotypic and phenotypic) showed that the traits i.e. seed weight/plant, seed oil percentage gave the maximum influence directly and indirectly upon oil yield indicating their magnitude as selection criteria to obtain a valuable gain of selection for oil yield in sunflower.
Publication year 2013
Organization Name
Author(s) from ARC
External authors (outside ARC)
    وائل محمد عادل خليل تعيلب قسم بحوث المحاصيل الزيتية- معهد بحوث المحاصيل الحقلية
Publication Type Researsh & Applied Activities
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