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Paper Information

Journal:   JOURNAL OF AGRICULTURAL SCIENCE (UNIVERSITY OF TABRIZ)   2006 , Volume 15 , Number 4; Page(s) 211 To 225.
 
Paper: 

EVALUATION OF YIELD AND RELATIONSHIPS BETWEEN SOME CHARACTERISTICS OF ONION (ALLIUM CEPA L.) IN NINE IRANIAN LANDRACES

 
 
Author(s):  RAFIPOUR M.*, MASIHA S., MOTALEBI AZAR A.R., MOBLI M.
 
* DEPARTMENT OF HORTICULTURAL SCIENCE, FACULTY OF AGRICULTURE, UNIVERSITY OF TABRIZ, TABRIZ, IRAN
 
Abstract: 

In order to study physiological characteristics and onion yield of nine onion landraces collected from different regions of Iran (including Sefid-e-Ghom, Sefid-e-Kashan, Germes-e-Azarshahr, Dorcheh-e-Isfahan, Tarom, Germez-e-Kazeroon, Kavar, Sefid-e-Abarkooh and Horand) and one foreign cultivar (Yellow Sweet Spanish)together with the populations obtained from mass selection within each landrace (except Horand) and the foreign cultivar, an experiment was conducted with 19 treatments and four replications using randomized complete block design, in 2000 at the Research Field of the College of Agriculture, Isfahan University of Technology. Results showed that selection had no significant effect on bulb yield and infected impure, thick-neck (onions with thick and solid neck) and double bulbs. Significant differences (variation) were observed among genotypes for most of the measured characters. Among collected landraces, Kavar was earlier and Tarom was later in bulbing time. Yellow Sweet Spanish and Tarom showed the highest and lowest bulbing ratio, respectively. Kavar and Tarom had the lowest and highest percentage of thick-neck bulbs, respectively. Germes-e-Kazeroon showed the highest yield, but was not significantly different from Sefid-e-Ghom, Germez-e-Azarshahr, Sefid-e-Abarkooh and Yellow Sweet Spanish. Yellow Sweet Spanish and Sefid-e-Ghom had the lowest and highest percentage of double bulbs, respectively. Bulbing ratio had a negative correlation with the number of days to onset of bulbing, the number of leaves per plant and plant height. A positive correlation between bulb yield and plant fresh weight was observed as well. Based on cluster analysis, collected landraces were classified in three groups. Combined analysis for the three-year data (due to availability of the data from two previous years) showed that the highest bulb yield belonged to Sefid-e-Abarkooh. Yield stability of this landrace was also higher than other landraces.

 
Keyword(s): BULB PRODUCTION, CORRELATION BETWEEN TRAITS, GENOTYPE, LANDRACE, ONION (ALLIUM CEPA), YIELD
 
References: 
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