study on selection effects for dormancy in three Iranian onion landraces.
2008
Shah Mansuri, E`mad | Mortazavi Beyk, Ahmad | Pashnam, Rasul
In onion ( Allium cepa ) sprouting is one of the most important factors that cause storability loss . This phenomena can affected by cultivation practices , time of harvest , store condition and cultivar characteristics . The aim of this study was to comparation between the means of one selected generation and non -selected population for rate and percentage of sprouting and realized heritability estimate in three onion landraces ( Dorche , Azar shahr , Sephid Qum ) . Bulbs of the breeding materials were subdivided in to two classes consisting of high tolerance to sprouting and non -selected population . 100 bulbs of each class were isolated in screen cages and bulk seed harvested in the second year and were planted in five replications in the next year . The results showed positive response to selection in selected populations that decreased the percent and rate of sprouting after one generation of selection . Realized heritability estimates were 0.37 , 0.24 and 0.44 for non _ sprouting and 0.41 , 0.36 and 0.58 for rate of sprouting in three populations .
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