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Production of autotetraploid plants by in vitro chromosome engineering in Allium hirtifolium

Horticultural Plant Journal(园艺学报:英文版) 2023年第5期9卷 986-998页

作者： nasrin farhadi Jaber Panahandeh Alireza Motallebi-Azar Sam Mokhtarzadeh Department of Horticultural Science Faculty of AgricultureUniversity of TabrizTabriz 51666-14766Iran Field Crops Department Faculty of AgricultureUniversity of DuzceDuzce 81620Turkey

Persian shallot has been propagated vegetatively through daughter bulbs and has a narrow genetic *** the present study,to create genetic diversity in terms of ploidy level,the effects of in vitro polyploidization were investigated on morphological,physiological and phytochemical *** colchicine treatments(0,0.3%,0.5% and 0.7% concentrations)for 24,36 and 48 h and oryzalin treatments(0,0.001%,0.002% and 0.004% concentrations)for 4,6 and 8 h were used.A sterile basal plate of bulbs was used for the induction of polyploidy in liquid and solid *** obtaining plantlets,root tip chromosomes were counted for the determination of ploidy *** cytometry was performed to confirm the chromosome counting *** regenerated diploid and tetraploid plantlets were transferred to ex vitro *** and oryzalin were both successful in inducing polyploids and the polyploids induced were tetraploids and *** highest induction of polyploidy was obtained in solid media using 0.5%(w/v)colchicine for 36 h(35.0% polyploidy induction)and in 0.001%(w/v)Oryzalin for 8 h(45.5% polyploidy induction).Differences in plantlet height and weight,bulblet weight,density,stomatal width and length,and chlorophyll content were observed between tetraploid and diploid *** duplication,as a result of tetraploid induction,significantly influenced the antioxidant content and enzyme *** results showed that total phenolic content,allicin,and antioxidant capacity were significantly higher in the tetraploid plantlets than that in the diploid *** loci polymorphisms indicated that the 12 autotetraploid plants(with high allicin content)had different genotypes from the parental diploid ***,in vitro polyploidy induction not only duplicated chromosomes but also altered the DNA sequence in Allium *** vitro induction of tetraploids in *** can be a reliable way to obtain suitable plant material for bre

关键词： Persian shallot Allium hirtifolium Polyploidy Colchicine Oryzalin Molecular marker

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