Abstract:
:Our major goal in this study was to establish and characterize an efficient callus induction and shoot regeneration protocol for cauliflower (Brassica oleracea var. botrytis). The effects of induction medium, growth regulator combination, organic component, AgNO(3), genotype and explants type on shoot differentiation on the cauliflower regeneration process were taken in account and hereby evaluated. The optimal media for shoot differentiation and rooting were modified MS medium (MS with PG-96 organic components) supplemented with NAA at 0.5 mg l(-1), TDZ at 0.25 mg l(-1), BA at 3.0 mg l(-1), AgNO(3) at 2.0 mg l(-1) and MS supplemented with IBA at 0.4 mg l(-1), respectively. Among the four varieties tested, Saixue gave the best shoot differentiation response (average over 18 shoots per explant) from the upper section of the hypocotyls. We have so far obtained over 500 regenerated plants under this improved protocol. We have further analyzed the somaclonal variation of regenerated plants at the DNA level by using the RAPD molecular markers. By PCR amplification, we were able to amplify 75 scoreable bands from 15 primers out of 40 arbitrary primers screened, where 35 of them were monomorphic and 40 polymorphic bands (53.3%) in four varieties studied. The absence of polymorphism among regenerated plants from the same variety indicated the conformity of the regeneration protocol.
journal_name
Hereditasjournal_title
Hereditasauthors
Qin Y,Gao LH,Pulli S,Guo YDdoi
10.1111/j.2006.0018-0661.01944.xsubject
Has Abstractpub_date
2006-12-01 00:00:00pages
91-8issue
2006eissn
0018-0661issn
1601-5223pii
HRD1944journal_volume
143pub_type
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