Induction of triploid Citrus plants from endosperm calli in vitro.
Identifieur interne : 001486 ( Ncbi/Curation ); précédent : 001485; suivant : 001487Induction of triploid Citrus plants from endosperm calli in vitro.
Auteurs : F G Gmitter [États-Unis] ; X B Ling ; X X DengSource :
- TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik [ 0040-5752 ] ; 1990.
Abstract
Triploid hybrid Citrus plants were regenerated by somatic embryogenesis in vitro from endosperm derived calli. A sequence of media formulations was used to induce and support proliferation of primary callus from endosperm, to induce embryogenesis from primary callus, and to allow embryo development leading to viable plantlets. Calli were induced from cellular endosperm of Citrus sinensis (sweet orange), C. Xparadisi (grapefruit), and C. grandis (pummelo) excised 12-14 weeks post-anthesis. Induction of embryogenesis from sweet orange and pummelo primary calli required gibberellic acid and double mineral nutrient concentrations. Embryogenesis was not induced from grapefruit calli in these experiments. Only sweet orange embryos developed sufficiently to allow plant regeneration. Triploid axillary buds were minigrafted onto etiolated diploid rootstock seedlings in vitro in order to transfer triploid regenerants to soil and the external environment. Triploidy (2n = 3x = 27) was observed consistently in all phases of regeneration and in recovered plants. These results demonstrate that triploid hybrid plant recovery from Citrus endosperm can overcome barriers to sexual hybridization resulting from apomixis.
DOI: 10.1007/BF00224192
PubMed: 24221109
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