Vol. 6, Issue 6 (2017)
Strategies for the development of unique flower forms in ornamental crops: A review
Author(s): Abhay Kumar Gaurav and Roshni Agnihotri
Abstract: Ornamental plants play a crucial role in human’s day to day life because of its aesthetic value. Any uniqueness in its forms is always welcome. Phenotype with unique forms of flower or, the double flower has higher ornamental value than the single one. Key transcriptional factors for the identification of floral organs have been identified and new ABCDE model has been proposed based on original ABC model. Here A+E specifying sepals, A+B + E petals, B+C+E stamens, C+E carpels, and D+E ovules. Different strategies are being applied like hybridization, mutation, polyploidy, genetic engineering etc to bred cultivars with new flower forms. Single, semi-double & double types of flower are genetically controlled either by a single gene or multiple genes hence by selecting suitable hybridization method double flower can be bred. Similarly, by induced mutagenesis, the mutant can be easily selected with modified visible characters, as flower color, shape, and size, or leaf form and growth habit. In polyploidy breeding, doubling the chromosome number whose main consequences are, increase in size and shape of plants/leaves/ branches, flower parts etc. With the advancement in biotechnological tools like RNAi, CRES-T, miRNA, various traits viz, flower color, fragrance, abiotic stress resistance, disease resistance, pest resistance, manipulation of the form and architecture of plants and/or flowers, flowering time, and post-harvest life etc are being manipulation by genetic engineering. These techniques have been successfully utilized to modify the shape of torenia, chrysanthemum, morning glory, petunia, orchids, gentian, cyclamen, rose plant etc. Even though there are many techniques available but, very few varieties have been developed for the commercial purpose.
How to cite this article:
Abhay Kumar Gaurav and Roshni Agnihotri. Strategies for the development of unique flower forms in ornamental crops: A review. Journal of Pharmacognosy and Phytochemistry. 2017; 6(6): 2474-2478.