Introduction. Plants generally exhibit cytogenetic and genetic variations which help the plant breeders in crop improvement. When such variants arise through. Request PDF on ResearchGate | Gametoclonal Variation in Crop Plants | Gametoclonal variation has been defined as the variation among. breeding strategies for the use of this variation are presented and discussed. Somaclonal and gametoclonal variation are new tools for the geneticist and plant .

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Problemy teoreticheskoi i prikladnoi genetiki v Kazakhstane: Somaclonal variation of cytoplasmic male sterile lines with wild rice cytoplasm: Advances in agricultural biotechnology: Since plants derived from gametic cells are usually haploid but to retain the fertility chromosome number should be doubled.

Somaclonal and gametoclonal variation. Gametoclonal variation in pepper.

PDF of Somaclonal and gametoclonal variation

Somaclonal and gametoclonal variation in wheat, cotton and Brassica. The variation observed among plants regenerated from gametic cell cultures is termed as gametoclonal variation. These variants are obtained from both meiotic and mitotic divisions.


Journal of Tropical and Subtropical Botany 10 2: New variation induced at the diploid level, resulting in heterozygosity. There are four distinct sources of variations when referring to gametoclonal variation: Bermudagrass somaclonal variation for fall armyworm susceptibility. The effects of growth regulators on somaclonal variation in varistion Secale cereale L.

In vitro selection of somaclonal and gametoclonal variants varaition salt tolerance in rice. Both somaclonal and gametoclonal variations were detected in cultured cells and regenerated plants for morphological, biochemical characteristics, and chromosome number and structure. Biotechnology for solving agricultural problems: Jiangsu Journal of Agricultural Sciences 18 2: Gametoclonal variation in the anther culture of wheat.

Gametoclonal variation in crop plants [1998]

Clone is defined as a population of a cell or organisms derived from a single cell or common ancestor by mitosis. Cellular and Molecular Biology Letters 7 4: Gametoclonal variation in crop improvement.

Variation is induced either during plant development or in vitro cell cultures, in the mitotic process. Materialy Res ikanskoi konferentsii, Alma Ata, noyabrya, Field performance of bermudagrass germplasm expressing somaclonal variation selected for divergent responses to fall armyworm.

The concept of somaclonal variation is built on this definition.


The concept of gametoclonal variation evolved from that of somaclonal variation. Chromosome number can be doubled by treating haploid plants with colchicines which is a frequently used mutagen to induce diploidization.

Direct expression of both dominant and recessive mutations in the regenerated plants is a distinct feature of gametoclonal variation. Gametoclonal variation in crop plants. Somaclonal variation and induced mutations in crop improvement For genetic reasons, it is necessary to distinguish between plants regenerated from somatic 2n, somaclones and gametic tissues n, gametoclonesand also between somaclonal and gametoclonal variation.

Gametoclonal variation The variation observed among plants regenerated from gametic cell cultures is termed as gametoclonal variation.

Somaclonal and gametoclonal variation

New genetic variations induced by the cell culture procedures. New variation at the haploid level induced by the chromosome doubling, and iv. Somaclonal variation in banana: