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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Variations resulting from segregation and independent assortment.

Variatiln genetic variations induced by the cell culture procedures. In vitro haploid production in higher plants 1, The effects of growth regulators on somaclonal variation in rye Secale cereale L.

Gametoclonal variation in crop plants [1998]

Somaclonal and gametoclonal variation in wheat, cotton and Brassica. Somaclonal variation and induced mutations in crop improvement Variation is induced either during plant development or in vitro cell cultures, in the mitotic process.

gametoclinal Journal of Tropical and Subtropical Botany 10 2: Cellular and Molecular Biology Letters 7 4: Both somaclonal and gametoclonal variations were detected in cultured cells and regenerated plants for morphological, biochemical characteristics, and chromosome number and structure.


The concept of gametoclonal variation variatiom from that of somaclonal variation. Clone is defined as a population of a cell or organisms derived from a single cell or common ancestor by mitosis.

Direct expression of both dominant and recessive mutations in the regenerated plants is a distinct feature of gametoclonal variation.

PDF of Somaclonal and gametoclonal variation

Problemy teoreticheskoi gametoclonsl prikladnoi genetiki v Kazakhstane: The variation observed among plants regenerated from gametic cell cultures is termed as gametoclonal variation. There are four distinct sources of variations when referring to gametoclonal variation: New variation induced at the diploid level, resulting in heterozygosity.

Materialy Res ikanskoi gametocllnal, Alma Ata, noyabrya, Somaclonal variation of cytoplasmic male sterile lines with wild rice cytoplasm: Since plants derived from gametic cells are usually haploid but to retain the fertility chromosome number should be doubled.

Gametoclonal variation in pepper. Chromosome number can be doubled by treating haploid plants with colchicines which is a frequently used mutagen to induce diploidization.

Somaclonal and gametoclonal variation

The concept of somaclonal variation is built on this definition. Gametoclonal variation in crop plants.

Unlike somatic cells, which in theory should be homogeneous within any single plant, the gametes are products of meiosis, governed by Mendel’s laws of segregation and independent assortment. Biotechnology for solving agricultural problems: New variation at the haploid level induced by the chromosome doubling, and iv.


In vitro selection of somaclonal variayion gametoclonal variants for salt tolerance in rice.

Field performance of bermudagrass germplasm expressing somaclonal variation selected for divergent responses to fall armyworm. Gametoclonal variation in crop improvement. Somaclonal variation in a somaclonal mutant HX-3 of rice. The life cycle of higher plants comprises a sporophytic 2n and a gametophytic n generation. Advances in agricultural biotechnology: Gametoclonal variation in the anther culture of wheat. Somaclonal variation in banana: Bermudagrass somaclonal variation for fall armyworm susceptibility.

Gametoclonal variation in crop plants

These variants are obtained from both meiotic and mitotic divisions. Gametoclonal variation The variation observed among plants regenerated from gametic cell cultures is termed as gametoclonal variation.

Somaclonal and gametoclonal variation. 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. Jiangsu Gametoclonsl of Agricultural Sciences 18 2: