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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The concept of gametoclonal variation evolved from that of somaclonal variation. Gametoclonal variation in the anther culture of wheat. 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

Bermudagrass somaclonal variation for fall armyworm susceptibility. Both somaclonal and gametoclonal variations were detected in cultured cells and regenerated plants for morphological, biochemical characteristics, and chromosome number and structure. Cellular and Molecular Biology Letters 7 4: The variation observed among plants regenerated from gametic cell cultures is termed as gametoclonal variation.

Variation is induced either during plant development or in vitro vadiation cultures, in the mitotic process.


In vitro haploid production in higher plants 1, Since plants derived from gametic cells are usually haploid but to retain the fertility chromosome number should be doubled.

Problemy teoreticheskoi i prikladnoi genetiki v Kazakhstane: Variations resulting from segregation and independent assortment.

NPTEL :: Biotechnology – Plant Biotechnology

Journal tametoclonal Tropical and Subtropical Botany 10 2: Field performance of bermudagrass germplasm expressing somaclonal variation selected for divergent responses to fall armyworm. The life cycle of higher plants comprises a sporophytic 2n and a gametophytic n generation. New variation induced at the diploid level, resulting in heterozygosity.

Gametoclonal variation in crop plants. Advances in agricultural biotechnology: Somaclonal variation in banana: 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.

In vitro selection of somaclonal and gametoclonal variants for salt tolerance in rice. Chromosome number can be doubled by treating haploid plants with colchicines which is a frequently used mutagen to induce gametoclonl. These variants are obtained from both meiotic and mitotic divisions. Materialy Res ikanskoi konferentsii, Alma Ata, noyabrya, Somaclonal and gametoclonal variation in wheat, cotton and Brassica. The concept of somaclonal variation is built on this definition. The effects of growth regulators on somaclonal variation in agmetoclonal Secale cereale L.


Somaclonal variation in a somaclonal mutant HX-3 of rice. New genetic variations induced by the cell culture procedures. Gametoclonal variation The variation observed among plants regenerated from gametic cell cultures is termed gariation gametoclonal variation.

Gametoclonal variation in crop improvement. 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. Somaclonal variation of cytoplasmic male sterile lines with wild rice cytoplasm: Jiangsu Journal of Agricultural Sciences 18 2: There are four distinct sources of variations when referring to gametoclonal variation: Clone is defined as a population of a cell or organisms derived from a single cell or common ancestor by mitosis.

Gametoclonal variation in crop plants [1998]

Gametoclonal variation in pepper. New variation at the haploid level induced by the chromosome doubling, and iv. Biotechnology for solving agricultural problems: Somaclonal and gametoclonal variation. Somaclonal variation and induced mutations in crop improvement ,