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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Gametoclonal variation in pepper.

Somaclonal variation and induced mutations in crop improvement The variation observed among plants regenerated from gametic cell cultures is termed as gametoclonal variation. The concept of somaclonal variation is built on this definition. Variation is induced either during plant development or in vitro cell cultures, in the mitotic process. Both somaclonal and gametoclonal variations were detected in cultured cells and regenerated plants for morphological, biochemical characteristics, and chromosome number and structure.

Variations resulting from segregation and independent assortment. There are four distinct sources of variations when referring to 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.


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.

In vitro selection of somaclonal and gametoclonal variants for salt tolerance in rice. New variation induced at the diploid level, resulting in heterozygosity. Gametoclonal variation in crop improvement.

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. Somaclonal variation of cytoplasmic male sterile lines with wild rice cytoplasm: Materialy Res ikanskoi konferentsii, Alma Gametkclonal, noyabrya, Gametoclonal variation The variation observed among plants regenerated from gametic cell cultures is termed as gametoclonal variation.

New variation at the haploid level induced by the chromosome doubling, and iv.

Since plants derived from gametic cells are usually haploid but to retain the fertility chromosome number should be doubled. Advances in agricultural biotechnology: Somaclonal variation in a somaclonal mutant HX-3 of rice.

These variants are obtained from both meiotic and mitotic divisions.


Gametoclonal variation in crop plants [1998]

Biotechnology for solving agricultural problems: Somaclonal and gametoclonal variation in wheat, cotton and Gametcolonal. Problemy teoreticheskoi i prikladnoi genetiki v Kazakhstane: Chromosome number can be doubled by treating haploid plants with colchicines which is a frequently used mutagen to induce diploidization.

The life cycle of higher plants comprises a sporophytic 2n and a gametophytic n generation.

Somaclonal variation in banana: Clone is defined as a population of a cell or organisms derived from a single cell or common ancestor by mitosis.

Journal of Tropical and Subtropical Botany 10 2: Somaclonal and gametoclonal variation. Cellular and Molecular Biology Letters 7 4: Field performance of bermudagrass germplasm expressing somaclonal variation selected for divergent responses to fall armyworm.

PDF of Somaclonal and gametoclonal variation

Bermudagrass somaclonal variation for fall armyworm susceptibility. Jiangsu Journal of Agricultural Sciences 18 2: New genetic variations induced by the cell culture procedures.

The concept of gametoclonal variation evolved from that of somaclonal variation.