Titlebook: Somaclonal Variation in Crop Improvement I; Y. P. S. Bajaj Book 1990 Springer-Verlag Berlin Heidelberg 1990 DNA.Erosion.Hordeum vulgare L.

JUST

Somaclonal Variation in Barley (,)Barley is the world’s fourth most important cereal crop after wheat, maize, and rice. Three unique characteristics have enabled barley to persist as a major cereal crop through many centuries: (1) broad ecological adaptation, (2) utility as a feed and food grain, and (3) superiority of barley malt for use in brewing.

parsimony

Somaclonal Variation for Salt Resistanceariability existing in tissue or cell culture (Rains 1982; Stavarek and Rains 1984). Such a supplement is especially important in species in which the gene pool is poor or completely lacks such variability. . receied

植物茂盛

Somaclonal Variation in Riceh 1984). There are 22 species in the genus ., most of which are diploid (2n = 24), and seven species are tetraploid (4n = 48) (Chang 1985). . L. and . Steud are the two cultivated species. . is usually divided into three eco-species: ., and ..

诱拐

Genetic Bases of Variation from in Vitro Tissue Cultureermed differently according to authors. “Phenovariants” was first proposed by Sibi (1971) as describing the new regenerated phenotypes, while “somaclonal variation” was used by Larkin and Scowcroft (1981), and seems to be generally accepted for all types of variations coming from in vitro tissue culture.

expansive

Environmentally Induced Variation in Plant DNA and Associated Phenotypic Consequencesthe potential to be transmitted to the next generation. This form of life strategy and its consequences for variation in higher plants has been reviewed recently (Walbot and Cullis 1985: Walbot 1986 ).

虚弱

Somaclonal Variation — Origin, Induction, Cryopreservation, and Implications in Plant Breedingchromosome numbers and ploidy level (Partanen 1963; D’Amato 1965; Murashige and Nakano 1966). However, till the mid 1970’s such changes were considered undesirable and were therefore discarded because the main emphasis was on clonal propagation and genetic stability of the cell cultures. Extensive s

Matrimony

bourgeois

Genetic Mosaics and Chimeras: Implications in Biotechnologyone genotype; a genotype which is the product of recombination following fertilization. Mosaics can arise spontaneously or can be induced with chemical or physical mutagens. In mutagenized plants most of the mutant sectors arise outside the shoot apex (i.e., “extra-apical mosaicism”, described by Be

使纠缠

哑巴

Molecular Basis of Somaclonal Variationl possible types involving qualitative or quantitative traits, from single Mendelian mutations to dramatic changes in the ploidy level, aneuploidy. chromosomal aberrations, and even mutations of cytoplasmic origin have been reported.