Titlebook: Somaclonal Variation and Induced Mutations in Crop Improvement; S. M. Jain,D. S. Brar,B. S. Ahloowalia Book 1998 Springer Science+Business

HAUNT

Somaclonal Genetics of Forest Treesities for recovering regenerants with genetic variability. Nearly all types of genetic change detected in plants following irradiation or chemical treatments have also been observed in plant tissue cultures. However, in plant tissue cultures the spectrum of genetic variation may be additionally enha

AWE

侧面左右

Protoclonal Variation in Crop Improvementzation of interspecific and intergeneric plants. Protoplasts can be isolated from diverse tissues in a wide range of species, and they are ideally suited for research in somatic cell genetics. In addition, investigations on the processes of plant regeneration and their control may contribute to a be

Pert敏捷

Chromosomal Basis of Somaclonal Variation in Plants plants and for generating somaclonal variation (Jain, 1993a,b, 1997; Karp, 1995). This genetic variation is important in crop improvement, but also causes problems in maintenance of genetic fidelity during long-term . conservation of germplasm, in clonal propagation of germplasm and in the producti

justify

Somaclonal Variation and , Selection for Crop Improvementr, are not always expressed and only a few of the alterations become evident as pheno-typic and cytogenetical modifications in plants regenerated from the callus tissue (Bayliss, 1980; Lee and Phillips, 1988). Larkin and Scowcroft (1981) defined this type of variation as ‘somaclonal variation’. Soma

Conflict

Field Performance of Banana Micropropagules and Somaclones = 3x = 33), although diploid and tetraploid cultivars occur in much lower numbers. Its fruit provides one of the major commodities in international trade, but is far more important as a starchy staple food in local economies (Stover and Simmonds, 1987). However, production is threatened by pest and

appall

衰老

Induced Mutation in Plant Breeding: Current Status and Future Outlookent in utilizing nutrients, (c) more tolerant to diseases and pests, and (d) improved in yield and quality. There is a continuous change with time, in natural and man-made envir-onments and human population needs. Therefore, our continuous efforts should be directed towards tailoring the new cultiva

stratum-corneum

Techniques and Mutagenesis for the Improvement of Vegetatively Propagated Plantsriation is the starting point of any breeding programme. In most crops, sufficient genetic variation is present among land races, cultivars and their wild relatives. In conventional plant breeding programmes this is followed by several years of selection and field evaluation before a desired genotyp

凹槽

Mutation Breeding in Cereals and Legumestional methods of plant breeding. As early as 1942, the first mutant for disease resistance was reported in barley showing resistance to powdery mildew (Freisleben and Lein, 1942). This encouraged further work on mutation breeding, leading to the release of mutant cultivars in several crops. The FAO