354 MUTATION AND PLANT BREEDING 



role in diploidizing artificial polyploids and inducing disomic pairing 

 and better fertility is not yet well understood. 



Induced mutations may open possibilities to apply new breeding 

 methods to specific crops. Induced self-compatibility in self-sterile 

 plants and induced sexuality in apomictic plants are given as 

 examples. 



It is essential not to set mutation breeding in opposition to more 

 conventional breeding methods but rather to evaluate this novelty as 

 an integral and interdependent part. In this way, and with more 

 complete knowledge in relation to the specific breeding objects, the 

 value of induced mutation in crop improvement will certainly 

 increase. 



References 



1. Anderson, E. G. 1956. The application of chromosomal techniques 



to maize improvement. Brookhaven Symp. Biol., 9: 23-35. 



2. Andersson, G. 1953. Svalof's Regina varraps II. Sveriges Utsadesf. 



tidskr., 63: 201-204. 



3. and Olsson, G. 1954. Svalof's Primex White Mustard — a 



market variety selected in X-ray-treated material. Acta Agr. Scand., 

 4: 574-577. 



4. Bandlow, G. 1959. Mutationsversuche an Kulturpfianzen: X. Tiber 



Pleiotropie und eine zweifache Mutante bei Wintergerste. Zuc li- 

 ter, 29: 123-132. 



5. Bauer, R. 1957. The induction of vegetative mutations in Ribes 



nigrum. Hereditas, 43: 323-337. 



6. Blixt, S., Ehrenberg, L., and Gelin, O. 1960. Quantitative studies 



of induced mutations in peas: III. Mutagenic effect of ethylene- 

 imine. Agr. Hart. Genet., 18: 109-123. 



7. Borg, G., Froier, K., and Gustafsson, A. 1958. Pallas barley, a 



variety produced by ionizing radiation: Its significance for plant 

 breeding and evolution. 2nd Int. Conf. Peaceful Uses Atomic 

 Energy, UN, Geneva, A /Conf. 15 / P. 2468. 



8. Breider, H., and Reichardt, A. 1955. Neue Wege in der Pflanzen- 



zuchtung mittels Rontgenstrahlcn. Strahlentherapic 97: 151-158. 



9. Brewbaker, J. L., Shapiro, N., and Majumder, S. 1958. The incom- 



patibility inhibition in flowering plants. Proc. 10th Int. Congr. 

 Genet., 2: 33. 

 10. Briicher, H. 1943. Experimentelle Untersuchungen iiber den Selek- 

 tionswert Kiinstlich erzengter Mutanten von Antirrhinum inajus. 

 Zeit. f. Botanik, 39: 1-47. 



