Über die Chimärenbildung in Gerstenpflanzen nach Röntgenbestrahlung von Samen

Radiation and genetical studies to estimate the number of embryonic initials taking part in the formation of the shoot meristem of Vicia ervilia and Lathyrus sativus

“…A third method which depends on the estimation of the number of mutated sectors in the M 1 spike or shoot meristem from the appearance of mutations in the M 2 generation was used by BLIXT et al (1960) in peas, most thoroughly by GAUL (1959 and in barley, GLADSTONE (1958) in Blue Lupin, KAUKIS and REITZ (1955) in Sorghum, PRASAD and GODWARD (1969) in Phalaris, WELLING and GOTTSHALK (1961) in peas and ZANNONE (1962) in Vicia saliva .…”

“…1949, BLIXT et al . 1960, BRUMFIELD 1943, CALDECOTT and SMITH 1952, GAUL 1959, PRASAD and GODWARD 1969 . These studies reveal that the species differ in the number of initial cells present in the shoot meristem .…”

Über die Häufigkeit der nach Röntgenbestrahlung von Samen überlebenden Corpusinitialen

“…a.). GAUL (1958GAUL ( , 1959) bezeichnet sie in diesem Zusammenhang als ,,diplontische Selektion", da sie innerhalb der diploiden Kernphase ablauft, und unterscheidet sie von der ,,haplontischen Selektion", die in der haploiden Phase erfolgt.…”

“…Vergleich der e r r e c h n e t e n u n d b e o b a c h t e t e n W e r t e Fiir diesen Vergleich sei Zahlenmaterial herangezogen, das GAUL (1959) bei Versuchen mit Gerste ermittelt hat. Beim Gerstenkeim liegen die Verhaltnisse zwar etwas anders, als sie unserer Berechnung zugrunde gslegt wurden.…”

Natural and induced mutation rates in diploid, tetraploid, and hexaploid oats

“…Nybom (195^) also thought that spikes represent unicellular primordia at the time of irradiation of "barley seed. On the other hand, the results of Gaul (1959) indicate that a barley head is probably descended from more than one cell. Yamaguchi (1962) disclosed two kinds of panicles in rice: (1) those which arise from a single cell, and (2) The mutation frequency induced by mutagens in cereal seeds could be viewed as having two components; namely, (a) the number of spike primordia carrying one or more mutations and (b) the number of mutated initials in each spike primordium.…”