Mutationsversuche an Kulturpflanzen XI. Die Erzeugung von somatischen Mutationen mittels Röntgenstrahlen beim Obst

Gröber, Kurt

doi:10.1007/bf02099379

Cited by 15 publications

(4 citation statements)

References 19 publications

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“…5 or 10, of all shoots originating from the treated scions, because these -being primordia in the initially irradiated buds -are presumed to have a higher mutation potential than buds more apically situated . This process of propagation may be repeated with the buds of the second and third generations of shoots formed after a cut back at the end of the preceding season (BAUER, 1947(BAUER, , 1957ZWINTSCHER, 1955 ;GROBER, 1959 ;LAPINS, 1963LAPINS, , 1965FISCHER et al, 1966) . In this way Zwintscher, who used this procedure -first applied by Bauer on black currants -on tree fruits, obtained after three seasons some 700 trees from only 12 irradiated shoots each carrying 10 buds .…”

Section: Discussionmentioning

confidence: 99%

“…Regarding the LD-50, this was for apple on average 3 .5 krad, which is rather lower than the dose of 5 krad mentioned in literature (GRANHALL et al ., 1949 ;EHRENBERG et al ., 1952 ;BISHOP et al ., 1955 ;BISHOP, 1959 ;GROBER, 1959 ;LAPINS et al ., 1969) . There were no great differences between the 4 apple varieties, whether triploid (Boskoop) or diploid .…”

Section: Effect Of Irradiation Dosementioning

confidence: 99%

“…Pears appear to have a higher LD-50 than apples and show marked varietal differences substantiating the observations of DECOURTYE Other typical primary effects are for instance shoot bifurcation and leaf anomalies . Bifurcations occurred more frequently with the lower dosages (BISHOP et al ., 1955 ;GROBER, 1959) and originated lower on the shoot with the higher dosages . No significant differences in mutation frequency, regarding compact growth, were observed between bifurcated and normal appearing apple shoots (see also DECOURTYE, 1966) .…”

Section: Effect Of Irradiation Dosementioning

confidence: 99%

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Pre-selection of compact mutants induced by X-ray treatment in apple and pear

Visser¹,

Verhaegh²,

Vries³

1971

Euphytica

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Mutation breeding of apple and pear started in 1965 using dormant scions which, after irradiation (X-rays), were grafted on rootstocks . The most efficient dose for apple was around 3 krad, for pear between 4 .5 and 7 krad . Primarily shoots exhibiting compact traits were selected, defining such shoots as being thicker than normal for their length or shorter than normal for their diameter while having shorter internodes than normal shoots . The selection was carried out on one-season-old shoots of the same trees during three successive seasons, this involved a cut back at the end of the first and second season . The selected compact shoots yielded with apple on average four times more clones with a distinct compact habit than normal appearing shoots ; four out of every five clones were found to be stable in both apple and pear . Averaging: the results for apple, 7 % of the surviving trees produced shoots the clones of which showed compact growth, this was only 0 .5% for pear . In all several dozens of such clones were obtained of the apple varieties Golden Delicious, Cox's Orange Pippin, Belle de Boskoop and Tydeman's Early and a few distinct compact and some dwarf clones of Beurre Hardy and Doyenne du Cornice .

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Section: Discussionmentioning

confidence: 99%

Section: Effect Of Irradiation Dosementioning

confidence: 99%

Section: Effect Of Irradiation Dosementioning

confidence: 99%

See 1 more Smart Citation

Pre-selection of compact mutants induced by X-ray treatment in apple and pear

Visser¹,

Verhaegh²,

Vries³

1971

Euphytica

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“…For especially sensitive, herbaceous material these doses may be halved, while for many lignified or dormant structures they may be doubled. Bishop, 1958 Summer buds, 2,000 to 4,000 r, Grober, 1959 Growing trees, 25 to 50 r/day, several years; 50-100 r/day, 5 months, Granhall and…”

Section: The Technique Of Mutagenic Treatmentmentioning

confidence: 99%