Cyto-Genetic Consequences of X-Ray Treatment of Pollen in Petunia

Publisher Website
Google Scholar
Abstract
Pollen of Petunia (2[image] = 14) treated with 10,000 to 100,000 r X-rays was applied to stigmas of untreated plants. Pollen exposed to 50,000 r functioned to produce viable seed. The half-kill dose for the number of plants produced per flowers pollinated was ca. 9,000 r. Tests applied to X1 and X2 showed no evidence of pseudogamous development of the egg or of diploid individuals from eggs in which a doubling of the chromosome number had occurred. 33 X1 plants exhibited gross chromosomal aberrations; 1/3 of these were root-shoot chimeras, the difference usually involving the presence or absence of a fragment chromosome. Of 3 monosomics obtained the odd chromosome behaved as a univalent in 1 and was usually associated in a trivalent in the other. The trivalent pairing is attributed to duplication in the normal complement of Petunia.
Keywords

This publication has 4 references indexed in Scilit: