Open AccessGENE EXPRESSION IN INTERSPECIFIC HYBRIDS, II. RNA SYNTHESIS IN THE LETHAL CROSS Arbacia lixula [unk] × Paracentrotus lividus [unk]
Author(s) -
Hélène Denis,
Jean Brachet
Publication year - 1969
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.62.2.438
Subject(s) - paracentrotus lividus , sea urchin , biology , dna , rna , transcription (linguistics) , gene , interspecific competition , microbiology and biotechnology , genetics , botany , linguistics , philosophy
All types of RNA are actively synthesized by the lethal hybrid obtained by fertilizing the eggs of the sea urchinParacentrotus lividus with the sperm of another sea urchin species,Arbacia lixula . DNA-like RNA and ribosomal RNA seem to be less stable in hybrids than in normalA. lixula andP. lividus embryos.Labeled RNA's fromA. lixula andP. lividus were found to hybridize about 2.5 times as well with DNA of their own species as with DNA of the other species. RNA from the interspecific hybrid hybridized from 1.6 times to twice as well withA. lixula DNA as withP. lividus DNA, although the hybrid embryos were previously shown5 to contain more DNA of maternal than of paternal type. Transcription of the paternal (foreign) genome seems therefore to be favored in some way in the interspecific hybrid.