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Further data on the polarity of thepaba1locus ofAspergillus nidulans

✍ Scribed by A. M. Millington-Ward; F. B. J. Koops; Corma Mark-Iken

Publisher
Springer Netherlands
Year
1971
Tongue
English
Weight
597 KB
Volume
42
Category
Article
ISSN
0016-6707

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✦ Synopsis

Newly mapped pabal alleles are better distributed on the fine-structure map than those mapped earlier. They provide a proximal, a middle and a distal cluster, of four, one and four sites respectively (Fig. 1). The recombination fractions indicate map expansion (Fig. 2). The large samples of paba+ recombinants classified show that classes I and I III are positively correlated with increased recombination fraction, and classes I II and I II III are negatively correlated (Fig. 3). No polarity reversal was found. The results are explained in terms of a hybrid DNA model for crossing over.

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