Mycological Organization

Identification of Saprolegnia Spp. Pathogenic in Chinook Salmon : Final Report.

“…Colonized hemp seeds were prepared by boiling the hemp seed until the coat split open and the radicle was exposed (Emerson, 1958). The seed was then placed at the growing edge of a SaproEegnia colony growing on cornmeal agar held at 10°C.…”

Molecular Mechanism for Genetic Recombination

“…The molecular mechanism underlying genetic exchange in eukaryotic organisms is a subject that has received wide attention in recent years (1). It is generally thought that genetic recombination begins with the pairing of two parental DNA duplexes on the nucleotide level (synapsis) to give a hybrid DNA structure containing both parental strands (2).…”

The Synaptinemal Complex and Four-Strand Crossing Over

“…After removal of histones and other proteins from the fibrils, physical contact and base-bybase pairing of the two DNA double helices is established, then followed by breakage and reciprocal reunion, as is required for crossing over and chiasma formation (16). As evidenced by gene conversion (10), the molecular events of recombination may involve heteroduplex formation with cutting and repairing of DNA strands in the effectively paired regions (17). A small amount of DNA synthesis during pachytene has been demonstrated (18).…”

“…DNA replication takes place in the haploid nuclei before karyogamy (7). The zygote nucleus in stage 6 (10).…”