Bryant S H
Genetics. 1980 Aug;95(4):1023-31. doi: 10.1093/genetics/95.4.1023.
A chromosome 2 lethal allelism rate of about 3% found in the 1974 population of D. pseudoobscura in Death Valley, California. This rate was significantly higher than allelism rates in other Southern California populations. The Death Valley population was sampled again in 1975 and 1977, with allelism rates of 1% and 0.5%, respectively. In 1974, several lethals were in high frequencies (about 1%), a pattern that reappeared in 1975 and 1977. However, none of the lethals in high frequency one year was in high frequency another year; the particular lethal alleles present in this ephemeral population appear to be due to their random presence in the flies which refound the population every winter. The results for the Death Valley population are compared with a Japanese population of D. melanogaster in which lethals in high frequency one year also in high frequency in succeeding years and with earlier work on chromosome 3 of D. pseudoobscura, which showed a lower lethal frequency and higher allelism rate.
1974年在加利福尼亚州死亡谷的拟暗果蝇种群中发现，2号染色体的致死等位基因率约为3%。这一比率显著高于南加州其他种群的等位基因率。1975年和1977年对死亡谷种群再次进行采样，等位基因率分别为1%和0.5%。1974年，有几种致死基因频率较高（约1%），这种模式在1975年和1977年再次出现。然而，一年中频率较高的致死基因在另一年并不处于高频率；这个短暂种群中存在的特定致死等位基因似乎是由于它们在每年冬天重新建立种群的果蝇中随机出现。将死亡谷种群的结果与日本的黑腹果蝇种群进行比较，在日本种群中，一年中频率较高的致死基因在随后几年中也处于高频率，同时与之前对拟暗果蝇3号染色体的研究进行比较，之前的研究显示致死频率较低但等位基因率较高。
