Extrachromosomal Element Delta in Drosophila melanogaster. IV. Variation and Persistence of Delta-Associating Second Chromosomes in a Natural Population

Minamori, Sumio; Fujioka, Nobuko; Ito, Kazuko; Ikebuchi, Motoyoshi

doi:10.2307/2406553

Cited by 6 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Accordingly, it is expected that the frequency of both lethal and allelism frequencies of the population would become higher when the frequency of flies carrying delta is higher. This expectation was examined in a previous study (Minamori et al 1970) ; however, no conclusive evidence was obtained, although the lethal frequency of the S and ID chromosomes (the delta-retaining chromosomes) was higher than that of the population.…”

Section: Relation Of Infection and Delta-retention To Le+sle Frequenciesmentioning

confidence: 90%

“…Collections were made once or twice, summer (July, August) and fall (September, October), each year. The frequencies noted above were examined by the same procedure employed in an earlier study (Minamori et al 1970). …”

Section: Methodsmentioning

confidence: 99%

“…The results obtained in surveys made in the 1961-1968 period were reported (Minamori and Saito 1964;Minamori and Tatsukawa 1968;Minamori et al 1970) . The characteristics observed in this population during the period are as follows.…”

mentioning

confidence: 99%

See 2 more Smart Citations

INCREASING TREND IN FREQUENCIES OF LETHAL AND SEMILETHAL CHROMOSOMES IN A NATURAL POPULATION OF <i>DROSOPHILA MELANOGASTER</i>

Minamori

Ito

Nakamura

et al. 1973

The Japanese journal of genetics

Self Cite

View full text Add to dashboard Cite

Section: Relation Of Infection and Delta-retention To Le+sle Frequenciesmentioning

confidence: 90%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

INCREASING TREND IN FREQUENCIES OF LETHAL AND SEMILETHAL CHROMOSOMES IN A NATURAL POPULATION OF <i>DROSOPHILA MELANOGASTER</i>

Minamori

Ito

Nakamura

et al. 1973

The Japanese journal of genetics

Self Cite

View full text Add to dashboard Cite

“…This population was one of several long studied D. melanogaster populations to undergo genetic changes in the late 1960's (Ives, 1970;Band, 1972aBand, , 1972bMinamori et al, 1973;Watanabe et al, 1976;Choi and Paik, 1983;Inoue et al, 1984). The population contains a mutator element with male recombination activity, MR (Kidwell et al, 1977a), while the Hiroshima population carried an extrachromosomal element, 0 (see Minamori et al, 1970Minamori et al, , 1973Minamori and Ito, 1971;Woodruffet al, 1983). Either can cause lethal mutations on the second chromosome (Minamori and Ito, 1971; Woodruff, 1978, 1980;Woodruff et al, 1983).…”

mentioning

confidence: 99%

Continuing Studies on the South Amherst Drosophila melanogaster Natural Population During the 1970's and 1980's

Ives¹,

Band²

1986

Evolution

View full text Add to dashboard Cite

Continuing investigations on the South Amherst Drosophila melanogaster natural population following the significant decline and recovery of lethal (le) and semilethal (sle) frequencies in the late 1960's (Ives, 1970) show that the population has been remarkably stable although it contains MR (male recombination) and/or P DNA elements (Kidwell et al., 1977a; Green, 1980). A 13-year study affirms that the lethals present are nonrandomly distributed along the second chromosome and deficient on the right; they differ significantly in distribution from spontaneous (Ives, 1973) and δ-induced lethals (Minamori and Ito, 1971). Between 1970 and 1977, a total of 4,083 second chromosomes from the Markert subpopulation were analyzed; 28.9% of the chromosomes were lethal and 7.25% were semilethal in homozygous condition. Frequencies are similar for early summer and late fall collections although the rate of allelism among lethals is significantly higher in early summer than in late fall. For the large fall (1970-1979) Porch site population, 2,519 second chromosomes were analyzed; 29.5% were lethal and 8.0% were sublethal as homozygotes; the rate of allelism among lethals was 1.50%. At Hockanum, 1977-1983, lethal and semilethal frequencies were lower; the rate of allelism among lethals was 1.43%. The chromosome map distribution of lethals does not change between summer and late fall at Markert. The overall distributions of lethals at the Markert and Hockanum sites are similar. In tests for male recombination (MR) activity in the population over a 6-year period, a total of 0.47% recombinants were observed; these were uniformly distributed along the second chromosome. Comparisons are made with other long studied D. melanogaster populations.

show abstract