GENETICS OF NATURAL POPULATIONS. XXVIII. THE MAGNITUDE OF THE GENETIC LOAD IN POPULATIONS OF DROSOPHILA PSEUDOOBSCURA

Technical Report · Tue Oct 31 04:00:00 EST 1961

OSTI ID:4075619

Spassky, B; Spassky, N; Pavlovsky, O; Krimbas, M G; Krimbas, C; Dobzhansky, Th

Results are reviewed from previous studies on genetic loads in Drosophila. A series of studies was made on Drosophila pseudoobscura to determine whether individuals carrying different combinations of chromosomes are phenotypically uniform or heterogeneous, and if heterogeneous, whether or not the heterogeneity is correlated with the effects of the component chromosomes in homozygotes. The magnitude of the genetic loads carried in the second and third chromosomes of Drosophila pseudoobscura were estimated for samples from populations living near Austin, Tex., and Mather, Calif. The effects of the chromosomes on the viability of the homozygotes were found to differ in cultures raised at 25 and at l5 deg C. Data are tabulated. A negative correlation between viability and variability was observed for both homozygotes and heterozygotes. (C.H.)

• Research Organization: Columbia Univ., New York
• NSA Number: NSA-15-012678
• OSTI ID: 4075619
• Report Number(s): TID-12109
• Country of Publication: United States
• Language: English

Related Subjects

BIOLOGY AND MEDICINE
CHROMOSOMES
ENVIRONMENT
GENETICS
INSECTS
POPULATIONS