Papog M A, Vorob'eva L I, Strashniuk V Iu
Department of Genetics and Cytology, Kharkov National University, Kharkov, 61077 Ukraine.
Genetika. 2003 Aug;39(8):1053-8.
In Drosophila melanogaster lines LA (low activity), HA (high activity), and Oregon-R (wild type), the effect of genetic background on endoreplication in giant chromosomes of salivary glands, fecundity, and expression of mutation ey was studied. The degree of chromosome polyteny and the number of adult flies in saturated lines eyHA, eyBA, and eyOr were significantly higher than in the original lines. The degree of chromosome polyteny was correlated with fecundity. The expressivity of the ey character was shown to be far lower in lines eyLA, eyHA, and eyOr than in the original eyeless line. In the saturated lines, the eye facets were reduced to a similar degree. All the lines studied displayed clear-cut sexual distinctions in this parameter. In the eyHA line, the coefficients of variation for the degree of chromosome polyteny, fecundity, and expressivity of the ey mutation were much lower than in lines eyeless, eyLA, and eyOr.
在黑腹果蝇品系LA（低活性）、HA（高活性）和俄勒冈-R（野生型）中，研究了遗传背景对唾液腺巨型染色体中的核内复制、繁殖力以及突变ey表达的影响。在饱和品系eyHA、eyBA和eyOr中，染色体多线化程度和成年果蝇数量显著高于原始品系。染色体多线化程度与繁殖力相关。结果表明，ey性状的表现度在品系eyLA、eyHA和eyOr中比在原始无眼品系中低得多。在饱和品系中，小眼面减少到相似程度。所有研究的品系在这个参数上都表现出明显的性别差异。在eyHA品系中，染色体多线化程度、繁殖力和ey突变表现度的变异系数比无眼品系、eyLA品系和eyOr品系低得多。
