APPARENT CYTOPLASMIC STERILITY IN DROSOPHILA PAULISTORUM
نویسندگان
چکیده
منابع مشابه
Induction of hybrid sterility in nonhybrid males of Drosophila paulistorum.
HREE different kinds of hybrid sterility of males occur within the superspecies Drosophila ptzulistorum Dobzhansky and Pavan, and a fourth one will he described in the present paper. The superspecies consists of at least five races or incipient species (DOBZHANSKY and SPASSKY 1959). The F, hybrids between these races are fertile if females and sterile if males. This is a sterility of the genic ...
متن کاملCharacteristics of the Drosophila paulistorum Male Sterility Agent in a Secondary Host, Ephestia kuehniella.
Crosses among the six semispecies of Drosophila paulistorum produce sterile male hybrids. This sterility is caused by an agent which has characteristics of a microorganism. It is pathogenic in a secondary host, the larvae of the Mediterranean meal moth, Ephestia kuehniella, and can be serially passaged in Ephestia, where it is lethal. The agent was passaged back into D. paulistorum, where it in...
متن کاملMechanisms of male sterility in hybrids of the Drosophila paulistorum group.
ROSOPHILA PAULISTORUM is a superspecies composed of five semispecies (the Centroamerican, Amazonian, Andean, Orinocan, and Interior), and a heterogeneous group of Transitional populations (DOBZHANSKY, PAVLOVSKY and EHRMAN 1969; SPASSKY et al. 1971 ) . External morphological, physiological, and ecological differences between the semispecies are too small to be of use in distinguishing the semisp...
متن کاملStreptococcal L-forms isolated from Drosophila paulistorum semispecies cause sterility in male progeny.
The Drosophila paulistorum complex contains six semispecies that do not normally interbreed. In the laboratory, crosses between semispecies produce fertile daughters and sterile sons. Microbial endosymbionts have been observed in all D. paulistorum flies that display this male sterility. Streptococcal L-forms have been isolated from the Andean-Brazilian (Mesitas) and Transitional (Santa Marta) ...
متن کاملCytoplasmic male sterility in Brassicaceae crops
Brassicaceae crops display strong hybrid vigor, and have long been subject to F1 hybrid breeding. Because the most reliable system of F1 seed production is based on cytoplasmic male sterility (CMS), various types of CMS have been developed and adopted in practice to breed Brassicaceae oil seed and vegetable crops. CMS is a maternally inherited trait encoded in the mitochondrial genome, and the ...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1963
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.49.2.155