منابع مشابه
Genetics of Cryptic Speciation within an Arctic Mustard, Draba nivalis
Crossing experiments indicate that hybrid sterility barriers frequently have developed within diploid, circumpolar plant species of the genus Draba. To gain insight into the rapid evolution of postzygotic reproductive isolation in this system, we augmented the linkage map of one of these species, D. nivalis, and searched for quantitative trait loci (QTLs) associated with reproductive isolation....
متن کاملFemales benefit from mating with different males in the scorpionfly Panorpa cognata
The adaptive significance of female polyandry has become a recurrent subject of recent theoretical and empirical research. It has been argued that in addition to direct benefits, such as nuptial gifts or an adequate sperm supply, females may gain genetic benefits from mating with different males. Females of the scorpionfly Panorpa cognata mate with several males during their lifetime. In an exp...
متن کاملAmorous scorpionflies: causes and consequences of the long pairing prelude of Panorpa cognata
The scorpionfly Panorpa cognata has a prolonged premating period. After the male attracts a female, there is usually a long delay, from a few minutes to almost 7 h, before the male initiates copulation by secreting a salivary mass. In our experiments, we manipulated the amount of food, and hence the condition, of males and then measured their premating duration. The premating duration was stron...
متن کاملMolecular evidence for allopolyploid speciation and a single origin of the narrow endemic Draba ladina (Brassicaceae).
Draba ladina (Brassicaceae) is a small alpine flower endemic to the Swiss Alps. It occurs exclusively at elevations between 2600 and 3000 m and is restricted to less than a dozen mountains in the Lower Engadin. Morphological characters and polyploidy suggest a hybrid origin. Potential diploid progenitor species are distributed widely and often occur sympatrically. To study the evolutionary hist...
متن کاملPhenology and temperature-dependent development of Ceutorhynchus assimilis, a potential biological control agent for Lepidium draba
Lepidium draba (Brassicaceae) is a major concern for agriculture and biodiversity in the western United States. As current control methods do not provide long-term, sustainable solutions, research has been conducted to find biological control agents. Ceutorhynchus assimilis is one of the currently investigated candidates. Known as oligophagous in the literature, a specialist clade of this root-...
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ژورنال
عنوان ژورنال: Oesterreichisches Botanisches Wochenblatt
سال: 1854
ISSN: 0378-2697,1615-6110
DOI: 10.1007/bf02055953