To investigate the level and pattern of DNA polymorphism in the noncoding regulatory region in the plant nuclear genome, 2.4 kb of nucleotide sequence of the 5' upstream region of ADH: was determined for 14 ecotypes of Arabidopsis thaliana and five accessions of Arabis gemmifera. Using this data set and previously determined ADH: sequence data, DNA variation was analyzed in a 4.4-kb region of t...

Rock bass (Ambloplites rupestris) are a widespread centrarchid species with both riverine and lacustrine populations. After precipitation events, rivers often carry elevated silt loads, where as lakes generally remain free from suspended silt and sediment. To examine the physiological effects of silt on rock bass, we conducted a series of experiments using fish from Lake Opinicon and the Grand ...

Patterns of DNA sequence diversity vary widely among genes encoding proteins that protect plants against pathogens and herbivores. Comparative studies may help determine whether these differences are due to the strength of selection acting on different types of defense, in different evolutionary lineages, or both. I analyzed sequence diversity at three chitinases, a well-studied component of de...

In flowering plants that produce concealed rewards, pollinator foraging preferences may select for floral advertisement traits are correlated with rewards. To date, studies have not focused on the potential honest signals to vary across populations, which could occur due differences in communities or plant mating system. We tested variation and within populations systems Arabis alpina, a broadl...

Türkiye bağcılığı sosyoekonomik anlamda en önemli ürün gruplarının arasında yer almaktadır. Bağlarda birçok zararlı organizma grubu özellikle de virüs enfeksiyonları bitkiyi zayıflatıp, verim ve kalitesinde azalmalara yol açtığından karantina sertifikasyonda başı çekmektedir. Son yarım asırda ülke bağ araştırmalarında çalışmalar yapılmış son 20 yılda virüslerin tanımı, karakterizasyonu mücadele...