The movement of pollen between crop and wild sunflowers (both Helianthus annuus) has led to concerns about the possible introduction of crop transgenes into wild populations. The persistence of crop traits in wild populations will depend in part on the relative fitness of crop-wild hybrid vs. wild plants. Using seeds from two large experimental field plots, we found that seeds produced by crop-...

We prove new cell-probe lower bounds for data structures that maintain a subset of {1, 2, ..., n}, and compute the median of the set. The data structure is said to handle insertions non-adaptively if the locations of memory accessed depend only on the element being inserted, and not on the contents of the memory. We prove that any such data structure must satisfy: tm ≥ Ω ( n 1 2(ti+1) w · ti ) ...

Phytoextraction is an environmentally friendly in situ technique for cleaning up metal contaminated land. Unfortunately, efficient metal uptake by remediation plants is often limited by low phytoavailability of the targeted metals. Chelant assisted phytoextraction has been proposed to improve the efficiency of phytoextraction. Phytoremediation involves several subsequent steps: transfer of meta...

Much of our knowledge of speciation genetics stems from quantitative trait locus (QTL) studies. However, interpretations of the size and distribution of QTL underlying species differences are complicated by differences in the way QTL magnitudes are estimated. Also, many studies fail to exploit information about QTL directions or to compare inter- and intraspecific QTL variation. Here, we compre...

Plasmopara halstedii (Farl.) Berl. & De Toni causing downy mildew of sunflower is responsible for considerable economic losses worldwide. Because P. can be seed-transmitted, monitoring seeds pathogen contamination important the seed trade. The relevance asymptomatic or latent infections as factors disease spread have not been studied by molecular techniques. A marker based on a putative effecto...

The purpose of the study was to evaluate influence mineral fertilizers and methods basic tillage on yield oil content sunflowers in north Kazakhstan. experiment conducted agricultural experimental Station Zarechnoye limited liability partnership with southern thin chernozem soils. Records observations growth development were carried out using modern methodological recommendations. used techniqu...

Sunflowers are one of the flowers chosen by many localities to grow because they both create beautiful landscapes and also a source raw materials for oil from seeds. This study aims determine planting density amount fertilizers being suitable growing, well-developed, high-yielding in Thua Thien Hue province. Research results shown that fertilization did not significantly affect germination rate...

Experiments were performed on intact sunflowers (Helianthus annuus) placed in a specially designed experimental chamber which allows instantaneous modifications of the atmospheric composition without changing any other conditions. After one night in normal conditions, the plant was illuminated under pure nitrogen atmosphere; the opening stomatal movement, measured as a transpiration rate variat...

Genomic studies of speciation often report the presence of highly differentiated genomic regions interspersed within a milieu of weakly diverged loci. The formation of these speciation islands is generally attributed to reduced inter-population gene flow near loci under divergent selection, but few studies have critically evaluated this hypothesis. Here, we report on transcriptome scans among f...