Using the Shioda–Tate theorem and an adaptation of Silverman’s specialization theorem, we reduce Mordell–Weil ranks for abelian varieties over fields finitely generated infinite [Formula: see text] to Néron–Severi recently proved by Ambrosi in positive characteristic. More precisely, prove that after a blow-up base surface text], all vertical curves fibration with from complement sparse subset ...

The article presents data on study of the productivity potato early ripening varieties (Legenda, Russia; Red Scarlet, Netherlands) and middle-early (Irbitskiy Gala, Germany) grown aeroponic installations in artificial lighting conditions: three-tier adaptive installation (“Syntol” production) single-tier produced by “Biological systems” plant. Potato plants were characterized active growth deve...

For various reasons such as ideology of patronage, fear of censorial measures and specific cultural and literary plans, authors may present their original texts as translation, and sometimes translators manipulate the original text to the extent that it can not be considered as translation anymore. This research was aimed at investigating Bastin's adaptation as a kind of pseudo-translation. He ...

Abstract The breeding of heat-tolerant (HT) varieties is considered an effective adaptation measure to reduce the impacts global warming on crops. However, little known about how much heat tolerance needs be attained in HT and by when should introduced a climate. Here, we assessed effect introduction rice incidence low-quality grains (chalky grain, CRG, as result high temperatures), formulated ...

Given a curve of genus 3 with an unramified double cover, we give an explicit description of the associated Prym variety. We also describe how an unramified double cover of a non-hyperelliptic genus 3 curve can be mapped into the Jacobian of a curve of genus 2 over its field of definition and how this can be used to do Chabautyand Brauer-Manin type calculations for curves of genus 5 with an unr...

Wheat varieties with a winter growth habit require long exposures to low temperatures (vernalization) to accelerate flowering. Natural variation in four vernalization genes regulating this requirement has favored wheat adaptation to different environments. The first three genes (VRN1-VRN3) have been cloned and characterized before. Here we show that the fourth gene, VRN-D4, originated by the in...

We have investigated the role of selection in the determination of the detected levels of introgression from modern maize hybrid varieties into maize landraces still cultivated in situ in Italy. We exploited the availability of a historical collection of landraces undertaken before the introduction and widespread use of modern maize, to analyse genomic changes that have occurred in these maize ...

Developing high yielding and stable genotypes for wide and specific adaptation is important in wheat (Triticum aestivum L.) production. The objective of this study was to exploit the gains from genotype by environment interaction for increased bread wheat production in eastern Africa. Thirty-three advanced bread wheat lines, along with two check varieties (Danda’a and Hidasse) were evaluated at...

Tobacco (Nicotiana tabacum L.) is an important industrial crop grown in more than one hundred countries worldwide, with high adaptability on a great variety of soils, and under quite diverse climatic conditions. Information regarding the chemical composition tobacco leaves for industry because it generally may exhibit differences among different locations. In this study, five oriental six flue ...