scholarly journals Evaluation of resistance to Pseudoperonospora humuli and of the content of alpha acids and hop oils in hops of selected genetic resources of hop Humulus lupulus L.

2021 ◽  
Author(s):  
Markéta Trefilová ◽  
Vladimír Nesvadba ◽  
Jitka Charvátová
Keyword(s):  
Genetic Resources ◽  
Drought Resistance ◽  
Acid Content ◽  
Oil Content ◽  
Humulus Lupulus ◽  
The Caucasus ◽  
Pseudoperonospora Humuli ◽  
Humulus Lupulus L ◽  
In The Wild

Twenty hop genotypes were selected for the evaluation of resistance to primary and secondary Pseudoperonospora humuli infection and of alpha acid and hop oil content in the hops. From the wild hop genotypes, two from Canada and one from Belgium showed resistance. Among the registered hop varieties, the Czech varieties Kazbek and Boomerang were the most resistant. Both wild hop genotypes from Canada showed the highest content of alpha acids among the wild hop entries, namely 4% w/w. The lowest variability of the alpha acid content in the wild hop category was found in two wild hop varieties from the Caucasus, one from Austria and one from Lithuania. The highest content of hop oils was determined in two hop genotypes from Canada and two from Belgium. Wild hop genotypes from the Caucasus have the lowest variability of hop oils among the wild hop entries. Two hop genotypes from Canada and one from Belgium were selected for breeding aimed at drought resistance.

Analysis of the survival rate of world hop varieties (Humulus lupulus L.) in the collection of the Chuvash Research Institute of Agriculture

2021 ◽  
Author(s):  
Yu.S. Osipova ◽  
Keyword(s):  
Survival Rate ◽  
Genetic Resources ◽  
Plant Genetic Resources ◽  
Humulus Lupulus ◽  
Humulus Lupulus L ◽  
The World ◽  
History Of ◽  
National Programs ◽  
Research Institute

The article presents the results of research of hop varieties collected from various hop-producing countries of the world in order to preserve the genetic resources of this crop. The history of the development of the bioresource genetic collection of common hops (Humulus lupulus L.) is described. In Chuvashia in 1980, work began on the collection and creation of a collection of hops. In many countries of the world, national programs are being developed for the conservation and use of plant genetic resources, including hops.

Identification of QTLs for alpha acid content and yield in hop (Humulus Lupulus L.)

Euphytica ◽  
2009 ◽  
Vol 170 (1-2) ◽  
pp. 141-154 ◽  
Author(s):  
Andreja Cerenak ◽  
Zlatko Satovic ◽  
Jernej Jakse ◽  
Zlata Luthar ◽  
Klaudija Carovic-Stanko ◽  
...  
Keyword(s):  
Acid Content ◽  
Humulus Lupulus ◽  
Humulus Lupulus L

scholarly journals The impact of weather conditions on alpha-acid content in hop (Humulus lupulus L.) cv. Aurora

2020 ◽  
Vol 66 (No. 10) ◽  
pp. 519-525
Author(s):  
Douglas MacKinnon ◽  
Viljem Pavlovič ◽  
Barbara Čeh ◽  
Boštjan Naglič ◽  
Martin Pavlovič
Keyword(s):  
Relative Humidity ◽  
Acid Content ◽  
Correlation Coefficients ◽  
Weather Conditions ◽  
Humulus Lupulus ◽  
Forecasting Model ◽  
Time Period ◽  
Humulus Lupulus L ◽  
Time Of Year ◽  
The Impact

The influence of four main weather attributes on the content of alpha-acids of the hop cv. Aurora for the period 1994–2019 was studied. By analysing correlation coefficients, specific times of the year when the weather conditions affect the alpha-acid content with the goal of creating a forecasting model in Slovenia were identified. The most significant periods of weather that impacted the alpha-acid contents throughout the growing time of year are recognised as attributes of temperatures (T), rainfall (R) and sunshine (S) calculated from the 25<sup>th</sup> to 30<sup>th</sup> week (T<sub>2530</sub>, r = –0.78, P &lt; 0.01; R<sub>2529</sub>, r = 0.72, P &lt; 0.01 and S<sub>2529</sub>, r = –0.81, P &lt; 0.01) and attributes of relative humidity (RH) from the 27<sup>th</sup> to 32<sup>nd</sup> week (RH<sub>2732</sub>, r = 0.82, P &lt; 0.01). T<sub>2530</sub> stands for the amount of active temperatures from June 18 to July 29. Likewise, R<sub>2530</sub> matches to the precipitation (in mm or L/m<sup>2</sup>) during the same time period.  

scholarly journals Transfer of the hop (Humulus lupulus L.) alpha-bitter acid content to progenies of F1 and I1 generations in selected parental components

2011 ◽  
Vol 49 (No. 6) ◽  
pp. 269-276
Author(s):  
V. Nesvadba ◽  
J. Černý ◽  
K. Krofta
Keyword(s):  
Acid Content ◽  
Humulus Lupulus ◽  
Initial Material ◽  
Probability Level ◽  
Humulus Lupulus L ◽  
Bitter Acid ◽  
F1 Generation

In the period 1999&ndash;2001 the transfer of a-acid content from selected parents to their progenies was evaluated. Four female plants (English varieties Target and Yeoman, German variety Magnum and Czech variety Premiant) and four male plants from the gene resources of male hops (82/6, 86/4, 87/3, clone 72) were chosen as the initial material. Progenies of F1 generation of Magnum and Yeoman show significantly higher a-acid content compared to the progenies of other female hops. Progenies of F1&nbsp;generation of male plants 86/4 and 87/3 show significantly higher a-acid content compared to the progenies of other male plants. Progenies of I1&nbsp;generation of Magnum variety and male 86/4 contain the highest amount of a-acids. Progenies of F1&nbsp;generation have higher a-acid content at the 99% probability level compared to the progenies of I1&nbsp;generation. Progenies of both generations show nearly the same variability.

Genetic mapping of hop (Humulus lupulus L.) applied to the detection of QTLs for alpha-acid content

Genome ◽  
2006 ◽  
Vol 49 (5) ◽  
pp. 485-494 ◽  
Author(s):  
Andreja Cerenak ◽  
Zlatko Satovic ◽  
Branka Javornik
Keyword(s):  
Acid Content ◽  
Acid Synthesis ◽  
Humulus Lupulus ◽  
Genetic Maps ◽  
Phenotypic Variance ◽  
Linkage Groups ◽  
Humulus Lupulus L ◽  
Bitter Acid ◽  
The Stability ◽  
Map Distance

The map locations and effects of quantitative trait loci (QTLs) were estimated for alpha-acid content in hop (Humulus lupulus L.) using amplified fragment length polymorphism (AFLP) and microsatellite marker (simple sequence repeat (SSR)) genetic linkage maps constructed from a double pseudotestcross. The mapping population consisted of 111 progeny from a cross between the German hop cultivar 'Magnum', which exhibits high levels of alpha-acids, and a wild Slovene male hop, 2/1. The progeny segregated quantitatively for alpha-acid content determined in 2002, 2003, and 2004. The maternal map consisted of 96 markers mapped on 14 linkage groups defining 661.90 cM of total map distance. The paternal map included 70 markers assigned to 12 linkage groups covering 445.90 cM of hop genome. QTL analysis indicated 4 putative QTLs (alpha1, alpha2, alpha3, and alpha4) on linkage groups (LGs) 03, 01, 09, and 03 of the female map, respectively. QTLs explained 11.9%–24.8% of the phenotypic variance. The most promising QTL to be used in marker-assisted selection is alpha2, the peak of which colocated exactly with the AFLP marker. Three chalcone synthase-like genes (chs2, chs3, and chs4) involved in hop bitter acid synthesis mapped together on LG04 of the female map. Saturation of the maps, particularly the putative QTL regions, will be carried out using SSR markers, and the stability of the QTLs will be tested in the coming years.Key words: Humulus lupulus L., genetic maps, alpha-acid content, QTLs.

scholarly journals New fine aroma varieties of hops (Humulus lupulus L.) Saaz Brilliant, Saaz Comfort, Saaz Shine and Mimosa

2020 ◽  
Vol 66 (4) ◽  
pp. 320-330
Author(s):  
Vladimír Nesvadba ◽  
Jitka Charvátová
Keyword(s):  
Czech Republic ◽  
Essential Oils ◽  
Acid Content ◽  
Humulus Lupulus ◽  
The Other ◽  
The Czech Republic ◽  
Humulus Lupulus L

Four new aroma hop varieties – Saaz Brilliant, Saaz Comfort, Saaz Shine and Mimosa – were registered in the Czech Republic in 2019. All of the new hop varieties have significantly higher yields than the traditional Saaz aroma variety. Saaz Comfort has the significantly highest content of alpha acids (5.59%) whereas Mimosa has the significantly lowest content of alpha acids (1.90%). The Saaz Comfort and Saaz Brilliant varieties show a variability of alpha acid content below 20%. The other hop varieties, Saaz Shine and Mimosa, as well as Saaz, have a variability of alpha acid content above 25%. Mimosa has the significantly highest content of beta acids (6.07%). Mimosa shows the highest average cohumulone content (29.29% rel.) whereas Saaz Comfort has the lowest cohumulone content (18.04% rel.). Saaz Comfort and Saaz Shine have the highest average contents of hop essential oils (0.84% w. and 0.75% w., respectively). The Saaz, Saaz Shine and Saaz Brilliant varieties show the significantly highest farnesene contents (13.47% rel., 12.50% rel. and 12.38% rel., respectively), which are higher than those of Saaz Comfort and Mimosa.

Evaluation of genetic variability of wild hops (Humulus lupulus L.) in Canada and the Caucasus region by chemical and molecular methods

Genome ◽  
2010 ◽  
Vol 53 (7) ◽  
pp. 545-557 ◽  
Author(s):  
Josef Patzak ◽  
Vladimír Nesvadba ◽  
Karel Krofta ◽  
Alena Henychova ◽  
Arkady Inalovic Marzoev ◽  
...  
Keyword(s):  
North American ◽  
Molecular Genetic ◽  
Molecular Genetic Analysis ◽  
Humulus Lupulus ◽  
Chemical Characteristics ◽  
The Caucasus ◽  
Caucasus Region ◽  
Humulus Lupulus L ◽  
Molecular Genetic Data ◽  
Simple Sequence

Wild hops ( Humulus lupulus L.) are potential new germplasms to expand the variability of genetic resources for hop breeding. We evaluated Canadian (62 plants) and Caucasian (58 plants) wild hops by their chemical characteristics and with molecular genetic analyses using sequence-tagged site and simple sequence repeat markers, in comparison with European (104 plants) and North American (27 plants) wild hops. The contents of alpha and beta acids varied from 0.36% to 5.11% and from 0.43% to 6.66% in Canadian wild hops, and from 0.85% to 3.65% and from 1.22% to 4.81% in Caucasian wild hops, respectively. The contents of cohumulone and colupulone distinctly differed between European and North American wild hops: the cohumulone level in alpha acids was in the range 46.1%–68.4% among North American wild hops and in the range 13.6%–30.6% among European wild hops. The high content of myrcene and the low contents of humulene, farnesene, and selinenes were typical for wild hops from Canada, in contrast to wild hops from the Caucasus region. We compared the chemical characteristics with molecular genetic data. Chemical characteristics differentiated wild hops into North American and Eurasian groups. Molecular genetic analysis was able to separate Caucasian wild hops from European wild hops. We proved a hop phylogeny by means of wide molecular analysis.

scholarly journals Hop (Humulus lupulus L.): Traditional and Present Use, and Future Potential

2021 ◽  
Author(s):  
Helena Korpelainen ◽  
Maria Pietiläinen
Keyword(s):  
Genetic Resources ◽  
Hormone Replacement ◽  
Humulus Lupulus ◽  
Wild Populations ◽  
Brewing Industry ◽  
Beer Brewing ◽  
Medicinal Value ◽  
Humulus Lupulus L ◽  
Future Potential ◽  
New Cultivars

AbstractHop (Humulus lupulus L.): Traditional and Present Use, and Future Potential. Hop (Humulus lupulus) is best known for its use in beer brewing owing to its bittering flavor and floral aroma. Today, the brewing industry uses as much as 98% of the produced hop crop worldwide. However, there are many other uses, some of them known since prehistoric times. Hops, the cone–like female structures called strobili, are the most frequently used part of the hop plant, but other tissues are of interest as well. The present review compiles existing knowledge of the chemical and pharmacological properties, traditional and present uses and further use potential, genetic resources, and breeding attempts in H. lupulus, and discusses climate change challenges to hop production. It contains hundreds of phytochemicals, and some of the secondary metabolites have definite potential pharmacological and medicinal value, but further investigations are desirable. Hop substances are potential alternatives, e.g., in antimicrobial, cancer, metabolic syndrome, and hormone replacement therapy treatments, as well as insecticides, preservatives, and fragrances. There are presently a few hundred cultivated hop varieties, and new cultivars are being developed and tested. Future hop breeding efforts with different quality and adaptation targets can utilize existing genetic resources, such as wild populations and landraces present in many regions.

scholarly journals Hops (Humulus lupulus L.) as a Novel Multipurpose Crop for the Mediterranean Region of Europe: Challenges and Opportunities of Their Cultivation

Agriculture ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 484
Author(s):  
Francesco Rossini ◽  
Giuseppe Virga ◽  
Paolo Loreti ◽  
Nicolò Iacuzzi ◽  
Roberto Ruggeri ◽  
...  
Keyword(s):  
Humulus Lupulus ◽  
Specific Reference ◽  
Research Activity ◽  
Plant Parts ◽  
Craft Beer ◽  
Recent Success ◽  
Natural Medicine ◽  
Humulus Lupulus L ◽  
Challenges And Opportunities ◽  
Almost All

The common hop (Humulus lupulus L.) is a dioecious perennial climbing plant, mainly known for the use of its female inflorescences (cones or, simply, “hops”) in the brewing industry. However, the very first interest towards hops was due to its medicinal properties. Actually, the variety of compounds present in almost all plant parts were (and still are) used to treat or prevent several ailments and metabolic disorders, from insomnia to menopausal symptoms as well as obesity and even cancer. Although hops are predominantly grown for hopping beer, the increasing interest in natural medicine is widening new interesting perspectives for this crop. Moreover, the recent success of the craft beer sector all over the world, made the cultivated hop come out from its traditional growing areas. Particularly, in Europe this resulted in a movement towards southern countries such as Italy, which added itself to the already existing hop industry in Portugal and Spain. In these relatively new environments, a complete knowledge and expertise of hop growing practices is lacking. Overall, while many studies were conducted globally on phytochemistry, bioactivity, and the genetics of hops, results from public research activity on basic hop agronomy are very few and discontinuous as well. The objective of this article is to provide an overview of possible uses, phenology, and agronomic aspects of hops, with specific reference to the difficulties and opportunities this crop is experiencing in the new growing areas, under both conventional and organic farming. The present review aims to fill a void still existing for this topic in the literature and to give directions for farmers that want to face the cultivation of such a challenging crop.

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