Millennium—A New Hop Variety

Probasco, Gene; Varnum, Scott; Hysert, D. W.

doi:10.1094/asbcj-64-0155

Cited by 2 publications

(6 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The literature on hop lacks reports on the morphological traits of triploids. Most of manuscripts have focused on yield potential, yield chemistry as well as flavor attributes (Beatson et al 2003, Beatson and Alspach 2007, Probasco et al 2006. In this trial, triploids were characterized by significant differences in their morphological features, which is a result of their hybrid character.…”

Section: Discussionmentioning

confidence: 99%

“…Attempts to grow triploid hops (2n = 3x = 30) were made in the United States as early as in the 1970s (Haunold 1971). The majority of triploid cultivars were obtained by controlled or free pollination of tetraploid female forms with diploid male pollen 4x × 2x (Beatson et al 2003, Beatson and Alspach 2007, Probasco et al 2006. A few were obtained in offspring from free pollination of triploid forms with diploid pollen 3x × 2x (Beatson and Alspach 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, author observed an increase in the content of soft resins in triploid cones together with an increase in the size of their lupulin glands. Probasco et al (2006) stated that the alpha acids content in the cones of the triploid cultivar 'Millenium' was 2.5% higher than that of the maternal diploid cultivar 'Nugget'. Similarly, the concentration of certain components of essential oils, such as humulene and carriophilene, which give beer its characteristic aroma, was also higher.…”

Section: Introductionmentioning

confidence: 99%

“…The triploid 'Nelson Sauvin' showed a higher yield than the diploid commercial cultivars 'Green Bullet' and 'Nugget'. Probasco et al (2006) reported that the triploid cultivar 'Millenium' had a yield higher by 560.7 kg than the diploid 'Nugget'. As far as we know there are no reports regarding an assessment of the morphological traits that characterize triploids.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Ploidy variation and agronomic performance of F1 hybrids of tetraploid and diploid forms of Humulus lupulus L.

Trojak‐Goluch

Skomra

2020

Breed. Sci.

View full text Add to dashboard Cite

Humulus lupulus (2n = 2x = 20) as a source of hop resins, essential oils and polyphenols has value in brewing, pharmacy and cosmetology. Conventional crossing between tetraploids of 'Sybilla' and diploid males were performed to obtain F 1 hybrids. Cytological studies revealed that 83.8% of the hybrids were triploids (2n = 3x = 30), 15.2% were aneuploids in which the chromosome number ranged from 28-32. Tetraploids (2n = 4x = 40) and diploids were also observed, which indicates numerous disturbances of gametogenesis of the parental forms. STS markers specific for male plants showed that females outnumbered male individuals among the F 1 hybrids, which is in accordance with the distribution of sex ratio characteristic for diploid hybrids of H. lupulus. Female triploids were compared to the control 'Sybilla' with regard to their functional characteristics and alpha acids content in cones. A two year-long experiment showed that most of the triploids had a significantly higher position of fructiferous branches and shoot twist index compared to diploids of 'Sybilla'. There was also a significantly extended time for them to reach technological maturity of cones. Triploids were distinguished by a significantly lower seed content compared to 'Sybilla', therefore the raw material obtained from them is more suitable for the production of hop pellets and extracts.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ploidy variation and agronomic performance of F1 hybrids of tetraploid and diploid forms of Humulus lupulus L.

Trojak‐Goluch

Skomra

2020

Breed. Sci.

View full text Add to dashboard Cite

show abstract

“…For many industrial plants, including hops, the most favourable form of ploidy is three sets of chromosomes in the genome. Hop triploids are characterised by greater vigour and higher yields compared to diploids [88,119]. In addition, they exhibit a higher shoot twist index, which allows them to climb up on wires and fix on them better.…”

Section: Species Morphological Traits Ploidy Referencesmentioning

confidence: 99%

Polyploidy in Industrial Crops: Applications and Perspectives in Plant Breeding

et al. 2021

View full text Add to dashboard Cite

Polyploidisation is an important process in the evolution of many plant species. An additional set of chromosomes can be derived from intraspecific genome duplication (autopolyploidy) or hybridising divergent genomes and chromosome doubling (allopolyploidy). Special forms of polyploidy are autoallopolyploidy and segmental allopolyploidy. Polyploidy arises from two basic processes: spontaneously occurring disturbances of meiotic division and induced by antimitotic agents’ disruption of mitosis. The first involves the induction and fusion of unreduced gametes, resulting in the formation of triploids and tetraploids. The second process uses antimitotics that disrupt cellular microtubules and prevent chromosome’s sister chromatids motion during anaphase. Colchicine, oryzalin, and trifluralin are the most commonly used antimitotics for inducing polyploids in plants. The exposure time and concentration of the antimitotics and the species, cultivar, genotype, and tissue type affect the efficiency of genome duplication. Polyploids are distinguished from diploids by increased cell size and vegetative parts of plants and increased content of secondary metabolites. Genome duplication generates several changes at the epigenetic level resulting in altered gene expression. Polyploidisation is used in plant breeding to overcome the non-viability and infertility of interspecific hybrids, obtain seedless polyploid cultivars and increase resistance/tolerance to biotic and abiotic factors.

show abstract

Millennium—A New Hop Variety

Cited by 2 publications

References 4 publications

Ploidy variation and agronomic performance of F<sub>1</sub> hybrids of tetraploid and diploid forms of <i>Humulus lupulus</i> L.

Ploidy variation and agronomic performance of F<sub>1</sub> hybrids of tetraploid and diploid forms of <i>Humulus lupulus</i> L.

Polyploidy in Industrial Crops: Applications and Perspectives in Plant Breeding

Contact Info

Product

Resources

About