Structure and inheritance of ribosomal DNA variants in cultivated and wild hop, Humulus lupulusL.

Pillay, Michael; Kenny, S. T.

doi:10.1007/s001220050285

Cited by 10 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Our results agree with previous morphological (Small 1978), chemical , and molecular studies (Pillay and Kenny 1996;Jakše et al 2004;Murakami et al 2006aMurakami et al , 2006b) that observed high genetic variability of American accessions compared to European genotypes. In this study, genetic diversity, as measured by n A , H e and PIC, was significantly lower in European landraces and cultivars than in wild North American accessions [n A (P = 0.008); H e * Indicates highly significant difference at 95% confidence level between mean n A (P = 0.008), H e (P = 0.044), and PIC (P = 0.037) of the WA group as opposed to the EU genotypes (P = 0.044); and PIC (P = 0.037)] ( Figs.…”

Section: Genetic Diversity In European and American Hopsupporting

confidence: 96%

Genic SSRs for European and North American hop (Humulus lupulus L.)

Bassil

Gilmore

Oliphant

et al. 2008

Genet Resour Crop Evol

View full text Add to dashboard Cite

show abstract

Section: Genetic Diversity In European and American Hopsupporting

confidence: 96%

Genic SSRs for European and North American hop (Humulus lupulus L.)

Bassil

Gilmore

Oliphant

et al. 2008

Genet Resour Crop Evol

View full text Add to dashboard Cite

show abstract

“…These studies, primarily including cultivated female accessions, separated hop cultivars into European (EU) and North American (NA) hop groups, with further divisions into smaller subgroups reflecting the breeding history of particular regions or breeding centres. Cultivated and wild hops have been further differentiated on the basis of rDNA variability into native NA hop accessions, wild and cultivated Eurasian genotypes and cultivated NA accessions (Pillay and Kenny 1996). The high genetic differentiation of NA wild hops from other wild and cultivated hops has been further confirmed by microsatellite data (Jakse et al 2004).…”

Section: Introductionmentioning

confidence: 93%

Genetic structure and differentiation in hop (Humulus lupulus L.) as inferred from microsatellites

et al. 2007

View full text Add to dashboard Cite

A set of 67 wild and cultivated hop accessions, representative of hop diversity, was genotyped with 29 SSR markers in order to investigate the population structure and genetic diversity among hop genotypes. A total of 314 alleles was detected, with an average of 10.8 alleles per locus and an average PIC content of 0.607. Model-based clustering placed the accessions into five germplasm groups. A distance-based tree showed good agreement with five germplasm groups, and additionally assigned accessions omitted from model-based analysis into two additional germplasm groups. The 67 hop accessions were thus subdivided in seven germplasm groups, with three corresponding to major breeding groups and four to wild hops. This finding is in accordance with two biogeographically separated hop germplasms (European and North American origin) and with the known history of the accessions. North American hop germplasm was partitioned into native and cultivated germplasm groups. European germplasm was divided into two groups of hop cultivars representing distinguishable European germplasms and three new groups of native hops, which were differentiated for the first time by this analysis. Admixture analysis showed shares of various ancestries in hop cultivars, mostly congruent with pedigree data, and the introgression of various ancestries in some native hops. The above results have so far given the most detailed insight to date into the population structure of hop diversity, which is important for its effective use in hop breeding.

show abstract

“…Pillay and Kenny (1996) reported a difference between European and North American hops in the 18s-26s ribosomal DNA length (rDNA). Ribosomal DNA occurs in large tandem repeats, which are affected by gene conversion and unequal crossing over.…”

Section: Introductionmentioning

confidence: 99%

“…However, it has been suggested that European wild hops themselves originated from past introductions and they do not represent an autochthonous European plant (Rybáček, 1991;Moir, 2000). Little is known about the phylogenetic relationships among wild hops and their genetic variability, nor about their origin and migration routes (Neve, 1991;Pillay and Kenny, 1996;Murakami, 2000Murakami, , 2001. Phylogenetic analysis among wild hops from around the world could give insights into the evolution and domestication of hops.…”

Section: Introductionmentioning

confidence: 99%

Molecular phylogeny of wild Hops, Humulus lupulus L.

et al. 2006

View full text Add to dashboard Cite

We have analysed wild hops collected widely from the Northern Hemisphere, assessing the genetic diversity and the geographical distribution of haplotypes, to investigate the evolution and phylogeny of hops, Humulus lupulus. The haplotypes were characterized by the nuclear ribosomal DNA spacer region (length and DNA sequence) and chloroplast DNA noncoding regions (DNA sequences). The results indicated that primary divergence into European (including Caucasus and Altai hops), and Asian-North American types, was 1.0570.28 to 1.2770.30 million years ago. Although an Eastern boundary for European nuclear haplotype distribution was unclear due to the ambiguous origin of Northern Chinese samples, the European hop group showed a wide geographical distribution across Eurasia from the Altai region to Portugal. The low genetic variation in this group suggested rapid and recent expansion. The North American hop group showed high diversity, and is considered to include hops that have migrated from Asia. Japanese and Chinese hops were identified as genetically distinct. This study has shown that wild hops in each growing region are genetically differentiated with considerable genetic diversity. It gives insights into the evolution and domestication of hops that are discussed.

show abstract

Structure and inheritance of ribosomal DNA variants in cultivated and wild hop, Humulus lupulusL.

Cited by 10 publications

References 0 publications

Genic SSRs for European and North American hop (Humulus lupulus L.)

Genic SSRs for European and North American hop (Humulus lupulus L.)

Genetic structure and differentiation in hop (Humulus lupulus L.) as inferred from microsatellites

Molecular phylogeny of wild Hops, Humulus lupulus L.

Contact Info

Product

Resources

About