scholarly journals Allelic variations at Dhn4 and Dhn7 are associated with frost tolerance in barley

2010 ◽  
Vol 46 (No. 4) ◽  
pp. 149-158 ◽  
Author(s):  
L. Holková ◽  
P. Mikulková ◽  
P. Hrstková ◽  
I.T. Prášil ◽  
M. Bradáčová ◽  
...  
Keyword(s):  
Genetic Linkage ◽  
Segregation Analysis ◽  
Growth Habit ◽  
Frost Tolerance ◽  
Allelic Combination ◽  
Winter Type ◽  
Spring Variety ◽  
Allelic Variations ◽  
Derivatives Of ◽  
Allele Combination

The sequences of the closely linked barley dehydrin genes Dhn4 and Dhn7 are both known to vary allelically. Here we associated allelic constitution at Dhn4/7 with frost sensitivity across a panel of 30 diverse barley varieties. The combined presence of a 6 bp insertion in exon1 of Dhn4 and a 30 bp deletion in exon1 of Dhn7 was restricted to six-rowed winter and intermediate varieties characterised by relatively higher frost tolerance (12 genotypes; LT<sub>50</sub> from &ndash;14.2&deg;C to &ndash;15.6&deg;C). The alternative combination was present with one exception (sixrowed winter variety Alissa) only in spring and two-rowed winter varieties (17 genotypes; LT<sub>50</sub> from &ndash;10.0&deg;C to &ndash;14.3&deg;C). The genetic linkage between Dhn4 and Dhn7 identified e.g. in Dictoo and Morex varieties was verified by segregation analysis of F<sub>2</sub> plants from a cross between two genotypes carrying different allelic combination of Dhn4 and Dhn7 genes (two-rowed spring variety Akcent &times; six-rowed winter variety Okal). The potential of the former allelic combination as a marker for enhanced frost tolerance was tested in a sample of F<sub>5</sub> derivatives of a cross between the two-rowed winter type variety Monaco (Akcent allele combination) and the six-rowed winter type variety Okal. Plants with the Okal allele combination showed significantly higher frost tolerance than those with the alternative growth habit. The effect of ear type on frost tolerance was insignificant.

Development of a molecular genetic linkage map for Colletotrichum lindemuthianum and segregation analysis of two avirulence genes

2006 ◽  
Vol 51 (2) ◽  
pp. 109-121 ◽  
Author(s):  
Francisco Luna-Martínez ◽  
Raúl Rodríguez-Guerra ◽  
Mayra Victoria-Campos ◽  
June Simpson
Keyword(s):  
Linkage Map ◽  
Genetic Linkage ◽  
Segregation Analysis ◽  
Genetic Linkage Map ◽  
Molecular Genetic ◽  
Colletotrichum Lindemuthianum ◽  
Avirulence Genes

scholarly journals Allelic variations at the HvSNF2 and HvBM5 loci are associated with the heading date and growth habit of barley (Hordeum vulgare L.) under a semi-arid climate

2021 ◽  
Author(s):  
Salem Marzougui
Keyword(s):  
Growth Habit ◽  
Allelic Variation ◽  
Heading Date ◽  
Arid Climate ◽  
Hordeum Vulgare L ◽  
Pcr Product ◽  
Speed Up ◽  
Primer Sets ◽  
Allelic Variations ◽  
Semi Arid

The heading date and growth habit are key factors that regulate the transition from the vegetative to the reproductive stage in barley. In this study, we used PCR based markers to identify the allelic variations in the Vrn-H1 (HvMB5) and Vrn-H2 (HvSNF2) genes and to predict the heading date and growth habit of a collection of Tunisian barley assessed under a semi-arid climate. The allelic variation at HvBM5 revealed two PCR fragments at 830 and 344 bp. Primer sets used to amplify the HvSNF2 gene have resulted in different alleles size of 543, 623, and 700 bp. Different allelic combinations of HVBM5 and HvSNF2 were associated with the heading date and growth habit. The spring and early heading accessions were only characterised by the amplification of the HvSNF2 fragment at 700 bp. All the winter accessions yielded the PCR product HvBM5 at 830 bp, but the variation in the heading date was determined by the HvSNF2 alleles. These DNA markers will be a powerful tool to predict the heading date and growth habit and can be used as markers for the assisted selection to speed up the national breeding programme.

Inheritance of male hybrid sterility in the house musk shrew (Suncus murinus, Insectivora, Soricidae)

Genome ◽  
1998 ◽  
Vol 41 (6) ◽  
pp. 825-831 ◽  
Author(s):  
Tatiana I Axenovich ◽  
Margarita B Rogatcheva ◽  
Sen-ichi Oda ◽  
Pavel M Borodin
Keyword(s):  
Male Sterility ◽  
Segregation Analysis ◽  
Hybrid Sterility ◽  
Suncus Murinus ◽  
Pedigree Data ◽  
Musk Shrew ◽  
Single Allele ◽  
Male Hybrid ◽  
Allele Combination

Two geographic races of the house musk shrew (Suncus murinus) were crossed and intercrossed in the laboratory. Many cases of male sterility were detected among the hybrids. Segregation analysis of the pedigree data showed that the inheritance of male sterility in interracial hybrids of S. murinus can be described within the framework of monogene polyallele model with sterility of a single allele combination. This model is similar if not identical to that proposed by Dobzhansky and Muller.Key words: hybrid sterility, segregation analysis, spermatogenesis, shrew, Suncus murinus.

scholarly journals Tree species for sheltering hill pasture: some establishment results from a North Canterbury site

1990 ◽  
pp. 69-74
Author(s):  
J.W. Sturrock
Keyword(s):  
Tree Species ◽  
Growth Habit ◽  
Robinia Pseudoacacia ◽  
Species Hybrid ◽  
North West ◽  
Seasonally Dry ◽  
Pests And Diseases ◽  
Acacia Species ◽  
Successful Establishment ◽  
Derivatives Of

Species of Eucalyptus, Acacia, Robinia pseudoacacia, and 8 clonal derivatives of 3 species of hybrid cypresses were planted as a one-row shelterbelt on an exposed, unimproved and seasonally dry pasture in North Canterbury. Plots were single trees, replicated 4 times. The trial is located at 500 m altitude on a sunny, 30" slope exposed to north-west Fohn winds. Supplementary water, essential on such country, was applied initially to aid establishment. The performance of the 19 species and clones 4.5 years after planting is reported, based on survival, height growth, habit, and resistance to pests and diseases. Species are classed as 'acceptable', 'promising' and 'unsuitable', and include both tall (dominant) and complementary or 'infiller' shelter species. Currently, favourable species include Eucalyptus gunnii, E. nicholii and possibly E. tennairamis as dominants, and Acacia floribunda and x Cupressocyparis leylandii 'Leighton Green' as infillers. The importance of management for successful establishment and maintenance of effective shelter is stressed. Keywords shelter, drought, hill pasture, shelter tree species, tree clones, Euca!yptus species, Acacia species, Robinia pseudoacacia, x Cupressocypark species, hybrid cypresses, shelter management

Inheritance of growth habit detected by genetic linkage analysis using microsatellites in the common bean (Phaseolus vulgaris L.)

2010 ◽  
Vol 27 (4) ◽  
pp. 549-560 ◽  
Author(s):  
Tatiana de Campos ◽  
Paula Rodrigues Oblessuc ◽  
Danilo Augusto Sforça ◽  
Juliana Morini Kupper Cardoso ◽  
Renata Moro Baroni ◽  
...  
Keyword(s):  
Phaseolus Vulgaris ◽  
Linkage Analysis ◽  
Common Bean ◽  
Genetic Linkage ◽  
Growth Habit ◽  
Genetic Linkage Analysis ◽  
Phaseolus Vulgaris L ◽  
The Common

scholarly journals Winter-hardy Mammoth™ Series Garden Chrysanthemums ‘Red Daisy’, ‘White Daisy’, and ‘Coral Daisy’ Sporting a Shrub Plant Habit

HortScience ◽  
2008 ◽  
Vol 43 (3) ◽  
pp. 648-654 ◽  
Author(s):  
Neil Anderson ◽  
Peter Ascher ◽  
Esther Gesick ◽  
Lee Klossner ◽  
Neal Eash ◽  
...  
Keyword(s):  
North American ◽  
Interspecific Hybrids ◽  
Frost Tolerance ◽  
Department Of Agriculture ◽  
Herbaceous Perennials ◽  
Seed Company ◽  
The North ◽  
Plant Habit ◽  
Plant Patents ◽  
Derivatives Of

Three new Chrysanthemum ×hybrida, garden chrysanthemum cultivars: Red Daisy, White Daisy, and Coral Daisy, are the first in the Mammoth™ series that are advanced interspecific hybrids derived from an open-pollinated cross between hexaploid C. weyrichii (Maxim.) Tzvelv. × C. ×grandiflora Tzvelv. These cultivars are backcross or inbred derivatives of the original interspecific F1 hybrids. All three cultivars are U.S. Department of Agriculture Z3b (−34.4 °C to −37.2 °C) winter-hardy herbaceous perennials exhibiting a shrub habit with the cushion phenotype. Additional traits exhibited by these three cultivars are butterfly attractants, frost tolerance of the flowers, and genetic ‘self-pinching.’ These Mammoth™ cultivars are clonally propagated, virus indexed, protected by U.S. Plant Patents and Canadian Plant Breeder's Rights, and are available from the North American exclusive licensee Ball Seed Company.

Scanning Transmission Electron Microscopy of Polyethylene Crystals

1980 ◽  
Vol 38 ◽  
pp. 242-245
Author(s):  
F. Khoury ◽  
L. H. Bolz
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Crystallization Temperature ◽  
Scanning Transmission Electron Microscopy ◽  
Growth Habit ◽  
Lateral Growth ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Growth Habits

The lateral growth habits and non-planar conformations of polyethylene crystals grown from dilute solutions (<0.1% wt./vol.) are known to vary depending on the crystallization temperature.1-3 With the notable exception of a study by Keith2, most previous studies have been limited to crystals grown at <95°C. The trend in the change of the lateral growth habit of the crystals with increasing crystallization temperature (other factors remaining equal, i.e. polymer mol. wt. and concentration, solvent) is illustrated in Fig.l. The lateral growth faces in the lozenge shaped type of crystal (Fig.la) which is formed at lower temperatures are {110}. Crystals formed at higher temperatures exhibit 'truncated' profiles (Figs. lb,c) and are bound laterally by (110) and (200} growth faces. In addition, the shape of the latter crystals is all the more truncated (Fig.lc), and hence all the more elongated parallel to the b-axis, the higher the crystallization temperature.

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