Relations between heterosis and enzymatic polymorphism in populations of cultivated sunflowers (Helianthus annuus L.)

Tersac, Michel; Blanchard, Philippe; Brunel, Dominique; Vincourt, Patrick

doi:10.1007/bf00222393

Cited by 15 publications

(5 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The ancestral history of oilseed germplasm originating in the post-CMS era has been reconstructed using pedigree records (Korell et al 1992), coancestry analysis (Cheres and Knapp 1998) and phylogenetic analyses based on a variety of molecular markers (Gentzbittel et al 1992(Gentzbittel et al , 1994Quillet et al 1992;Berry et al 1994;Lawson et al 1994;Tersac et al 1994;Hongtrakul et al 1997;Paniego et al 2002;Yu et al 2002a). Typically, elite oilseed fertility restorer (R) and sterility maintainer (B) lines coalesce into distinct clades.…”

Section: Introductionmentioning

confidence: 99%

Microsatellites uncover extraordinary diversity in native American land races and wild populations of cultivated sunflower

2003

View full text Add to dashboard Cite

The contemporary oilseed sunflower (Helianthus annuus L.) gene pool is a product of multiple breeding and domestication bottlenecks. Despite substantial phenotypic diversity, modest differences in molecular genetic diversity have been uncovered in anciently and recently domesticated sunflowers. The paucity of molecular marker polymorphisms in early analyses led to the hypothesis of a single domestication origin. Phylogenetic analyses were performed on 47 domesticated and wild germplasm accessions using 122 microsatellite loci distributed throughout the sunflower genome. Extraordinary allelic diversity was found in the Native American land races and wild populations, and progressively less allelic diversity was found in germplasm produced by successive cycles of domestication and breeding. Of 1,341 microsatellite alleles, 489 were unique to land races, exotic domesticates and wild populations, whereas only 15 were unique to elite inbred lines. The number of taxon-specific alleles was 35-fold greater among wild populations (26.27) than elite inbred lines (0.75). Microsatellite genotyping uncovered the possibility of multiple domestication origins. Land races domesticated by Native Americans of the southwestern US (Hopi and Havasupai) formed a clade independent of land races domesticated by Native Americans of the Great Plains and eastern US (Arikara and Seneca). Predictably, domestication and breeding have ratcheted genetic diversity down in sunflower. The contemporary oilseed sunflower gene pool, while not imperiled, could profit from an infusion of novel alleles from the reservoir of latent genetic diversity present in wild populations and Native American land races.

show abstract

Section: Introductionmentioning

confidence: 99%

Microsatellites uncover extraordinary diversity in native American land races and wild populations of cultivated sunflower

2003

View full text Add to dashboard Cite

show abstract

“…A relationship between country or region of origin and genotypic or allelic frequencies has been observed in a wide range of plants, both cultivated and wild, for example, in sorghum (Morden et al 1990), lentil (Erkine and Muehlbauer 1991), wheat (Asins and Carbonell 1989), chickpea (Tuwafe et al 1988), cotton (Percy and Wendel 1990), sunflower (Tersac et al 1994) and trees such as chestnut (Huang et al 1994), date palm (Bennaceur et al 1991) and beech (Comps et al 1990). The causes of these relationships are subject of debate.…”

Section: Resultsmentioning

confidence: 98%

Geographic variation for isozymes in cherimoya (Annona cherimola Mill.)

Perfectti

Pascual

2005

Genet Resour Crop Evol

View full text Add to dashboard Cite

Cherimoya (Anonna cherimola Mill.) is a fruit tree which originated in Peru and Ecuador and is now cultivated in several subtropical areas of the world. The characterization of cherimoya cultivars at allozyme level has been previously reported, but the geographic distribution and organization of this variation have not been fully characterized. In this study, we assessed the relationships among 206 cherimoya and four atemoya (A. cherimola Â A. squamosa) cultivars based on allozyme polymorphism. We have confirmed the genetic differences between atemoya and cherimoya cultivars, and showed that cherimoya accessions from Madeira, Bolivia and Spain form homogeneous groups of cultivars. Accessions from Chile and California form heterogeneous groups, probably due to their mixed origins. Cultivars from Peru and Ecuador showed a wide range of allelic variation, as is expected for accessions from the center of origin of this species.

show abstract

“…Во всех исследованиях, проведенных на кукурузе, классификация групп, определенная на основе молекулярной информации, согласовывалась с традиционной классификацией пребридинговых гетерозисных групп [44,114,115,152,226,259,260]. Такие же результаты были получены и на подсолнечнике [147,376]. А работа, выполненная на кукурузе [114], проиллюстрировала дивергенцию между американскими и европейскими кремнистыми линиями этой культуры.…”

Section: применение методов классификации: гетерозисные группы и упраunclassified

Molecular markers in population genetics and breeding of cultivated plants

Чесноков¹,

Chesnokov

Kocherina³

et al. 2019

View full text Add to dashboard Cite

Information on the use of molecular and traditional genetic markers in population genetics and breeding of agricultural plants is presented. An assessment of the level of diversity in populations is given using different types of markers, both at the level of alleles and at the level of individual nucleotides, including the measurement of differentiation within different marker systems. The relationship between molecular divergence, phenotypic divergence and co-origin described. The factors affecting the reliable determination of quantitative trait loci highlighted. Special attention is paid to the mapping of Mendelian genes. Special attention paid to the physiological and biochemical characteristics and their role in the manifestation and identification of economically valuable properties of cultivated plant species. Information is provided on the main hardware and software commonly used to conduct statistical calculations and establish a disequilibrium of marker/trait linking in populations. The purpose of the main computer programs, the most widely used for genetic mapping and establishing a marker / trait association, is briefly discussed.

show abstract

Relations between heterosis and enzymatic polymorphism in populations of cultivated sunflowers (Helianthus annuus L.)

Cited by 15 publications

References 11 publications

Microsatellites uncover extraordinary diversity in native American land races and wild populations of cultivated sunflower

Microsatellites uncover extraordinary diversity in native American land races and wild populations of cultivated sunflower

Geographic variation for isozymes in cherimoya (Annona cherimola Mill.)

Molecular markers in population genetics and breeding of cultivated plants

Contact Info

Product

Resources

About