TITLE

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

AUTHOR(S)
Tang, Shunxue; Knapp, Steven J.
PUB. DATE
April 2003
SOURCE
Theoretical & Applied Genetics;Apr2003, Vol. 106 Issue 6, p990
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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.
ACCESSION #
15724192

 

Related Articles

  • Divergent patterns of allelic diversity from similar origins: the case of oilseed rape (Brassica napus L.) in China and Australia. Chen, S.; Nelson, M. N.; Ghamkhar, K.; Fu, T.; Cowling, W. A. // Genome;Jan2008, Vol. 51 Issue 1, p1 

    Oilseed rape (Brassica napus) in Australia and China have similar origins, with introductions from Europe, Canada, and Japan in the mid 20th century, and there has been some interchange of germplasm between China and Australia since that time. Allelic diversity of 72 B. napus genotypes...

  • Genetic Diversity and Core Collection Evaluations in Common Wheat Germplasm from the Northwestern Spring Wheat Region in China. Hao, C. Y.; Zhang, X. Y.; Wang, L. F.; Dong, Y. S.; Shang, X. W.; Jia, J. Z. // Molecular Breeding;Jan2006, Vol. 17 Issue 1, p69 

    Fluorescence microsatellite markers were employed to reveal genetic diversity of 340 wheat accessions consisting of 229 landraces and 111 modern varieties from the Northwest Spring Wheat Region in China. The 340 accessions were chosen as candidate core collections for wheat germplasm in this...

  • Application of Microsatellite Markers to Fingerprint and Determine the Representational Diversity within a Recently Established Elite Maize Inbred Line Breeding Program. Nguyen, Truong Van; Doan, Thao T. B.; Leo, Audrey E.; Bui, Cuong Manh; Taylor, Paul W. J.; Ford, Rebecca // Journal of Agricultural Science (1916-9752);Jun2012, Vol. 4 Issue 6, p258 

    This study focused on the implementation of microsatellite markers to determine the diversity among elite inbred lines representing the Vietnamese maize breeding program. Genetic relationships were assessed using twenty loci to gain an understanding of the width of the program compared to other...

  • Decide what you need in seed. Flint, Josh // Prairie Farmer;Sep2011, p46 

    The article offers suggestions related to seed selection and states that genetics of a seed should be preferred over traits because traits only protect the inherent yield, and that one should upgrade to the latest technology whenever necessary with the required properties in the seed. INSET:...

  • What do you need in seed? Flint, Josh // Wisconsin Agriculturist;Dec2011, Vol. 242 Issue 12, p42 

    The article reports on the significance of considering the genetics during seed selection.

  • Quantitative genetics of intraspecies hybrids. Gordon, Ian L. // Heredity;Dec99, Vol. 83 Issue 6, p757 

    Quantitative genetics generally is based on the properties of the randomly fertilized (RF) population or inbred derivatives of it. Simple hybrids and hybrid swarms do not conform to this model; and only some properties of hybrid means appear to have been available. In this paper, several...

  • 5 seed-buying tips. TONNESON, LON // Dakota Farmer;Nov2011, p27 

    The article offers tips on seed buying such as purchasing certified seeds, choosing the right variety for the farm, and being aware of the genetics of the seed.

  • Molecular characterization and genetic structure of Quercus acutissima germplasm in China using microsatellites. Zhang, Yuanyan; Fang, Yanming; Yu, Mukui; Li, Xuexia; Xia, Tao // Molecular Biology Reports;Jun2013, Vol. 40 Issue 6, p4083 

    Quercus acutissima is native to eastern Asia. It has a wide distribution in China and China is an important component in understanding the ecology and genetic structure of this species. Q. acutissima attained high economic value for hardwood product and can be managed as an energy tree species....

  • Genetic Diversity in Iranian Chickpea (Cicer arietinum L.) Landraces as Revealed by Microsatellite Markers. NAGHAVI, MOHAMMAD REZA; MONFARED, SAJAD RASHIDI; HUMBERTO, GOMEZ // Czech Journal of Genetics & Plant Breeding;2012, Vol. 48 Issue 3, p131 

    To estimate the genetic diversity of chickpea germplasm from Iran, a total of 307 landraces from 4 regions including: northern areas (29 from Ardebil, 3 from Qazvin and 5 from Mazanderan provinces), temperate (16 from Kermanshah, 2 from Semnan, 54 from Khorasan and 20 from Kerman provinces),...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics