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Genetic structure and diversity of a collection of Brassica rapa subsp. rapa L. revealed by simple sequence repeat markers

Published online by Cambridge University Press:  24 February 2011

P. SOENGAS ,
M. E. CARTEA ,
M. FRANCISCO ,
M. LEMA  and
P. VELASCO
P. SOENGAS*
Affiliation:
Misión Biológica de Galicia (CSIC), PO Box 28, E-36080·Pontevedra, Spain
M. E. CARTEA
Affiliation:
Misión Biológica de Galicia (CSIC), PO Box 28, E-36080·Pontevedra, Spain
M. FRANCISCO
Affiliation:
Misión Biológica de Galicia (CSIC), PO Box 28, E-36080·Pontevedra, Spain
M. LEMA
Affiliation:
Misión Biológica de Galicia (CSIC), PO Box 28, E-36080·Pontevedra, Spain
P. VELASCO
Affiliation:
Misión Biológica de Galicia (CSIC), PO Box 28, E-36080·Pontevedra, Spain
*
*To whom all correspondence should be addressed. Email: psoengas@mbg.cesga.es
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Summary

Brassica rapa subsp. rapa L. includes three different crops: turnips (roots), turnip greens (leaves) and turnip tops (inflorescences). A collection of B. rapa subsp. rapa from north-western Spain is currently kept at ‘Misión Biológica de Galicia’ (a research centre of the Consejo Superior de Investigaciones Científicas (CSIC), Spain). This collection has been characterized based on morphological and agronomical traits. A better understanding of the genetic diversity present in the collection is necessary in order to optimize its use and maintenance. The objectives of the present work were to assess the genetic diversity present in the B. rapa subsp. rapa collection, to establish genetic relationships among populations and to study the genetic structure of the collection. Eighty populations were analysed based on 18 simple sequence repeats (SSRs). Populations showed a broad range of genetic diversity, thus offering good potential for further genetic improvement. Most of the variability was found within the population level, probably due to high rates of allogamy, to migration and/or interchange of seed among local growers. Populations showed a low level of differentiation, grouping in just one cluster, and therefore they can be considered as samples of a highly variable metapopulation that can be used for B. rapa breeding programmes.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 149 , Issue 5 , October 2011 , pp. 617 - 624
Copyright
Copyright © Cambridge University Press 2011

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