NDLI: The effect of genebank seed increase on the genetics of recently collected potato (Solanum) germplasm

Content Provider	Springer Nature Link
Author	Rio, A. H. Bamberg, J. B.
Copyright Year	2003
Abstract	In previous work at the US Potato Genebank, RAPDs were used to detect large differences between genebank-conserved samples and their correspondingin situ populations re-collected from the wild. This work investigates one possible explanation for these differences: a large genetic change in the sample when it undergoes “domestication” by a forced sexual seed increase and subsequent adaptation to cultivation in the genebank. However, when 11Solanum fendleri and 17S. jamesii populations were collected from the wild and compared to their sexual progeny generated at the genebank, no significant differences in RAPD finger-prints were detected. These results show that theory of “genebank domestication” is not supported. However, when plants of one pair of populations were tested individually, the seed increase population was significantly more heterogeneous than its clonally collectedin situ parents. Thus, while genebank populations have the same genes as their wild counterparts, they may contain genotypes not present in the wild.En trabajos previos llevados a cabo en el Banco de Germoplasma de Papa de los Estados Unidos, el análisis de RAPDs encontró que existian diferencias genéticas extremas entre el material preservado en el Banco y sus poblaciones correspondientesin situ; las cuales fueron recolectadas de sus habitats naturales. El presente estudio investigó una posible explicación a estas diferencias: la posibilidad que haya ocurrido un cambio genético drástico debido a la “domesticacion” de estas poblaciones cuando fueron forzadas a reproducirse sexualmente y su posterior adaptación para cultivación en el Banco. Sin embargo, cuando 11 poblaciones deSolanum fendleri y 17 deS. jamesii fueron recolectadas de sus sitios originales y comparadas con sus progenies generadas sexualmente en el Banco, el analisis de RAPDs demostró que no habia ninguna diferencia significativa. Estos resultados no respaldan la teoria de “domesticación en el Banco”. Sin embargo, el análisis de plantas individuales en un par de poblaciones demostró que la población generada para multiplición de semillas fue mas heterogénea que su población parental recolectadain situ. Por lo tanto, a pesar que las poblaciones preservadas en el Banco poseen los mismos genes que sus correspondientes poblaciones en habitats naturales, estas pueden expresar genotipos que no se observan en sus habitats originales.
Starting Page	215
Ending Page	218
Page Count	4
File Format	PDF
ISSN	1099209X
Journal	American Potato Journal
Volume Number	80
Issue Number	3
e-ISSN	18749380
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-01-01
Publisher Institution	Potato Association of America
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Life Sciences Plant Sciences Animal Genetics and Genomics Agriculture Plant Physiology Plant Pathology
Content Type	Text
Resource Type	Article
Subject	Plant Science Agronomy and Crop Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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