caa a22 4500 475794818 CHVBK 20180406123721.0 cr unu---uuuuu 170329e20000701xx s 000 0 eng 10.1007/s001220051468 doi (NATIONALLICENCE)springer-10.1007/s001220051468 Assessment of genetic diversity in three subsets constituted from the ICRISAT sorghum collection using random vs non-random sampling proceduresA. Using morpho-agronomical and passport data [Elektronische Daten] A. Using morpho-agronomical and passport data [C. Grenier, P. J. Bramel-Cox, M. Noirot, K. E. Prasada Rao, P. Hamon] Abstract : A large collection, such as the sorghum [Sorghum bicolor (L.) Moench] landrace collection held at the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), represents a challenge for the maintenance of both the accessions of and the information documented for the germplasm collection. The accessibility and knowledge of the landrace collection are the essential factors for an efficient utilization of the genetic resources by both breeders and farmers. Different sampling strategies, either random or non-random, were proposed to obtain subsets of reduced size (core collection). Three subsets were established; a random sampling within a stratified collection (logarithmic strategy: L); a sample based upon morpho-agronomic diversity (principal component score strategy: PCS); and a sample based upon an empirical knowledge of sorghum (taxonomic strategy: T). Comparisons of these three samples for morpho-agronomic characterization and passport information were assessed to determine their impact on phenotypic diversity. For their overall diversity, the three subsets did not differ, as shown with the two-dimensional representation of the morpho-agronomic diversity and the Shannon-Weaver diversity indices. When comparisons for morpho-agronomic and passport data were considered, the PCS subset looked similar to the entire landrace collection. The L subset showed differences for characters associated with the photoperiod reaction that was considered in the stratification of the collection. The T subset was the most distinct from the entire landrace collection as it over-represented the landraces selected by farmers for specific uses and covered the widest range of geographical adaptation and morpho-agronomic characteristics. Springer-Verlag Berlin Heidelberg, 2000 Key words Core collection nationallicence Sorghum nationallicence Morpho-agronomic diversity nationallicence Sampling strategies nationallicence Grenier C. CIRAD, TA 70/03, Avenue Agropolis, F-34398 Montpellier cedex 5, France Fax: +33(0)467615509 e-mail: grenier@cirad.fr, FR aut Bramel-Cox P. J. International Crops Research Institute for the Semi-Arid Tropics, Patancheru, 502 324 A.P., India, IN aut Noirot M. Institut de Recherche pour le Developpement (IRD), BP 5045, 34032 Montpellier Cedex 1, France, FR aut Prasada Rao K. E. Academy of Biological Sciences, Visakhpatnam, 530 020 A.P., India, IN aut Hamon P. Université Montpellier III/IRD, route de Mende, 34199 Montpellier Cedex 5, France, FR aut https://doi.org/10.1007/s001220051468 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s001220051468 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Grenier C. CIRAD, TA 70/03, Avenue Agropolis, F-34398 Montpellier cedex 5, France Fax: +33(0)467615509 e-mail: grenier@cirad.fr, FR aut NATIONALLICENCE 700 1- Bramel-Cox P. J. International Crops Research Institute for the Semi-Arid Tropics, Patancheru, 502 324 A.P., India, IN aut NATIONALLICENCE 700 1- Noirot M. Institut de Recherche pour le Developpement (IRD), BP 5045, 34032 Montpellier Cedex 1, France, FR aut NATIONALLICENCE 700 1- Prasada Rao K. E. Academy of Biological Sciences, Visakhpatnam, 530 020 A.P., India, IN aut NATIONALLICENCE 700 1- Hamon P. Université Montpellier III/IRD, route de Mende, 34199 Montpellier Cedex 5, France, FR aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 475794818 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer