Establishing and validating a core collection in Cuban potato germplasm
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Abstract
morphoagronomic characterization data of 351 accessions of
wild species and cultivated varieties from Cuban germplasm
bank were used to establish and validate a core collection.
Qualitative and quantitative characters related to tuber, crop
behaviour vs. Alternaria solani and PLRV were evaluated.
The main component and cluster analyses were based on the
square Euclidean distance matrix for group selection. Means,
standard deviations, variation ranges and coefficients of the
cluster were calculated for quantitative characters, as well as
the state appearance frequencies of qualitative attributes and
Alternaria solani and PLRV occurrence. Core collection was
selected by a stratified sampling, also having in mind the
geographic origin of accessions. Results enabled to establish
and validate a core collection in Cuban potato germplasm,
adequately representing 21.9 % of base collection; therefore,
maximizing both qualitative and quantitative characters. An
appropriate geographical distribution was observed when core
collection accessions are derived from eight out of the nine
countries of origin.
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