Articles
REVISION OF A PRIMARY CORE COLLECTION OF PERSIMMON (DIOSPYROS KAKI THUNB.) ORIGINATED IN CHINA
Article number
996_29
Pages
213 – 217
Language
English
Abstract
As one of the origins of persimmon (Diospyros kaki Thunb.), China has the most abundant genetic resources.
However, they have not been conserved and evaluated effectively, thereby it results in poor use.
A core collection is an efficient approach to solve the above problems.
A core collection should be dynamic and revised because of a living record of germplasms.
There is no report on revisions of core collection for perennial fruit trees.
In our study, a primary core collection of persimmon originated in China was revised based on a previous one that was developed using 19 morphological characters of 558 accessions recorded in the 1980s.
Firstly, a new primary core collection was developed using 14 morphological characters of 294 accessions recorded in CGRIS website available in 2006. Based on three stepwise clustering methods including centroid, Wards and UPGMA method and four sample ratios including 10, 30, 50 and 70% of the entire collection, 12 different primary core collections were compared in order to acquire an appropriate primary core collection.
A new primary core collection including 92 accessions was defined as the appropriate one with sample ratio of 30% (92 accessions) and clustering by UPGMA method.
Secondly, those accessions not only in the previous collection but also in the new one would be directly selected to the ultimate core collection.
There were 52 accessions available in both primary core collections.
Thirdly, 65 accessions were selected by comparing records at different time.
Finally, the revised primary core collection included 117 accessions.
All accessions were conserved in National Persimmon Germplasm Repository, Yangling in vivo.
This would provide an example for the revision of other fruit tree core collections.
However, they have not been conserved and evaluated effectively, thereby it results in poor use.
A core collection is an efficient approach to solve the above problems.
A core collection should be dynamic and revised because of a living record of germplasms.
There is no report on revisions of core collection for perennial fruit trees.
In our study, a primary core collection of persimmon originated in China was revised based on a previous one that was developed using 19 morphological characters of 558 accessions recorded in the 1980s.
Firstly, a new primary core collection was developed using 14 morphological characters of 294 accessions recorded in CGRIS website available in 2006. Based on three stepwise clustering methods including centroid, Wards and UPGMA method and four sample ratios including 10, 30, 50 and 70% of the entire collection, 12 different primary core collections were compared in order to acquire an appropriate primary core collection.
A new primary core collection including 92 accessions was defined as the appropriate one with sample ratio of 30% (92 accessions) and clustering by UPGMA method.
Secondly, those accessions not only in the previous collection but also in the new one would be directly selected to the ultimate core collection.
There were 52 accessions available in both primary core collections.
Thirdly, 65 accessions were selected by comparing records at different time.
Finally, the revised primary core collection included 117 accessions.
All accessions were conserved in National Persimmon Germplasm Repository, Yangling in vivo.
This would provide an example for the revision of other fruit tree core collections.
Publication
Authors
Y. Zhang, Q. Zhang, Y. Yang, Z. Luo
Keywords
Diospyros kaki Thunb., core collection, morphological character, CGRIS, in vivo
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