A blog maintained by Tevita Kete, PGR Officer
Secretariat of the Pacific Community (SPC), Suva, Fiji Islands
This weblog documents the activities of Pacific Agricultural Genetic Resources Network (PAPGREN), along with other information on plant genetic resources (PGR) in the Pacific.
The myriad varieties found within cultivated plants are fundamental to the present and future productivity of agriculture. PAPGREN, which is coordinated by the Land Resources Division of the Secretariat of the Pacific Community (SPC), helps Pacific countries and territories to conserve their crop genetic diversity sustainably, with technical assistance from the Bioversity International (BI) and support from NZAID and ACIAR.
SPC also hosts the Centre of Pacific Crops and Trees (CEPaCT). The CEPaCT maintains regional in vitro collections of crops important to the Pacific and carries out research on tissue culture technology. The CEPaCT Adviser is Dr Mary Taylor (MaryT@spc.int), the CEPaCT Curator is Ms Valerie Tuia (ValerieT@spc.int).
PAPGREN coordination and support
Mr William Wigmore
Mr Adelino S. Lorens
Dr Lois Englberger
Mr Apisai Ucuboi
Dr Maurice Wong
Mr Tianeti Beenna Ioane
Mr Frederick Muller
Mr Herman Francisco
Ms Rosa Kambuou
Ms Laisene Samuelu
Mr Jimi Saelea
Mr Tony Jansen
Mr Finao Pole
Mr Frazer Bule Lehi
Interested in GIS?
Thursday, November 02, 2006
Posted 2:32 PM by Luigi
AFLP analysis of genetic diversity within Saccharum officinarum and comparison with sugarcane cultivars
K. S. Aitken, J.-C. Li, P. Jackson, G. Piperidis and C. L. McIntyre
Australian Journal of Agricultural Research 57(11) 1167–1184
Molecular diversity among 421 clones of cultivated sugarcane and wild relatives was analysed using AFLP markers. Of these clones, 270 were Saccharum officinarum and 151 were either cultivars produced by the Australian breeding program or important parents used in the breeding program. The S. officinarum clones were obtained from a collection that contained clones from all the major regions where S. officinarum is grown. Five AFLP primer combinations generated 657 markers of which 614 were polymorphic. All clones contained a large number of markers; a result of the polyploid nature and heterozygosity of the genome. S. officinarum clones from New Guinea displayed greater diversity than S. officinarum clones from other regions. This is in agreement with the hypothesis that New Guinea is the centre of origin of this species. The S. officinarum clones from Hawaii and Fiji formed a separate group and may correspond to clones that have been introgressed with other members of the ‘Saccharum complex’. Greater diversity was found in the cultivars than in the S. officinarum clones due to the introgression of S. spontaneum chromatin. These cultivars clustered as expected based on pedigree. The major contribution of clones QN66-2008 and Nco310 to Australian sugarcane cultivars divided the cultivars into 2 main groups. Although only a few S. officinarum clones are known to have been used in the breeding of current cultivars, about 90% of markers present in the S. officinarum clone collection (2n = 80) were also present in the cultivar collection. This suggests that most of the observed genetic diversity in S. officinarum has been captured in Australian sugarcane germplasm.
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Agrobiodiversity Weblog: For discussions of conservation and sustainable use of the genetic resources of crops, livestock and their wild relatives.