000			02462 a2200289 4500
003			UNISSA
005			20241116144718.0
008			241116b |||||||| |||| 00| 0 eng d
020			_a9290433191 (paperback)
040			_aUNISSA _beng _cUNISSA _erda
050			_aSB113.7 _bS235
100			_aSackville Hamilton, N.R. _eAuthor
245			_aRegeneration of accessions in seed collection : _ba decision guide / _cby N.R. Sackville Hamilton and K.H. Chorlton
264	0	1	_bInternational Plant Genetic Resources Institute _c1997 _aRome :
264	0	4	_c©1997
300			_ax, 75 pages ; _bNo illustrations ; _c30 cm
336			_2rdacontent _atext
337			_2rdamedia _aunmediated
338			_2rdacarrier _avolume
500			_aIncludes tables
504			_aIncludes bibliographical references
505			_aEx situ conservation is vital for ensuring safety the long-term sa and continued availability of plant genetic resources for use by scientists and farmers in their collective efforts to achieve global food security. The storage of dry seed at low temperature is the most widely practised method of ex situ conservation. Seed genebanks worldwide share at least two essential objectives, i.e. ensuring long-term conservation of the genetic diversity represented in the seed collections they hold, and maintaining an adequate stock of seed for distribution to users. The periodic regeneration of the seed accessions is necessary to maintain optimal seed viability over the long term as well to replenish the seed stock. To conduct sound regeneration practices, species-specific and general information such as knowledge about the reproductive biology and the extent and distribution of the genetic diversity of the material to be conserved is needed. In addition, it is necessary to minimize genetic drift and genetic shift which might occur during the regeneration process. The mechanisms underlying these phenomena and their potential effects need to be quantified and methods developed to mitigate them. The effect of seedborne pathogens on the maintenance of genetic integrity of accessions is another, related aspect that requires further investigation. In the case of cross-pollinated species, questions remain regarding the most effective isolation techniques, pollination control procedures and mating methods.
650			_aSeeds
650			_aGemplasm Resources, Plant
700			_aChorlton, K.H. _eAuthor
942			_cSINAUT _2lcc
999			_c39888 _d39888