000			01990nam a2200289Ia 4500
003			MX-MdCICY
005			20250625160148.0
040			_cCICY
090			_aB-16298
245	1	0	_aCore collections: A practical approach to genetic resources management
490	0		_vGenome, 31(2), p.818-824, 1989
520	3		_aLarge numbers of entries are now lodged in many of the world's germ-plasm collections of crop and pasture plants. This abundance of material, assembled to guard against its irretrievable loss, has intensified the problems of how best to conserve it and how to use it in plant breeding. Core collections have a major role to play in solving these problems. The core is composed of about 10 percent of the total collection, chosen to represent as much as possible of the diversity in the collection. The selection ofthe core entries should use the available data on the geographic origin, the genetic characteristics, and the posible value to breeders and other users of each accession in the collection. Stratified sampling from groups of accessions, in logarithmic or absolute proportion to the group size, is the best strategy. The core entries should be kept separately and not in one bulk population. The composition of the core should be adjusted as new material is ineluded, or better data are obtained. The remaining accessions in the collection form the reserve, which should be conserved as secondary sources
650	1	4	_aMEDICAL TERMS: ANIMAL
650	1	4	_aCONFERENCE PAPER
650	1	4	_aGENETIC CONSERVATION
650	1	4	_aGENETIC ENGINEERING
650	1	4	_aGENOME
650	1	4	_aGERM LINE
650	1	4	_aHEREDITY
650	1	4	_aHIGHER PLANT
650	1	4	_aNONHUMAN
650	1	4	_aPLASMA
700	1	2	_aBrown, A.H.D.
856	4	0	_uhttps://drive.google.com/file/d/1pOwfI7moNRwud2hjpXq64L9xYyEnz08V/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
942			_2Loc _cREF1
008			250602s9999 xx |||||s2 |||| ||und|d
999			_c50472 _d50472