Genetic stability of synthetics derived from double-cross or three-way line hybrids Report as inadecuate




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REVISTA CHAPINGO SERIE HORTICULTURA 2015, XXI (2)

Author: Jaime Sahagún-Castellanos

Source: http://www.redalyc.org/


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REVISTA CHAPINGO SERIE HORTICULTURA ISSN: 1027-152X chapingo.horticultura@gmail.com Universidad Autónoma Chapingo México Sahagún-Castellanos, Jaime Genetic stability of synthetics derived from double-cross or three-way line hybrids REVISTA CHAPINGO SERIE HORTICULTURA, vol.
XXI, núm.
2, julio, 2015, pp.
147-155 Universidad Autónoma Chapingo Chapingo, México Available in: http:--www.redalyc.org-articulo.oa?id=60941168003 How to cite Complete issue More information about this article Journals homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative Scientific article Genetic stability of synthetics derived from double-cross or three-way line hybrids Estabilidad genética de sintéticos formados con cruzas dobles o trilineales Jaime Sahagún-Castellanos Instituto de Horticultura, Departamento de Fitotecnia, Universidad Autónoma Chapingo. Carretera México-Texcoco km 38.5, Chapingo, Estado de México.
C.P.
56230.
MÉXICO Correo- e: jsahagunc@yahoo.com.mx Abstract I Keywords: Zea mays L., Allium cepa L., non-identical by descent genes, inbreeding coefficient, genotypic mean. n the development of the theory of synthetic varieties (SVs) of crop species such as maize (Zea mays L.) and onion (Allium cepa L.), formed with single-cross hybrids, it has been shown that genetic erosion may occur during their formation.
This erosion increases inbreeding and reduces yield.
This gene loss is caused by the mating of heterozygous genotypes, the finite number of their progeny, and the randomness of the genetic mechanism.
The main objective of this study was to determine the number of non-identical by descent (NIBD) genes lost during the development of the individuals that represent the double-cross (DC) or three-way (TW) line hybrids that in turn will be parents of a SV.
The initial lines were assumed to be inbred an...





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