Alejandro Ibarra-Sánchez, Juan Enrique Rodríguez-Pérez, Aureliano Peña-Lomelí, Clemente Villanueva-Verduzco, Jaime Sahagún-Castellanos^*

Phyton-International Journal of Experimental Botany, Vol.91, No.1, pp. 33-43, 2022, DOI:10.32604/phyton.2022.016136

Abstract Synthetic varieties (SVs) are populations generated by randomly mating their parents. They are a good alternative for low-input farmers who grow onions, maize, and other allogamous crops since the seed produced by a SV does not change from one generation to the next. Although SV progenitors are commonly pure lines, in this case a synthetic (Syn_TC) whose parents are t three-way line crosses, a very common type of maize hybrid grown in Mexico, is studied. The aim was to develop a general and exact equation for the inbreeding coefficient of a Syn_TC Syn_TC because of its relationship with… More >

Rodríguez-Pérez JE, J Sahagún-Castellanos, JL Escalante-González, JJ López-Reynoso, C V illanueva-Verduzco

Phyton-International Journal of Experimental Botany, Vol.86, pp. 224-227, 2017, DOI:10.32604/phyton.2017.86.224

Abstract Synthetic varieties (SVs) have been assumed to be genetically stable populations through generations. However, it has been recognized that the randomness of the genetic mechanism, the presence of parents with heterozygous genotypes, and the finite sample sizes of the individuals that represent each parent of a SV may cause gene loss, which may make it difficult to obtain the expected genotypic array of a given SV. To study this issue, the number of non-identical by descent (NIBD) genes in the sample of m plants of each parental line was considered as a random variable (Ym). The objectives were: (1) to… More >