Computer Simulation for the Evaluation of Recombination Strategies in Intrapopulation Recurrent Selection in Eucalyptus

Abstract

Intrapopulation recurrent selection (IRS) has proven to be a promising breeding method in eucalyptus, mainly through being easier to carry out when compared to reciprocal recurrent selection (RRS). However, the recombination strategies in IRS that have not yet been compared. Thus, the purpose of this study was to verify the efficiency of different recombination methods in IRS. To do so, computer simulation was used considering different heritabilities (0.1, 0.5, 1.0), different initial allelic frequencies (0.2, 0.8) and allelic interactions without dominance and with complete dominance. The initial population consisted of 1000 individuals, which were selected at random for the beginning of cycle zero. These individuals were interbred two by two. Three selection strategies were carried out and, consequently, three recombination methods: recombine the best individuals selected within the best progenies; the best individuals phenotypically selected regardless of their genealogy; or selection in the mean value of the best progenies selected. It was observed that recombination of the best individuals regardless of their genealogy and of the best individuals within the best progenies provided for gains superior to recombination having only the mean of the progenies as reference. The average degree of dominance and the heritability of the trait should be considered at the time of choosing the method of selection followed by recombination.

Intrapopulation Recurrent Selection Strategies in Plant Breeding

“…In the context of RS, there are several options for recombination. However, through simulations, Abreu et al (2013) showed that the use of the best individuals/clones from the best progenies allows obtaining more significant gain with RS than the employment of remnant seeds of the best progenies or, in the case of perennial plants, the plants that originated the progenies. However, HS progenies are obtained when clones are used for the recombination and the crossbreeding occurs randomly.…”

Strategies for the recurrent selection program in tobacco breeding for green leaf yield

“…There are numerous methods that can be used, in addition to mass selection, in the conduction of RS cycles, depending on the evaluated progenies which may be non‐inbred, half‐sibs (HS), full‐sibs (FS), or inbred progenies (S 0:1 , S 0:2 , S 1:2 , lines, or DH lines). Alternatives are also possible in recombination using HS, FS, S 0:1 , DH, or even clones (Abreu et al., 2013; Hallauer et al., 2010)…”

“…There are numerous methods that can be used, in addition to mass selection, in the conduction of RS cycles, depending on the evaluated progenies which may be non-inbred, half-sibs (HS), full-sibs (FS), or inbred progenies (S 0:1 , S 0:2 , S 1:2 , lines, or DH lines). Alternatives are also possible in recombination using HS, FS, S 0:1 , DH, or even clones (Abreu et al, 2013;Hallauer et al, 2010) Comparisons between methods of conducting RS have been carried out with existing information in the literature in which different selection strategies were used. However, the most frequent use of estimators of the expected gain with the selection has been used.…”

IPRDataCol - software for field labelling and data storage

“…In general, the software developed and used in the field of genetics and plant breeding has very efficiently prioritized aspects of biometrics applied to breeding (Cruz and Schuster 2004, Peternelli et al 2009, Peternelli 2011, Cruz 2013, Akbarpour et al 2016, Resende 2016, Bhering 2017, Matias et al 2018, agronomic experimentation (Ferreira 2011, Ferreira 2013, computational simulation (Abreu et al 2013), or even in teaching on genetics and plant breeding (Cruz et al 2011, Fritsche-Neto andMatias 2016). Different languages or programming environments such as Visual Basic, Delphi, Java, SAS, and R…”