This first study of QTL mapping for Si content in rice provides evidence in support of the conclusion drawn by classical studies that genotype differences on Si content in rice were controlled by polygenes
(Majumder et al., 1985).
QTLs and markers genotype : Three traits were researched, each of which were affected by a QTL and polygene
respectively, each of the three corresponding QTLs has two alleles (Q and q), Q was favourable allele, q was unfavourable allele, there were no dominant effect between them.
Synergistic interaction of spontaneous mutant polygenes
heritability for grain filling duration was higher than heritability due to polygene
in BC1 BC2 and F2 for the crosses with highest environmental influence.
In the process of TS, within-family and between-family selection are given equal selection pressure by SQS, but the selection intensity given to QTL is larger than polygenes
. For a favorable QTL allele, from the staring of mutation, it has been given very high selection intensity by SQS that maximizes the selection response from current generation to next generation.
In addition to these genes, polygenes
, which function together to control a quantitatively expressed resistance, have been located on several chromosomes in the A, B, and D genomes (Nicholson et al., 1993; Hu et al., 1996).
Linextester mating systems have provided genetic understanding for a chosen set of parents (Ceyhan, 2003; Ceyhan et al., 2008) and have been used to study various traits in many crops (Ahuja and Dhayal, 2007, Venkatraman et al., 2007; Kwaye et al., 2008; Kadanapuradadoddi et al., 2011).Generally seed yield is a quantitative trait which is governed by polygenes
in bean (Arunga et al., 2010).
The detection of major genes by means of the equation proposed by Fain (1978) and described by Lynch and Walsh (1998) resulted in a P value = 0.66 for the quadratic b2 term, indicating that a major gene was not segregating for the families evaluated in this study and that environmental factors and other polygenes
could contribute to the differences between families.
Chang and Yen (1969) and Chang and Tagumpay (1973) concluded that the seed dormancy is a quantitative trait governed by polygenes
with cumulative but unequal effects and is strongly affected by environmental conditions during seed development.
I, Spontaneous mutation rate of polygenes
Synergistic interactions of spontaneous mutant polygenes