Identification of heterotic loci associated with yield-related traits in Chinese common wild rice (Oryza rufipogon Griff.)

Gene interactions and genetics of blast resistance and yield attributes in rice (Oryza sativa L.)

“…The epistatic effects among resistance genes have been reported earlier in several gene combinations during pyramiding process (Yoshimura et al 1995;Fukuta et al 1998;Fujita et al 2010). QTLs/genes with different levels of dominant, overdominant and epistatic effects have been mapped in rice (Mei et al 2003(Mei et al , 2005Luo et al 2011). In case of stress-related QTLs, the results of the marker-assisted selection are limited (Tuberosa et al 2002;Steele et al 2006) owing to difficulties such as QTL that have epistatic interactions and do not contribute uniformly in different genetic backgrounds.…”

Yield-Enhancing Heterotic QTL Transferred from Wild Species to Cultivated Rice Oryza sativa L

“…In these ILs, 37 markers confirmed the presence of 32 alien segments dispersed across the genome. Sixteen alien segments, associated with 19 markers, have been located in the same or similar regions where QTL for yield and its component traits were mapped in previous studies [14]–[16], [20], [23], [37], [40]–[45] (Table 4). ILHs developed from these alien ILs, carrying introgressions from ‘A’ genome donor species, demonstrated the scope of utilization of alien introgressions in heterosis breeding.…”

“…Following the availability of advanced-backcross quantitative trait loci (AB-QTL) approach proposed by Tanksley and Nelson [12], discovery of favorable genes from wild species received impetus as a plant breeding strategy. Consequently, several yield-enhancing alleles from wild species of rice, such as O. rufipogon , were identified and introduced into high-yielding elite cultivars [13]–[20]. Apart from O. rufipogon , search for yield-enhancing quantitative trait loci (QTL) alleles was successfully extended to O. glaberrima [21], O. grandiglumis [22], O. glumaepatula [23], O. longistaminata [24] and O. minuta [25].…”

Field level evaluation of rice introgression lines for heat tolerance and validation of markers linked to spikelet fertility

“…Japonica) and an accession of O. rufipogon (IRGC 105491). Luo et al (2011) also showed that RM210 was a heterotic locus, hsp8 associated with number of spikelets per panicle in ILs of common wild rice O. rufopogon in an indica cultivar Guichao2 background. In our study, RM430 was significantly associated with both spikelet fertility and yield per plant explaining 11.74 % and 12.84 % phenotypic variance respectively under heat stress conditions.…”