TABLE 6.
Epistatic interactions between QTL
| Lbn-i05a | Itl-r04 | Syr-i05 | Syr-r04 | Spn1-r04 | Tns-i04 | Lbn-i04 | Tns-r04 | Mean | |
|---|---|---|---|---|---|---|---|---|---|
| Epistatic effects | 58.8b | 57.3 | 56.8 | 41.8 | 34.8 | 29.6 | 26.5 | 17.6 | 35.9 |
| a. Epistatic interactions between the two major QTL for grain yield on chromosomes 2BL and 3BS | |||||||||
| Grain yield (q ha−1) | |||||||||
| QYld.idw-2B × QYld.idw-3B | |||||||||
| a (Xgwm1027) | 0.48 | 1.54 | 1.14 | — | 1.52 | 0.35 | — | — | 0.57 |
| a (Xbarc133) | −0.36 | −1.49 | −1.48 | — | −1.11 | −0.23 | — | — | −0.52 |
| a × a parental genotypesc | 0.39 | 1.57 | 1.00 | — | 0.77 | 0.16 | — | — | 0.47 |
| a × a recombinant genotypesd | −0.39 | −1.57 | −1.00 | — | −0.77 | −0.16 | — | — | −0.47 |
| Heading date (days) | |||||||||
| QHd.idw-2B.1 × QHd.idw-3B | |||||||||
| a (Xgwm1027) | — | — | −0.5 | — | — | — | −0.4 | — | — |
| a (Xbarc133) | — | — | 0.5 | — | — | — | 0.5 | — | — |
| a × a parental genotypes | — | — | −0.5 | — | — | −0.5 | — | — | |
| a × a recombinant genotypes | — | — | 0.5 | — | — | — | 0.5 | — | — |
| Plant height (cm) | |||||||||
| QPht.idw-2B × QPht.idw-3B | |||||||||
| a (Xgwm1027) | 1.3 | 1.7 | 2.9 | 1.3 | 1.8 | 2.1 | 1.0 | 2.2 | 1.3 |
| a (Xbarc133) | −1.2 | −1.7 | −2.9 | −1.1 | −1.9 | −1.6 | −0.9 | −2.1 | −1.2 |
| a × a parental genotypes | 1.4 | 1.8 | 2.4 | 1.2 | 1.4 | 1.9 | 1.1 | 1.8 | 1.2 |
| a × a recombinant genotypes | −1.4 | −1.8 | −2.4 | −1.2 | −1.4 | −1.9 | −1.1 | −1.8 | −1.2 |
| Lbn-i05a | Itl-r04 | Syr-i05 | Itl-r05 | Syr-r05 | Tns-r04 | |
| Epistatic effects | 58.8b | 57.3 | 56.8 | 54.0 | 43.1 | 17.6 |
| b. Epistatic interactions between other major QTL | ||||||
| Heading date (days) | ||||||
| QHd.idw-2A.2 × QHd.idw-7B | ||||||
| a (Xgwm1198) | — | 1.0 | — | — | — | 1.2 |
| a (Xbarc1005) | — | −0.6 | — | — | — | −0.6 |
| a × a parental genotypesc | — | −0.2 | — | — | — | −0.4 |
| a × a recombinant genotypesd | — | 0.2 | — | — | — | 0.4 |
| QHd.idw-2A.2 × QHd.idw-2B.1 | ||||||
| a (Xwmc177) | — | — | — | — | 0.8 | — |
| a (Xgwm429) | — | — | — | — | −0.4 | — |
| a × a parental genotypes | — | — | — | — | −0.4 | — |
| a × a recombinant genotypes | — | — | — | — | 0.4 | — |
| Plant height (cm) | ||||||
| QPht.idw-2B × QPht.idw-7A | ||||||
| a (gwm1027) | 1.0 | — | 1.8 | — | — | — |
| a (cfa2028) | 0.9 | — | 2.3 | — | — | — |
| a × a parental genotypes | −0.6 | — | −1.0 | — | — | — |
| a × a recombinant genotypes | 0.6 | — | 1.0 | — | — | — |
| QPht.idw-3B × QPht.idw-7A | ||||||
| a (Xbarc133) | — | — | −2.5 | −2.0 | — | — |
| a (Xcfa2028) | — | — | 2.1 | 1.2 | — | — |
| a × a parental genotypes | — | — | 0.5 | 0.2 | — | — |
| a × a recombinant genotypes | — | — | −0.5 | −0.2 | — | — |
Additive and epistatic effects for the QTL with a significant epistatic interaction are shown. For each environment with a significant epistatic effect and for the mean data across all environments, the additive (regular font) and epistatic (italic font) values were calculated according to a linear two-marker model using the marker most associated to each QTL peak.
a
Environments are listed according to the decreasing mean grain yield value of the RILs.
b
Mean grain yield (q ha−1) of each environment.
c
Parental genotypes: KK1stQTLKK2ndQTL and SS1stQTLSS2ndQTL.
d
Recombinant genotypes: KK1stQTLSS2ndQTL and SS1stQTLKK2ndQTL.