Table 5.
Mean comparison of QTL classes of grain yield (kg ha−1) across BC1F3 to BC1F7 generations under reproductive-stage drought stress and irrigated non-stress control conditions in MR219 background at IRRI, Philippines
| QTL class | QTL | 2013DS | 2014DS | 2015DS | |||
|---|---|---|---|---|---|---|---|
| NS | RS | NS | RS | NS | RS | ||
| BC1F3 | BC1F3 | BC1F5 | BC1F7 | BC1F7 | |||
| Population size | |||||||
| 214 | 214 | 620 | 620 | 70 | 70 | ||
| A | qDTY 12.1 | 6229 a | 654 b | 6967 b | 301 a | – | – |
| B | qDTY12.1 + qDTY2.2 | 6633 b | 761 bc | 7364 ac | 598 b | 5986 a | 540 c |
| C | qDTY12.1 + qDTY3.1 | 6652 ac | 1072 d | 7532 cd | 794 e | 7111 c | 672 d |
| D | qDTY 2.2 | 6760 ab | 904 cd | 7079 ba | 669 bc | 6957 c | 393 b |
| E | qDTY2.2 + qDTY3.1 | 7158 bc | 1112 d | 7243 cd | 663 c | 6843 bc | 679 d |
| F | qDTY2.2 + qDTY3.1 + qDTY12.1 | 6799 ab | 642 b | 7106 ad | 442 b | 6674 bc | 578 cd |
| G | qDTY 3.1 | 6488 a | 890 c | 7374 ac | 568 c | 6923 bc | 537 bcd |
| X | Parent | 5917 ab | 13 a | 6519 b | 0 ab | 6148 ab | 0 a |
| Trial mean | 6705 | 781 | 7173 | 505 | 6663 | 486 | |
| F- value | 2.0 | 11.76 | 9.45 | 19.39 | 7.76 | 6.18 | |
| p-value | 0.05 | < 0.0001 | < 0.0001 | < 0.0001 | 0.0004 | <.0001 | |
The letter display are QTL class labels ordered by mean grain yield of QTL class. Means followed by the same letter (within a column) are not significantly different, DS dry season, WS wet season, NS non-stress, RS reproductive-stage drought stress, X recipient parent (no QTL)