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Table 1 Mean comparison of QTL classes of grain yield (kg ha− 1) across F3 to F8 generations under reproductive-stage drought stress and irrigated non-stress control conditions in Swarna-Sub1 background at IRRI, Philippines

From: Marker-assisted selection strategy to pyramid two or more QTLs for quantitative trait-grain yield under drought

QTL class

QTL

2012DS

2012DS

2012DS

2012DS

2012DS

2012WS

2013DS

2013DS

2014DS

2014DS

2015WS

2015WS

2016DS

  

NS_Med

RS_Med

RS_ Med

NS_Late

RS_Late

NS

NS

RS

NS

RS

NS

RS

RS

  

F3

F3

F3

F3

F3

F4

F5

F5

F7

F7

F8

F8

F8

Population size

  

663

366

304

91

84

754

432

432

432

432

52

52

52

A

qDTY 1.1

4906 bc

2677 cde

2894 bcf

6766 gh

3674 c

3925 bc

–

–

–

–

–

–

–

B

Sub1+ qDTY 1.1

5431 efg

2228ab

2930 bg

4141 a

3652 bc

3536 bcd

–

–

–

–

5191 c

68.24 a

579 b

C

DTY 2.1

4811cde

2828 efg

2962 abg

4265 ab

3719 bc

4176 abc

–

–

–

–

–

–

–

D

Sub1+ qDTY 2.1

5084 cf

2452 bcde

2776 abde

4649 ab

3554 bc

2729 a

4109 bc

793 ac

–

–

–

–

–

E

qDTY 3.1

5098 cdeg

3010 gh

3001 bg

4987 ac

2658 b

–

4135 bc

973 ac

7941 ab

1868 cd

–

–

–

F

Sub1+ qDTY 3.1

4705 bc

3027 fh

2984 bg

–

3315 bc

4663 ac

4107 cd

1097 cd

7934 b

1838 cd

4940 b

97.96 a

677 c

G

Sub1

5430 cf

2642 bcefh

2334 ab

5338 bcd

3204 bc

3515 a

2948 abc

530 ac

–

–

–

–

–

H

qDTY 1.1 + qDTY 2.1

5394 df

2653 ce

3131 efg

6445 fg

3671 c

4308 ab

–

–

–

–

–

–

–

I

Sub1 + qDTY 1.1  + qDTY 2.1

5444 ef

2428 ac

3133 efg

6642 fgh

3636 c

4460 ab

3710 bc

605 ab

–

–

–

–

–

J

qDTY 1.1  + qDTY 3.1

4788 c

2693 de

2945 be

6395 fg

3481 bc

4288 ab

–

–

–

–

–

–

–

K

Sub1 + qDTY 1.1  + qDTY 3.1

4989 cd

2832 efg

3003 ceg

6639 efh

3377 bc

5183 c

3456 b

677 ad

–

–

4676 a

159.19 b

566 b

L

qDTY 2.1  + qDTY 3.1

5265 bdf

2998 fh

2955 bg

–

3620 bc

4623 ac

4116 cd

992 bcd

7932 ab

1672 bc

–

–

–

M

qDTY 2.1  + qDTY 3.1  + Sub1

5154 cf

3172 h

3162 efg

7380 hi

3714 bc

–

4192 cd

1048 bcd

8194 b

1503 ab

5754 g

360.16 c

830 d

N

qDTY 1.1  + qDTY 2.1  + qDTY 3.1

5055 cd

2845 df

3130 dg

7373 hi

3505 c

4807 bc

3912 bd

1073 c

8043 b

1854 d

–

–

–

O

Sub1+ qDTY 1.1  + qDTY 2.1  + qDTY 3.1

5484 ef

3010 gh

3167 fg

6780 gh

3859 c

4838 bc

4141 c

1092 c

8297 b

1918 d

5434 e

356.81 c

931 d

X

Parent

3818 a

2203 ab

2465 a

5827 cde

2828 ab

5146 c

2106 a

764 ac

5818 a

799 a

5358 f

64.45 a

398 a

Trial mean

5077

2691

2937

6044

3474

4760

3615

838

7878

1652

5222

175

605

 

F- value

3.68

7.39

2.45

19.77

1.21

6.04

13.22

1.79

6.88

3.75

5.38

6.16

3.93

 

p-value

0.0168

<.0001

0.0018

0.0001

0.2838

<.0001

0.0003

0.0559

0.0003

0.0008

<.0001

0.2991

0.368

  1. 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, Med medium duration, Late late duration, X recipient parent (no QTL)
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