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Table 4 Mean comparison of QTL classes of grain yield (kg ha−1) across BC2F3 to BC2F8 generations under reproductive-stage drought stress and irrigated non-stress control conditions in TDK-Sub1 background at IRRI, Philippines

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

QTLclass

QTL

2013WS

2014DS

2014WS

2015DS

2015WS

2016DS

  

RS

NS

RS

NS

NS

RS

NS

RS

NS

RS

  

BC2F3

BC2F4

BC2F4

BC2F5

BC2F6

BC2F6

BC2F7

BC2F7

BC2F8

BC2F8

Population size

  

843

231

231

48

48

48

60

60

60

60

A

Sub1 + qDTY 6.1  + qDTY 6.2 + qDTY 3.1

1232 gh

6883 bc

2453 c

2763 bc

6252bc

816 f

4356 ab

158 de

4739 ab

298 cd

B

qDTY 6.1 + qDTY 6.2 + qDTY 3.1

1298 gh

6289 b

2069 b

2629 ac

6174 c

250 bc

4966 cd

122 cd

4871 ab

278 c

C

Sub1+ qDTY 6.1  + qDTY 6.2

1301 gi

6289 abc

2143 bc

2897 bcd

6475 c

552 de

4797 bd

73.83 abc

4804 b

320 cd

D

Sub1+ qDTY 6.1 + qDTY 3.1

1091 fde

5707 ab

2120 bc

3476 c

5958 ab

368 bd

4657 bc

75 bc

4780 ab

179 ac

E

Sub1+ qDTY 6.2  + qDTY 3.1

1178 ge

6061 abc

2112 bc

2576 ac

5157 a

274 bc

F

qDTY 6.1  + qDTY 6.2

998 cd

3890 a

2126 bc

2307 ac

4799 a

501 cde

G

qDTY 6.1  + qDTY 3.1

1012 ge

5874 ab

1959 b

2704 ac

6775 c

211.97 b

5074 d

73 b

4793 ab

113 ab

H

qDTY 6.2  + qDTY 3.1

1134 fe

I

Sub1 + qDTY 6.2

1051 ce

J

Sub1+ qDTY 6.1

1446 j

K

Sub1 + qDTY 3.1

1376 hij

L

qDTY 6.2

1416 ij

M

qDTY 6.1

1308 gh

N

qDTY 3.1

1217 fg

X

Parent

421 a

6091 abc

24 a

2167 a

6135 bc

0 a

3647 a

2 a

4674 a

0 a

Trial mean

1165

5886

1863

2715

6091

409

4583

84

4760

198

 

F- value

34.1

6.6

1.03

3.21

4.99

16.32

6.44

6.0

5.32

5.0

 

p-value

<.0001

0.0012

0.4207

0.0341

0.0105

<.0001

<.0001

0.0001

0.0013

0.0046

  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, X recipient parent (no QTL)