Basic HTML Version
Molecular Plant Breeding 2013, Vol.5, No.9, 47
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63
http://mpb.biopublisher.ca
56
(B) Under Saline Stress conditions
Genotypes
SES score
Plant height (cm)
Roots length (cm) Fresh weight (g) Dry weight (g)
1
RIL 21
4
13
6
0.167
0.032
2
RIL 35
4
31
14
0.086
0.047
3
RIL 40
4
33
13
0.421
0.075
4
RIL 44
4
23
13
0.299
0.059
5
RIL 70
4
26
10
0.166
0.043
6
RIL 84
4
24
11
0.293
0.061
7
RIL 102
4
21
14
0.289
0.071
8
RIL 106
4
28
11
0.252
0.051
9
RIL 107
4
27
12
0.334
0.076
10
RIL 115
4
36
13
0.388
0.061
11
RIL 121
3
23
13
0.280
0.047
12
RIL 137
4
21
10
0.219
0.050
13
RIL 139
4
33
10
0.715
0.088
14
RIL 178
4
11
7
0.169
0.023
15
RIL 181
4
12
11
0.230
0.028
16
RIL 190
4
12
5
0.226
0.029
17
RIL 191
4
12
6
0.222
0.028
18
RIL 202
4
13
11
0.120
0.039
19
RIL 207
4
20
10
0.380
0.052
20
RIL 220
4
31
14
0.457
0.073
21
RIL 251
3
19
10
0.172
0.025
22
RIL 253
4
13
8
0.076
0.033
23
RIL 258
4
13
9
0.122
0.030
24
RIL 260
4
22
8
0.126
0.013
25
RIL 261
4
15
9
0.144
0.027
26
RIL 270
4
27
12
0.331
0.103
27
RIL 271
4
20
12
0.291
0.055
28
RIL 272
3
35
12
0.394
0.050
29
RIL 287
4
25
13
0.076
0.478
30
RIL 294
4
25
15
0.128
0.877
31
RIL 295
3
25
9
0.133
0.045
Hasawi tolerant donor)
4
28
10
0.352
0.112
IR 29 Sensitive parent) 7
17
8
0.144
0.040
Various QTLs
for
salinity
tolerance
under
hydroponic
conditions
have
been
detected
repeatedly
on
many
chromosomes
in
rice
including
1
and
6;
whilst
very
few
have
been
found
on
chromosomes
2,
3,
5,
9,
10
and
12.
(Negrão
et
al.,
2011).
Takehisa
et
al.
(2004)
found
6
QTLs
associated
with
shoot
fresh
weight
on
6
chromosomes
including
1
and
6
as
per
our
research.
Prasad
et
al.
(2000)
detected
4 QTL
for
seedling
vigor
on
chromosome
6;
and Masood
et
al.,
(2004)
identified
4
QTLs
for
dry
shoot
weight
on
chromosomes
1
(3
QTLs)
and
6
(1
QTL)
respectively
under
hydroponic
condition
at
an
EC
level
of
12
dS/m
accounting
together
for
97.9%
of
trait
variation.
Some QTL
controlling
shoot
dry weight
on
have
been
mapped
on
chromosome
6
(Koyama
et
al.,
2001; Tuan
et
al.,
2000).
The
authors
concluded
that
high
shoot
dry
weight
after
saline
stress
can
be
used
as
an
indicator
for
tolerance
to
salinity.
The
genetics
of
salt
tolerance
in
rice
for
many
traits
such
as
shoot
fresh weight
and
shoot
dry weight
have
revealed
that
tolerance
is
associated
with
polygenes