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Rice Genomics and Genetics 2012, Vol.3, No.7, 39
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44
the cell membrane. The report showed that the above
ground of rice (leaf, stem) would accumulate a large
number of Na
+
in salt stress condition, while
SKC1
could make the excess Na
+
flow back to the root,
which would reduce the toxicity of Na
+
and enhance
the salt tolerance of rice. There would be a wide
application prospect of
SKC1
in the molecular
breeding of salt tolerance (Ren et al., 2005).
Table 2 The identified QTLs for salt tolerance in rice
Parents
Populati
on
Traits
Number of QTL
(Chromosome)
Variance
explained (%)
Reference
Aishante 2/CB
RIL
Survival days
1 (5)
11.6
Lin et al., 1998
Zaiyeqing 8/Jingxi 17 DH
Survival days
8 (1, 1, 2, 3, 7, 8, 8,
12)
10.2~38.4
Gong et al., 1998
Peta /Pokkali
BC
1
( Peta
/ Pokkali
∥
Peta)
Salt damage level
3 (5, 7, 9)
－
Guo et al., 2000
Seedling Na
+
content
1 (9)
－
Fresh weight of
seedling/Dry weight of
seedling
1 (6)
－
Stem and leaf weight in
maturity
3 (1, 7, 10)
－
Setting percentage
1 (3)
－
Length of main panicle
1 (5)
－
Plant height
1 (9)
－
Number of spikelets in
main panicle
1 (6)
－
Zaiyeqing 8/Jingxi 17 DH
Thousand–seed weight
6 (1, 2, 5, 6, 7, 8)
8.5~20.3
Gong et al., 2000
Heading stage
8 (1,4, 4, 7, 8, 10, 10,
12)
8.2~40.1
Plant height
4 (1, 4, 7, 8)
9.6~24.6
Number of grains per
panicle
4 (4, 6, 6, 12)
9.0~11.9
Number of effective tillers 4 (1, 3, 4, 6)
9.0~16.2
IR4630/IR15324
RIL
Na
+
absorb
1 (1)
8.9
Koyama et al.,
2001
K
+
absorb
3 (4, 6, 9)
6.8~19.6
Na
+
content
2 (4, 6)
6.4~19.6
K
+
content
2 (1, 4)
8.8~10.6
Na
+
/K
+
2 (1, 4)
9.1~9.6
Seedling dry weight
1 (6)
9.7
Nona Bokra/
Koshihikari
F
2:3
Survival days of seedling
3 (1, 6, 7)
13.9~18.0
Lin et al., 2004
Shoot K
+
concentration
1 (1)
40.1
Root K
+
concentration
2 (4, 7)
17.8~21.6
Root K
+
total quantity
1 (7)
17.3
Shoot Na
+
concentration
1 (7)
48.5