Abstract
Effect of genetic background on detection of quantitative trait locus (QTL) governing salinity tolerance (ST) was studied using two sets of reciprocal introgression lines (ILs) derived from a cross between a moderately salinity tolerant japonica variety, Xiushui09 from China, and a drought tolerant but salinity susceptible indica breeding line, IR2061-520-6-9 from the Philippines. Salt toxicity symptoms (SST) on leaves, days to seedling survival (DSS), and sodium and potassium uptake by shoots were measured under salinity stress of 140 mmol/L of NaCl. A total of 47 QTLs, including 26 main-effect QTLs (M-QTLs) and 21 epistatic QTLs (E-QTLs), were identified from the two sets of reciprocal ILs. Among the 26 M-QTLs, only four (15.4%) were shared in the reciprocal backgrounds while no shared E-QTLs were detected, indicating that ST QTLs, especially E-QTLs, were very specific to the genetic background. Further, 78.6% of the M-QTLs for SST and DSS identified in the reciprocal ILs were also detected in the recombinant inbred lines (RILs) from the same cross, which clearly brings out the background effect on ST QTL detection and its utilization in ST breeding. The detection of ILs with various levels of pyramiding of nonallelic M-QTL alleles for ST from Xiushui09 into IR2061-520-6-9 allowed us to further improve the ST in rice.
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Claims 5
Claim · model-written summary
Forty-seven salt-tolerance QTLs were identified in reciprocal introgression lines.
- Taxon
- rice
Oryza sativat0 - Outcome
- QTLse0
- Value
- 47 QTLse0
- Qualifier
- 26 main-effect QTLs (M-QTLs) and 21 epistatic QTLs (E-QTLs)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“A total of 47 QTLs, including 26 main-effect QTLs (M-QTLs) and 21 epistatic QTLs (E-QTLs), were identified from the two sets of reciprocal ILs”
Claim · model-written summary
Only four main-effect QTLs were shared between reciprocal backgrounds.
- Taxon
- riceOryza sativat0
- Outcome
- shared in the reciprocal backgroundse0
- Value
- four (15.4%)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“only four (15.4%) were shared in the reciprocal backgrounds”
Claim · model-written summary
No epistatic QTLs were shared between reciprocal backgrounds.
- Taxon
- riceOryza sativat0
- Outcome
- no shared E-QTLs were detectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“no shared E-QTLs were detected”
Claim · model-written summary
Most main-effect QTLs for salt toxicity symptoms and seedling survival detected in reciprocal lines also appeared in recombinant inbred lines.
- Taxon
- riceOryza sativat0
- Outcome
- M-QTLs for SST and DSS identified in the reciprocal ILs were also detected in the recombinant inbred lines (RILs)e0
- Value
- 78.6%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“78.6% of the M-QTLs for SST and DSS identified in the reciprocal ILs were also detected in the recombinant inbred lines (RILs) from the same cross”
Claim · model-written summary
Pyramiding nonallelic main-effect QTL alleles from Xiushui09 into IR2061-520-6-9 improved salt tolerance.
- Taxon
- riceOryza sativat0
- Treatment
- pyramiding of nonallelic M-QTL alleles for ST from Xiushui09 into IR2061-520-6-9e0
- Outcome
- ST in ricee0
- Direction
- improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“pyramiding of nonallelic M-QTL alleles for ST from Xiushui09 into IR2061-520-6-9 allowed us to further improve the ST in rice”
The same questions in other papers
salinity · tolerance: abiotic · Oryza sativa (rice)Positive and negative results
10 papers in the same direction as this paper · 6 in the opposite direction
- negative
- negative
- no effect
13 papers more in this group
See all 17 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.