Abstract
Comparison of maps and QTLs between populations may provide us with a better understanding of molecular maps and the inheritance of traits. We developed and used two reciprocal BC1F1 populations, IP/DS//IP and IP/DS//DS, for QTL analysis. DS (Dasanbyeo) is a Korean tongil-type cultivar (derived from an indica x japonica cross and similar to indica in its genetic make-up) and IP (Ilpumbyeo) is a Korean japonica cultivar. We constructed two molecular linkage maps corresponding to each backcross population using 196 markers for each map. The length of each chromosome was longer in the IP/DS//IP population than in the IP/DS//DS population, indicating that more recombinants were produced in the IP/DS//IP population. Distorted segregation was observed for 44 and 19 marker loci for the IP/DS//IP and IP/DS//DS populations, respectively; these were mostly skewed in favor of the indica alleles. A total of 36 main effect QTLs (M-QTLs) and 15 digenic epistatic interactions (E-QTLs) were detected for the seven traits investigated. The phenotypic variation explained (PVE) by M-QTLs ranged from 3.4% to 88.2%. Total PVE of the M-QTLs for each trait was significantly higher than that of the E-QTLs. The total number of M-QTLs identified in the IP/DS//IP population was higher than in the IP/DS//DS population. However, the total PVE by the M-QTLs and E-QTLs together for each trait was similar in the two populations, suggesting that the two BC1F1 populations are equally useful for QTL analysis. Maps and QTLs in the two populations were compared. Eleven new QTLs were identified for SN, SF, GL, and GW in this study, and they will be valuable in marker-assisted selection, particularly for improving grain traits in tongil-type varieties.
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Claims 13
Claim · model-written summary
Distorted segregation was observed at 44 marker loci in the IP/DS//IP population, mostly skewed in favor of indica alleles.
- Taxon
- rice
Oryza sativat0 - Material
- IP/DS//IPe1
- Outcome
- distorted segregatione1
- Value
- 44e1
- Qualifier
- mostly skewed in favor of the indica allelese1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Populations of Rice”
e1“Distorted segregation was observed for 44 and 19 marker loci for the IP/DS//IP and IP/DS//DS populations, respectively; these were mostly skewed in favor of the indica alleles”
Claim · model-written summary
Distorted segregation was observed at 19 marker loci in the IP/DS//DS population, mostly skewed in favor of indica alleles.
- Taxon
- riceOryza sativat0
- Material
- IP/DS//DSe1
- Outcome
- distorted segregatione1
- Value
- 19e1
- Qualifier
- mostly skewed in favor of the indica allelese1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Populations of Rice”
e1“Distorted segregation was observed for 44 and 19 marker loci for the IP/DS//IP and IP/DS//DS populations, respectively; these were mostly skewed in favor of the indica alleles”
Claim · model-written summary
A total of 36 main effect QTLs (M-QTLs) were detected for the seven traits investigated.
- Taxon
- riceOryza sativat0
- Outcome
- main effect QTLs (M-QTLs)e1
- Value
- 36e1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Populations of Rice”
e1“A total of 36 main effect QTLs (M-QTLs)”
Claim · model-written summary
A total of 15 digenic epistatic interactions (E-QTLs) were detected for the seven traits investigated.
- Taxon
- riceOryza sativat0
- Outcome
- digenic epistatic interactions (E-QTLs)e1
- Value
- 15e1
- Qualifier
- for the seven traits investigatede1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Populations of Rice”
e1“15 digenic epistatic interactions (E-QTLs) were detected for the seven traits investigated”
Claim · model-written summary
The phenotypic variation explained by M-QTLs ranged from 3.4% to 88.2%.
- Taxon
- riceOryza sativat0
- Outcome
- phenotypic variation explained (PVE) by M-QTLse1
- Value
- 3.4% to 88.2%e1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Populations of Rice”
e1“The phenotypic variation explained (PVE) by M-QTLs ranged from 3.4% to 88.2%”
Claim · model-written summary
Total PVE of the M-QTLs for each trait was significantly higher than that of the E-QTLs.
- Taxon
- riceOryza sativat0
- Outcome
- Total PVE of the M-QTLse1
- Direction
- highere1
- Comparator
- E-QTLse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Populations of Rice”
e1“Total PVE of the M-QTLs for each trait was significantly higher than that of the E-QTLs”
Claim · model-written summary
The total number of M-QTLs identified was higher in the IP/DS//IP population than in the IP/DS//DS population.
- Taxon
- riceOryza sativat0
- Material
- IP/DS//IP populatione1
- Outcome
- total number of M-QTLs identifiede1
- Direction
- highere1
- Comparator
- IP/DS//DS populatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Populations of Rice”
e1“The total number of M-QTLs identified in the IP/DS//IP population was higher than in the IP/DS//DS population”
Claim · model-written summary
The total PVE by M-QTLs and E-QTLs together was similar in the two populations.
- Taxon
- riceOryza sativat0
- Outcome
- total PVE by the M-QTLs and E-QTLs togethere1
- Direction
- similare1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Populations of Rice”
e1“However, the total PVE by the M-QTLs and E-QTLs together for each trait was similar in the two populations”
Claim · model-written summary
The two BC1F1 populations are equally useful for QTL analysis (author conclusion).
- Taxon
- riceOryza sativat0
- Material
- BC1F1 populationse1
- Outcome
- useful for QTL analysise1
- Qualifier
- equallye1
- Comparator
- the two BC1F1 populationse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Populations of Rice”
e1“suggesting that the two BC1F1 populations are equally useful for QTL analysis”
Claim · model-written summary
Eleven new QTLs were identified for SN, SF, GL and GW.
- Taxon
- riceOryza sativat0
- Outcome
- new QTLse1
- Value
- Elevene1
- Qualifier
- for SN, SF, GL, and GWe1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Populations of Rice”
e1“Eleven new QTLs were identified for SN, SF, GL, and GW in this study”
Claim · model-written summary
The QTLs are expected to be valuable in marker-assisted selection for improving grain traits in tongil-type varieties (author recommendation).
- Taxon
- riceOryza sativat0
- Outcome
- marker-assisted selectione1
- Qualifier
- particularly for improving grain traits in tongil-type varietiese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Populations of Rice”
e1“they will be valuable in marker-assisted selection, particularly for improving grain traits in tongil-type varieties”
Claim · model-written summary
The chromosomes of the IP/DS//IP map were longer than those of the IP/DS//DS map.
- Taxon
- riceOryza sativat0
- Material
- IP/DS//IP populatione1
- Outcome
- length of each chromosomee1
- Direction
- longere1
- Comparator
- IP/DS//DS populatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Populations of Rice”
e1“The length of each chromosome was longer in the IP/DS//IP population than in the IP/DS//DS population”
Claim · model-written summary
More recombinants were produced in the IP/DS//IP population (author interpretation of map length).
- Taxon
- riceOryza sativat0
- Material
- IP/DS//IP populatione1
- Outcome
- recombinantse1
- Direction
- moree1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Populations of Rice”
e1“indicating that more recombinants were produced in the IP/DS//IP population”