Abstract
In order to provide a genetic basis for fertility restoration by a common wheat, Triticum aestivum cv. Chinese Spring against the cytoplasm of Aegilops ovata, two sets of monosomic analysis have been carried out. From the results, the following conclusions were drawn: (1) Rfo2 gene, a key factor on chromosome 1B of Chinese Spring restores in its double dose selfed seed fertility to above 25%, (2) in its single dose the presence of a factor on chromosome 7A and another factor either on chromosome 5A or 5B, both in double dose, is necessary to assure the same level of fertility restoration, (3) absence of the key gene (Rfo2) causes complete sterility, and (4) modifiers which improve the level of fertility restoration to some extent are located on chromosome 1A, 4A and 7D of Chinese Spring. Since the single dose of Rfo2 gene can not restore fertility to above 25% when other restoring genes are in heterozygous condition, utilization of this gene in breeding both hybrid wheat and bred-true, fertile line with the ovata cytoplasm is greatly limited. The results provided another example of the linkage between fertility- restoring gene and a nucleolus-organizing region.
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Claims 10
Claim · model-written summary
Double-dose Rfo2 on chromosome 1B restores selfed seed fertility above 25%.
- Taxon
- Triticum aestivum cv. Chinese Spring
Triticum aestivumt0 - Gene
- Rfo2 genee0
- Outcome
- selfed seed fertilitye0
- Direction
- restorese0
- Value
- above 25%e0
- Qualifier
- double dosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rfo2 gene, a key factor on chromosome 1B of Chinese Spring restores in its double dose selfed seed fertility to above 25%”
t0“Triticum aestivum cv. Chinese Spring”
Claim · model-written summary
With one dose of Rfo2, a double-dose chromosome 7A factor is needed for fertility restoration above 25%.
- Taxon
- Triticum aestivum cv. Chinese SpringTriticum aestivumt0
- Gene
- a factor on chromosome 7Ae0
- Outcome
- fertility restoratione0
- Qualifier
- both in double dosee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in its single dose the presence of a factor on chromosome 7A and another factor either on chromosome 5A or 5B, both in double dose, is necessary to assure the same level of fertility restoration”
t0“Triticum aestivum cv. Chinese Spring”
Claim · model-written summary
With one dose of Rfo2, a double-dose factor on chromosome 5A or 5B is needed for fertility restoration above 25%.
- Taxon
- Triticum aestivum cv. Chinese SpringTriticum aestivumt0
- Gene
- factor either on chromosome 5A or 5Be0
- Outcome
- fertility restoratione0
- Qualifier
- both in double dosee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in its single dose the presence of a factor on chromosome 7A and another factor either on chromosome 5A or 5B, both in double dose, is necessary to assure the same level of fertility restoration”
t0“Triticum aestivum cv. Chinese Spring”
Claim · model-written summary
Absence of Rfo2 causes complete sterility.
- Taxon
- Triticum aestivum cv. Chinese SpringTriticum aestivumt0
- Gene
- Rfo2e0
- Outcome
- complete sterilitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“absence of the key gene (Rfo2) causes complete sterility”
t0“Triticum aestivum cv. Chinese Spring”
Claim · model-written summary
Chromosome 1A contains modifiers that improve fertility restoration.
- Taxon
- Triticum aestivum cv. Chinese SpringTriticum aestivumt0
- Gene
- chromosome 1Ae0
- Outcome
- fertility restoratione0
- Direction
- improvee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“modifiers which improve the level of fertility restoration to some extent are located on chromosome 1A, 4A and 7D of Chinese Spring”
t0“Triticum aestivum cv. Chinese Spring”
Claim · model-written summary
Chromosome 4A contains modifiers that improve fertility restoration.
- Taxon
- Triticum aestivum cv. Chinese SpringTriticum aestivumt0
- Gene
- 4Ae0
- Outcome
- fertility restoratione0
- Direction
- improvee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“modifiers which improve the level of fertility restoration to some extent are located on chromosome 1A, 4A and 7D of Chinese Spring”
t0“Triticum aestivum cv. Chinese Spring”
Claim · model-written summary
Chromosome 7D contains modifiers that improve fertility restoration.
- Taxon
- Triticum aestivum cv. Chinese SpringTriticum aestivumt0
- Gene
- 7De0
- Outcome
- fertility restoratione0
- Direction
- improvee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“modifiers which improve the level of fertility restoration to some extent are located on chromosome 1A, 4A and 7D of Chinese Spring”
t0“Triticum aestivum cv. Chinese Spring”
Claim · model-written summary
A single Rfo2 dose cannot restore fertility above 25% when other restoration genes are heterozygous.
- Taxon
- Triticum aestivum cv. Chinese SpringTriticum aestivumt0
- Gene
- Rfo2 genee0
- Outcome
- fertilitye0
- Value
- above 25%e0
- Qualifier
- other restoring genes are in heterozygous conditione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the single dose of Rfo2 gene can not restore fertility to above 25% when other restoring genes are in heterozygous condition”
t0“Triticum aestivum cv. Chinese Spring”
Claim · model-written summary
The authors conclude that single-dose Rfo2 has limited use in breeding hybrid wheat and fertile lines with ovata cytoplasm.
- Taxon
- Triticum aestivum cv. Chinese SpringTriticum aestivumt0
- Outcome
- utilization of this gene in breeding both hybrid wheat and bred-true, fertile line with the ovata cytoplasme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“utilization of this gene in breeding both hybrid wheat and bred-true, fertile line with the ovata cytoplasm is greatly limited”
t0“Triticum aestivum cv. Chinese Spring”
Claim · model-written summary
The findings provide another example of linkage between a fertility-restoring gene and a nucleolus-organizing region.
- Taxon
- Triticum aestivum cv. Chinese SpringTriticum aestivumt0
- Outcome
- linkage between fertility- restoring gene and a nucleolus-organizing regione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results provided another example of the linkage between fertility- restoring gene and a nucleolus-organizing region”
t0“Triticum aestivum cv. Chinese Spring”