Abstract
Abstract Use of self‐incompatibility (SI) as a pollination control method for Brassica napus hybrid production requires the development of a sufficient number of S‐alleles that are expressed consistently in a range of B. napus lines. Self‐incompatibility (SI) alleles have been transferred from Brassica oleracea and Brassica rapa into B. napus var. oleifera. An understanding of expression of these alleles in B. napus is essential for their commercial use. Four SI B. napus doubled haploids containing the B. oleracea S‐alleles S2, S5, S13 and S24 were crossed to three B. napus cultivars to measure the B. napus genetic background effect on S‐allele expression. A line x tester analysis indicated that the largest source of variation in the expression rate of SI was the S‐allele itself. The B. napus genotypes tested contained modifier gene(s), some that enhanced SI expression and others that inhibited SI expression. The B. napus Canadian cultivar ‘Westar’ generally had a negative effect on SI expression while the European cultivar ‘Topas’ had a positive effect on the B. oleracea S‐allele expression. The B. oleracea S‐allele S24 was very similar in expression to the B. rapa allele W1. The application of these results for the use of B. oleracea S‐alleles for hybrid production in B. napus is discussed.
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Claims 5
Claim · model-written summary
S-allele identity was the largest source of variation in self-incompatibility expression rate.
- Taxon
- Brassica napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Gene
- S‐allelee0
- Outcome
- expression rate of SIe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“the largest source of variation in the expression rate of SI was the S‐allele itself”
t0“Development of self‐incompatible Brassica napus: (III) B. napus genotype effects on S‐allele expression”
Claim · model-written summary
The tested B. napus genotypes carried modifier genes that enhanced or inhibited SI expression.
- Taxon
- B. napusBrassica napuse0
- Gene
- modifier gene(s)e0
- Outcome
- SI expressione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The B. napus genotypes tested contained modifier gene(s), some that enhanced SI expression and others that inhibited SI expression”
Claim · model-written summary
Westar generally had a negative effect on SI expression.
- Taxon
- B. napusBrassica napuse0
- Material
- ‘Westar’e0
- Outcome
- SI expressione0
- Direction
- negative effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The B. napus Canadian cultivar ‘Westar’ generally had a negative effect on SI expression”
Claim · model-written summary
Topas had a positive effect on B. oleracea S-allele expression.
- Taxon
- B. napusBrassica napust0
- Material
- ‘Topas’e0
- Gene
- B. oleracea S‐allelee0
- Outcome
- B. oleracea S‐allele expressione0
- Direction
- positive effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the European cultivar ‘Topas’ had a positive effect on the B. oleracea S‐allele expression”
t0“Development of self‐incompatible Brassica napus: (III) B. napus genotype effects on S‐allele expression”
Claim · model-written summary
The B. oleracea S24 allele had expression very similar to the B. rapa W1 allele.
- Taxon
- B. napusBrassica napust0
- Gene
- B. oleracea S‐allele S24e0
- Outcome
- expressione0
- Direction
- very similare0
- Comparator
- B. rapa allele W1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The B. oleracea S‐allele S24 was very similar in expression to the B. rapa allele W1”
t0“Development of self‐incompatible Brassica napus: (III) B. napus genotype effects on S‐allele expression”