Abstract
The genetic basis of cultivated soybean is rather narrow. This observation has been confirmed by analysis of agronomic traits among different genotypes, and more recently by the use of molecular markers. During the construction of an RFLP soybean map (Glycine soja x Glycine max) the two progenitors were analyzed with over 2,000 probes, of which 25% were polymorphic. Among the probes that revealed polymorphisms, a small proportion, about 0.5%, hybridized to regions that were highly polymorphic. Here we report the sequencing and analysis of five of these probes. Three of the five contain segments that encode leucine-rich repeat (LRR) sequence homologous to known disease resistance genes in plants. Two other probes are relatively AT-rich and contain segments of (A)n/(T)n. DNA segments corresponding to one of the probes (A45-10) were amplified from nine soybean genotypes. Partial sequencing of these amplicons suggests that deletions and/or insertions are responsible for the extensive polymorphism observed. We propose that genes encoding LRR proteins and simple sequence repeat region prone to slippage are some of the most hypervariable regions of the soybean genome.
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Claims 5
Claim · model-written summary
Three of five sequenced soybean probes contain LRR-encoding segments homologous to disease resistance genes.
- Taxon
- soybean
Glycine maxt0 - Outcome
- segments that encode leucine-rich repeat (LRR) sequencee1
- Value
- Three of the fivee1
- Qualifier
- homologous to known disease resistance genes in plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hypervariable regions in the soybean genome”
e1“Three of the five contain segments that encode leucine-rich repeat (LRR) sequence homologous to known disease resistance genes in plants”
Claim · model-written summary
Two soybean probes are relatively AT-rich and contain (A)n/(T)n segments.
- Taxon
- soybeanGlycine maxt0
- Outcome
- relatively AT-riche2
- Qualifier
- contain segments of (A)n/(T)ne2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hypervariable regions in the soybean genome”
e2“Two other probes are relatively AT-rich and contain segments of (A)n/(T)n”
Claim · model-written summary
About 0.5% of polymorphic soybean probes hybridized to highly polymorphic regions.
- Taxon
- soybeanGlycine maxt0
- Outcome
- hybridized to regions that were highly polymorphice3
- Value
- about 0.5%e3
- Qualifier
- a small proportione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hypervariable regions in the soybean genome”
e3“a small proportion, about 0.5%, hybridized to regions that were highly polymorphic”
Claim · model-written summary
Deletions and/or insertions are suggested to be responsible for the extensive polymorphism in soybean probes.
- Taxon
- soybeanGlycine maxt0
- Outcome
- extensive polymorphisme4
- Qualifier
- deletions and/or insertionse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hypervariable regions in the soybean genome”
e4“Partial sequencing of these amplicons suggests that deletions and/or insertions are responsible for the extensive polymorphism observed”
Claim · model-written summary
LRR-encoding genes and simple sequence repeat regions prone to slippage are among the most hypervariable regions of the soybean genome.
- Taxon
- soybeanGlycine maxt0
- Gene
- genes encoding LRR proteinse5
- Outcome
- hypervariable regionse5
- Qualifier
- simple sequence repeat region prone to slippagee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hypervariable regions in the soybean genome”
e5“genes encoding LRR proteins and simple sequence repeat region prone to slippage are some of the most hypervariable regions of the soybean genome”