What can a wild Medicago genome teach about stress tolerance?
A highly complete Medicago ruthenica genome provides genetic resources for environmental-stress tolerance missing from yield-focused cultivated alfalfa.
Source
The genome of a wild Medicago species provides insights into the tolerant mechanisms of legume forage to environmental stress
Study at a glance
- Design
- Computational / modelling — De novo assembly/annotation of Medicago ruthenica with stress-trait comparisons to cultivated legumes
- N
- ~914 Mb estimated genome; PacBio/Illumina assembly resource — not a sample-N study
- Population
- Wild Medicago ruthenica
- Outcome
- Genome features linked to stress tolerance for alfalfa improvement
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What can a wild Medicago genome teach about stress tolerance?
These passages occur verbatim in the stored paper text. They support the points listed below; they do not verify every statement in the explanation.
Which species’ genome was assembled?
Medicago ruthenica (L.) Trautv., an allogamous diploid (2 n =2 x =16) perennial legume forage, is a native grassland species widely distributed in hillsides, embankments, mixed grass steppes, and meadows of Sib
What problem does domestication create for alfalfa?
The great attention paid to the traits associated with high yield during long-term domestication of cultivated alfalfa may render the cultivated alfalfa less tolerant to
What they did
Assembled/annotated the M. ruthenica genome and compared stress-related genomic features to cultivated legumes.
What they found
Highly complete genome assembly; wild species retains tolerance traits diluted by domestication for yield; useful for breeding stress-tolerant alfalfa.
The limits
What it doesn't show
Does not alone deliver a finished commercial cultivar.
Key terms
- Medicago ruthenica
- Wild diploid perennial forage legume.
- Domestication
- Human selection often favoring yield over stress hardiness.
- Stress tolerance
- Ability to withstand harsh environments.
- Genome assembly
- Reconstructed reference genome sequence.
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Species sequenced
Common questions
Species?
Medicago ruthenica.
Why wild genome?
Tolerance genes diluted in cultivated alfalfa.
Assembly quality claim?
Highly complete.
Use?
Breeding stress-tolerant forages.
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