Vicia sativa

Vicia sativa, known as the common vetch, garden vetch, tare or simply vetch, is a nitrogen-fixing leguminous plant in the family Fabaceae. It is now naturalised throughout throughout the world occurring on every continent, except antarctica and the arctic.[1] The centre of diversity is thought to be the Fertile Crescent, although gold standard molecular confirmation is currently not available.

Vicia sativa
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Faboideae
Tribe: Fabeae
Genus: Vicia
Species:
V. sativa
Binomial name
Vicia sativa

Global Common vetch cultivation is limited due to anti-nutrional compounds in the seed although it is grown in dryland agricultural zones in Australia, China and Ethiopia due to its drought tolerance and very low nutrient requirements compared to other legumes. In these agricultural zones Common Vetch is grown as a green manure, livestock fodder or rotation crop. In cultivated grainfields, like lentils, it is often considered a weed due to downgrading of harvested mixed grain and hence farmers receive less financial returns.

Global estimates of vetch production area varies considerably due to no formal assessment system. However, current cultivation estimates in Australia vary between 400,00 to 600,000 hectares (1,500,000 acres) per year.

Description

Vicia sativa is a sprawling annual herb, with hollow, four-sided, hairless to sparsely hairy stems which can reach two meters in maximum length.

The leaves are stipulate, alternate and compound, each made up of 3–8 opposite pairs of linear, lance-shaped, oblong, or wedge-shaped, needle-tipped leaflets up to 35 millimeters (1+1⁄2 in) long. Each compound leaf ends in a branched tendril.

The pea-like flowers occur in the leaf axils, solitary or in pairs. The flower corolla is 1–3 centimeters (1⁄2–1+1⁄4 in) long and bright pink-purple in colour, more rarely whitish or yellow. The flowers are mostly visited by bumblebees.[2]

The fruit is a legume pod up to 6 or 7 centimeters (2+1⁄4 or 2+3⁄4 in) long, which is hairy when new, smooth later, then brown or black when ripe. It contains 4–12 seeds.[3][4]

  • Common flower.
    Common flower.
  • Rarer white flower
    Rarer white flower
  • Immature fruit
    Immature fruit

Cultivation
Cooked vetch (Vicia sativa)

Sown for fodder,[5] the seed is sown densely, up to 250 kilograms per hectare (220 lb/acre). However, when grown for seed, less seed should be used; otherwise the crop will be too thick, reducing flower and seed production. When meant for seed, sowing is done early in the planting season for good returns; but, when for green manure, any time in spring is suitable. Sometimes, a full crop can be obtained even when sown as late as summer, though sowing so late is not recommended.[6]

After the seed is sown and the land carefully harrowed, a light roller ought to be drawn across, to smooth the surface and permit the scythe to work without interruption. Also, the field should be watched for several days to prevent pigeons from eating too much of the sown seed.[6]

Horses thrive very well on common vetch, even better than on clover and rye grass; the same applies to fattening cattle, which feed faster on vetch than on most grasses or other edible plants. Danger often arises from livestock eating too much vetch, especially when podded; colics and other stomach disorders are apt to be produced by the excessive amounts devoured.[6]

Cereal grains can be sown with vetch so it can use their stronger stems for support, attaching via tendrils.[7] When grown with oats or other grasses, the vetch can grow upright; otherwise its weak stems may sprawl along the ground.[8] Several cultivars are available for agricultural use,[9] and as for some other legume crops, rhizobia can be added to the seed.[8]

Pests that attack this crop include the powdery mildew fungus Erysiphe pisi, the pea aphid Acyrthosiphon pisum, the corn earworm (Heliothis zea), the fall armyworm (Spodoptera frugiperda), and spider mites of genus Tetranychus.[8]

During the early 20th century, a mutant of the common vetch arose with lens-shaped seeds resembling those of the lentil, leading to vetch invasions of lentil fields. D. G. Rowlands showed in 1959 that this was due to a single recessive mutation. The transition from traditional winnowing to mechanised farming practices largely solved this problem.[10]

Improved varieties of Vicia sativa developed by the National Vetch Breeding Program for Australian farmers include; Timok, Volga, Rasina and more recently Studenica. These varieties are mostly cultivated in Western Australia, South Australia and Victoria. More than 500,000 hectares (1,200,000 acres) per year of Vicia sativa was grown in Australia in 2019.

History

Common vetch has long been part of the human diet, as attested by carbonised remains found at early Neolithic sites in Syria, Turkey, Bulgaria, Hungary and Slovakia. It has also been reported from Predynastic sites of ancient Egypt, and several Bronze Age sites in Turkmenia and Slovakia. However, definite evidence for later vetch cultivation is available only for Roman times.[11]

The "tare" referred to in some English translations of the Bible (as in the "Parable of the Tares") may be darnel ryegrass, Lolium temulentum.[12]: 162 

Taxonomy

Vicia sativa was first described by Carl Linnaeus in his 1753 Species Plantarum. Since that time, a number of synonyms have published:[13]

  • Vicia abyssinica Alef.
  • Vicia alba Moench
  • Vicia amphicarpa Dorthes
  • Vicia amphicarpa L.
  • Vicia angustifolia L.
  • Vicia angustifolia Reichard
  • Vicia bacla Moench
  • Vicia bobartii E. Forster
  • Vicia bobartii E.Forst.
  • Vicia bobartii Koch
  • Vicia canadensis Zuccagni
  • Vicia communis Rouy
  • Vicia consobrina Pomel
  • Vicia cordata Hoppe
  • Vicia cornigera Chaub.
  • Vicia cornigera St.-Amans
  • Vicia cosentini Guss.
  • Vicia cuneata Gren. & Godr.
  • Vicia cuneata Guss.
  • Vicia debilis Perez Lara
  • Vicia erythosperma Rchb.
  • Vicia glabra Schleich.
  • Vicia globosa Retz.
  • Vicia heterophylla C.Presl
  • Vicia incisa M.Bieb.
  • Vicia incisaeformis Stef.
  • Vicia intermedia Viv.
  • Vicia lanciformis Lange
  • Vicia lentisperma auctor ign.
  • Vicia leucosperma Moench
  • Vicia macrocarpa Bertol.
  • Vicia maculata C.Presl
  • Vicia maculata Rouy
  • Vicia melanosperma Rchb.
  • Vicia morisiana Boreau
  • Vicia nemoralis Boreau
  • Vicia nemoralis Ten.
  • Vicia notota Gilib.
  • Vicia pallida Baker
  • Vicia pilosa M.Bieb.
  • Vicia pimpinelloides Mauri
  • Vicia segetalis Thuill.
  • Vicia subterranea Dorthes
  • Vicia terana Losa
  • Vicia vulgaris Uspensky

There are at least four generally accepted subspecies:

  • Vicia sativa subsp. cordata (Hoppe) Asch. & Graebn.
  • Vicia sativa subsp. nigra (L.) Ehrh. – narrow-leaved vetch[14] (= subsp. / var. angustifolia, subsp. consobrina, subsp. cordata (Hoppe) Batt., subsp. cuneata, subsp. heterophylla, var. minor, var. nigra)
  • Vicia sativa subsp. sativa (= var. linearis, ssp. notata)
  • Vicia sativa subsp. segetalis (Thuill.) Arcang. (sometimes included in subsp. nigra)

Genome

The Vicia sativa karyotype consists of 5, 6 or 7 chromosomes, with six (n=6) being the most common and best described.[15] Given the Vicia sativa's genome is relatively large genome size (1.75Gb) due to large amounts of repetitive DNA,[15] sequencing the genome was challenging compared to other legumes such as Medicago truncatula or soybeans.

A high-quality chromosome level genome assembly was published in 2021[16][17] of variety Studencia (n=6), following a draft genome assembly of line KSR5 (n=7). Variety Studencia, is predicted to have 53,318 protein coding genes.[17] Whole genome sequence comparisons showed that Vicia sativa is most closely related to pea.[17]

A high-quality genome sequence facilitates the application of genome editing and genomic selection for healthy, higher yielding varieties.

References
  1. Ian C. Murfet and Kristin L. Groom. "Vicia Sativa Aggregate." Handbook of Flowering, Volume VI. Abraham Halevy, ed. CRC Press, 2019. Page . ISBN 9781351089487
  2. van der Kooi, C. J.; Pen, I.; Staal, M.; Stavenga, D. G. & Elzenga, J. T. M. (2015). "Competition for pollinators and intra-communal spectral dissimilarity of flowers". Plant Biology. 18 (1): 56–62. doi:10.1111/plb.12328. PMID 25754608.
  3. Blamey, M.; Fitter, R. & Fitter, A. (2003). Wild flowers of Britain and Ireland: The Complete Guide to the British and Irish Flora. London: A & C Black. p. 142. ISBN 978-1-4081-7950-5.
  4. Stace, C. A. (2010). New Flora of the British Isles (3rd ed.). Cambridge, UK: Cambridge University Press. p. 159. ISBN 978-0-521-70772-5.
  5. Hackney, P., ed. (1992). Stewart and Corry's Flora of the North-east of Ireland (3rd ed.). Queen's University Belfast. ISBN 0-85389-446-9.
  6. The Household Cyclopedia of General Information. New York: Thomas Kelly. 1881. p. 47.
  7. "FAO Animal Feed Resources". Archived from the original on 2012-10-24. Retrieved 2010-11-22.
  8. "FAO Crop Profile". Archived from the original on 2017-11-15. Retrieved 2010-11-22.
  9. Lloveras, J.; Santiveri, P.; Vendrell, A.; Torrent, D.; Ballesta, A. (2004). "Varieties of vetch (Vicia sativa L.) for forage and grain production in Mediterranean areas" (PDF). In A. Ferchichi (ed.). Réhabilitation des pâturages et des parcours en milieux méditerranéens. Cahiers Options Méditerranéennes. Vol. 62. Zaragoza: CIHEAM. pp. 103–106. Archived from the original (PDF) on 2017-03-24. Retrieved 2010-11-22.
  10. Fred Gould (1991). "The evolutionary potential of crop pests" (PDF). American Scientist. 79 (6): 496–507. Bibcode:1991AmSci..79..496G.
  11. Daniel Zohary; Maria Hopf (2000). Domestication of Plants in the Old World (3rd ed.). Oxford University Press. p. 119. ISBN 978-0-19-850356-9.
  12. Cope, T.; Gray, A. (2009). Grasses of the British Isles. BSBI Handbook No. 13. London: Botanical Society of Britain and Ireland. ISBN 978-0-901158-42-0.
  13. "Vicia sativa L." The Plant List. Retrieved 24 March 2017.
  14. BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
  15. NAVRÁTILOVÁ, ALICE; NEUMANN, PAVEL; MACAS, JIŘÍ (June 2003). "Karyotype Analysis of Four Vicia Species using In Situ Hybridization with Repetitive Sequences". Annals of Botany. 91 (7): 921–926. doi:10.1093/aob/mcg099. ISSN 0305-7364. PMC 4242401. PMID 12770847.
  16. Xi, Hangwei; Nguyen, Vy; Ward, Christopher; Liu, Zhipeng; Searle, Iain R. (2021-10-13). "Chromosome-level assembly of the common vetch reference genome (Vicia sativa)": 2021.10.11.464017. doi:10.1101/2021.10.11.464017. S2CID 239012084. {{cite journal}}: Cite journal requires |journal= (help)
  17. Xi, Hangwei; Nguyen, Vy; Ward, Christopher; Liu, Zhipeng; Searle, Iain R. (2022-01-31). "Chromosome-level assembly of the common vetch (Vicia sativa) reference genome". Gigabyte. 2022: gigabyte38. doi:10.46471/gigabyte.38. PMC 9650280. PMID 36824524. S2CID 246453086.
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