Yael (Grape)
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| Yael | |
|---|---|
| Grape (Vitis) | |
| Color of berry skin | Noir |
| Species | Vitis vinifera subsp. sativa |
| Origin | Israel (Nitzanim / Nitzan, Southern Coastal Plain) |
| Notable regions | Israel (Golan Heights, Southern Coastal Plain, Samaria/Ariel) |
| Notable wines | Barkan Wine Cellars Beta Yael Red |
| Hazards | Early bud break; sensitive to prolonged late-season soil water depletion |
| VIVC number | [ Lua error in Module:WikidataIB at line 665: attempt to index field 'wikibase' (a nil value).] |
Yael (Script error: The function "langx" does not exist., lit. ibex; also marketed and known enologically as Yael Red or Yael Adom, יעל אדום, and catalogued in academic germplasm collections as Yael-19 or Nitzan 3) is an indigenous Israeli black (red) wine grape variety (Vitis vinifera subsp. sativa).[1][2][3] It was rediscovered in the early 2010s during a nationwide genetic and ampelographic survey of surviving indigenous grapevines in Israel, where a small number of uncultivated feral vines were found climbing on trees in the coastal sand dunes near Nitzan and Nitzanim on the southern Israeli Mediterranean coast.[1][4][3]
Unlike most surviving Levantine heirloom cultivars—which were selected over centuries of Islamic alcohol prohibition for large berries and table grape consumption—Yael produces small clusters of small, blue-black berries with high color density and elevated polyphenolic content characteristic of specialized wine cultivars.[1][4] In experimental micro-vinifications published in Scientific Reports in 2017, Yael was identified alongside Sorek and Misla as one of the top indigenous red sativa genotypes for quality winemaking, exhibiting higher color density than reference Israeli Cabernet Sauvignon and traditional Bituni wines.[1] Following virus sanitation and clonal propagation into a vineyard at Avnei Eitan in the Golan Heights, Barkan Wine Cellars released the first modern commercial single-varietal wine made from the cultivar under its artisanal Beta series.[4][3][5]
History and discovery
Historical background of Southern Levantine red wine grapes
Archaeological and historical evidence demonstrates that winemaking in the Southern Levant dates back to the Chalcolithic and Early Bronze Age, reaching industrial export scale during the Roman and Byzantine periods (4th–7th centuries CE), when coastal ports such as Yavne-Yam, Ashkelon, and Gaza exported regional wines across the Mediterranean basin.[1][6][7] Following the Muslim conquest of the Levant in the 7th century CE and the strict enforcement of prohibitions on winemaking under the Mamluk Sultanate in the 13th century, commercial wine vineyards were uprooted or converted to food production (table grapes, raisins, dibs grape syrup, and vinegar).[1][4] Consequently, dedicated red wine cultivars—which typically have small, seedy berries and thick or tannic skins unsuited for fresh table consumption—were abandoned by farmers and survived only as isolated feral plants in sand dunes, wadis, and ruins.[1][4][8]
When modern Israeli winemaking was established in the late 19th century by Baron Edmond James de Rothschild, agronomists imported French and Western European cultivars (such as Carignan, Cabernet Sauvignon, and Merlot), leaving indigenous Levantine wine varieties largely unexplored for over a century.[1][7][8]
Rediscovery in the Nitzanim dunes
Between 2011 and 2015, a research team led by Elyashiv Drori at Ariel University and the Eastern Regional R&D Center—supported by the Jewish National Fund (KKL-JNF) and the Israeli Ministry of Science—conducted a systematic nationwide survey from the Golan Heights and Sea of Galilee to the Negev desert and southern Mediterranean coast to locate and characterize surviving autochthonous grapevines.[1][4] During fieldwork in the coastal sand dunes near Nitzan and Nitzanim (in the southern Israeli Coastal Plain, between Ashdod and Ashkelon), the researchers discovered a small number of uncultivated grapevines growing wild and climbing on trees in a saline, sandy habitat.[1][4][3]
Genetic profiling confirmed that the vines represented a previously unrecorded cultivated genotype (Vitis vinifera subsp. sativa), initially designated in laboratory records under accession codes Yael-19 and Nitzan 3 (Yael), and given the Hebrew varietal name Yael (יעל).[1][2][4] Cuttings were grafted onto 140 Ruggeri rootstock and planted between 2013 and 2015 in the Israeli Indigenous Grapevine Rescue Collection at Ariel (32°06′25″N 35°11′50″E / 32.107036°N 35.197169°E
), alongside 95 other unique local accessions.[2] Following multi-year evaluations of sugar accumulation, acidity, and phenolic potential, Yael was chosen as one of ten elite indigenous varieties to undergo virus sanitation for commercial vineyard release.[4][5][9]
Genetic profile and phylogenetics
Microsatellite (SSR) genotyping and population structure
In the 2017 population genetics study by Drori et al., Yael was analyzed as part of 372 collected grapevine accessions across Israel using 22 polymorphic microsatellite (Simple Sequence Repeat, or SSR) markers, beginning with a 10-locus screening panel (VVMD27, VVMD28, VVS2, VVMD7, VMC1B11, VVMD32, VVMD5, VrZAG62, VVMD25, and VrZAG79) and expanded by 12 additional SSR loci.[1] Pairwise comparison against the European Vitis Database and international reference panels established that Yael is one of 42 unique, previously undocumented feral V. vinifera subsp. sativa genotypes within the 126 unique genotypes identified in Israel (61 sativa and 65 wild sylvestris).[1]
Across the 22 SSR loci, the Israeli sativa group exhibited high allelic richness and genetic diversity (mean 11.41 alleles per locus, 5.40 effective alleles, observed heterozygosity $H_o = $0.73, unbiased expected heterozygosity $H_e = $0.77, and inbreeding coefficient $F = $0.06).[1] Bayesian clustering (STRUCTURE) and neighbor-joining phylogenetic trees revealed that the Israeli sativa population divides into two primary clades: one encompassing traditional cultivated table grapes preserved by local agricultural communities, and a second comprising feral sativa genotypes (such as Yael, Be'er, Sorek, and Misla) recovered from uncultivated habitats.[1]
Evolutionary lineage and cataloguing
When compared against 278 Eurasian grapevine genotypes representing European, Georgian, Iranian, and Central Asian populations, the Israeli sativa and sylvestris clusters grouped closely together and aligned with Near Eastern and Middle Asian germplasm rather than Western European proles occidentalis wine varieties.[1] Whole-genome resequencing of the Israeli collection subsequently confirmed that Southern Levantine grapevines experienced an independent domestication and demographic history distinct from European wine lineages.[2][10] In the Vitis International Variety Catalogue (VIVC), the prime name Yael is assigned variety number 24257 under Vitis vinifera Linné subsp. sativa (origin: Israel, berry skin color: noir).[11]
Morphology and ampelography
Cluster and berry morphology
Ampelographic characterization of Yael was conducted in situ and at the Ariel University germplasm collection using 17 standardized International Organisation of Vine and Wine (OIV) descriptors (OIV 4, 51, 53, 67, 68, 75, 79, 80, 84, 151, 202, 204, 206, 208, 209, 220, and 223) and six primary carpological OIV fruit traits (bunch length, bunch shape, bunch density, berry shape, berry length, and berry skin color).[1][2]
Morphologically, Yael exhibits classic wine-grape architecture rather than the large-clustered table-grape morphology typical of Levantine varieties such as Dabouki or Marawi:
- Clusters: Small, relatively compact bunches with short-to-medium peduncles.[1][2][4]
- Berries: Small, round-to-short-ellipsoid berries with blue-black (noir) skin, high skin-to-pulp ratio, and concentrated pigment accumulation.[2][4]
- Flowers and foliage: As a member of V. vinifera subsp. sativa, Yael bears perfect hermaphrodite (synecious) flowers (OIV 151) and mature leaves displaying pronounced adaxial (upper-surface) blistering (OIV 75) and uniform lobing compared to wild sylvestris vines.[1]
Phenology and viticultural physiology
Phenological sequence
Comprehensive phenological monitoring conducted across the Israeli indigenous germplasm collection (tracking bud break, flowering initiation, fruit set, and veraison from January to July following the Coombe scale) established that Yael (studied as Nitzan 3 / Yael) is an early-budding and early-blooming cultivar.[2] Its bud break and initial vegetative canopy development occur approximately 30 to 40 days earlier in the spring than late-blooming local landraces such as Shami and Batar Nitzanim, though its fruit-set and ripening trajectory converge toward mid-season.[2]
Physiological response to drought stress
In a 2019 physiological study published in Plants (Shecori et al., 2022), 33 indigenous Israeli grapevine varieties (132 vines, four replicates per variety) were subjected to a 10-week summer drought-stress regime to evaluate midday stem water potential ($\Psi_{\text{stem}$), stomatal conductance ($g_s$), and net photosynthetic carbon assimilation ($A_n$).[2] Using k-means clustering, Yael (Nitzan 3) and the white coastal cultivar Be'er clustered together into a distinct physiological response group (Group 2), characterized by:[2]
- Rapid stomatal regulation: Because Yael breaks bud early and sustains an active transpiring canopy for roughly 40 additional days in spring, it depletes winter rhizosphere moisture earlier after irrigation cessation, reaching more negative midday stem water potential ($\Psi_{\text{stem}} < -1.2\text{ to }-1.5\text{ MPa}$) and rapidly closing its stomata (lowering $g_s$) during prolonged summer drought.[2]
- Intrinsic water-use efficiency: In linear regression models comparing stomatal conductance ($g_s$) to photosynthetic rate ($A_n$), Yael exhibited a significantly lower slope ($\approx $18.05, similar to Be'er at $\approx $17.92) than late-budding drought-stable cultivars such as Batar Nitzanim ($$24.01) and Shami ($$23.29), indicating that Yael transpires less water per unit of fixed carbon.[2]
While originally adapted to surviving in coastal sand dunes with access to shallow coastal groundwater tables, in commercial viticulture Yael benefits from regulated deficit drip irrigation during mid-to-late summer to prevent excessive water stress prior to harvest.[2][3]
Enological characteristics and winemaking
Micro-vinification and chemical parameters
In the foundational 2014 micro-vinification trials reported by Drori et al. (2017), grapes harvested from feral Yael vines (accession Yael-19) were destemmed, crushed, and fermented at 25 °C using Saccharomyces cerevisiae strain BDX with eight days of skin maceration (three cap punch-downs daily) and subsequent malolactic fermentation.[1] Chemical and spectrophotometric analysis six months after fermentation demonstrated that Yael-19 possessed superior color intensity compared to both traditional local red cultivars and reference Israeli Cabernet Sauvignon:[1]
| Cultivar / Accession | Ethanol (% ABV) | Wine pH | Titratable Acidity (g/L) | Color Density (AU$, A_{520}+A_{420}$) | Color Hue ($A_{420}/A_{520}$) | Total Phenols (mg/L) |
|---|---|---|---|---|---|---|
| Yael (Yael-19) | 11.0 | 3.62 | 3.8 | 7.2 | 0.6 | 729.5 |
| Bituni (indigenous reference) | 11.5 | 4.20 | 2.3 | 1.8 | 0.8 | 511.1 |
| Cabernet Sauvignon (Shilo reference) | 13.6 | 3.73 | 5.5 | 5.0 | 0.8 | 927.8 |
Phenolic and proanthocyanidin composition
Detailed metabolic profiling of berries harvested at 20 °Brix using reverse-phase HPLC with diode-array detection and phloroglucinolysis (Shecori et al., 2022) showed that, among 14 indigenous black grape varieties in the Israeli collection, Yael contains moderate concentrations of monomeric anthocyanins, hydroxycinnamates, and proanthocyanidins (condensed tannins), coupled with a high mean degree of polymerization (mDP) of flavan-3-ol subunits.[2] In enological terms, this high tannin polymerization and moderate hydroxycinnamate profile impart structured astringency, pleasant bitterness, and firm mouthfeel reminiscent of Italian Sangiovese.[2][4]
Commercial wine production and sensory profile
Following clonal propagation from the Nitzanim mother vines, Barkan Wine Cellars—under the direction of chief winemaker MW Ido Lewinsohn—planted a small single-vineyard plot of Yael at Avnei Eitan in the southern Golan Heights (as well as maintaining coastal plantings) and released the first commercial single-varietal wines from the cultivar: Barkan Beta Yael Red (ברקן בטא יעל אדום, released in 2021/2022 and 2023 vintages).[3][12][13]
In commercial vinification, the grapes are hand-harvested in the early morning, fermented in small stainless-steel tanks, and aged for 12 months in 500-litre French oak barrels, producing a dry red wine of 13.0–13.5% ABV.[3][12][14] Tasting notes describe the varietal wine as deep crimson-red in color, medium-bodied with fresh natural acidity and savory, slightly rustic tannins, displaying aromas of ripe red and black cherry, plum, wild berries, Mediterranean herbs, cracked black pepper, and subtle smoky oak.[4][3][12][14]
See also
- Israeli wine
- Be'er
- Bituni
- Marawi
- Argaman
- Tzuriman (grape)
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.20 1.21 Drori, Elyashiv; Rahimi, Oshrit; Marrano, Annarita; Henig, Yakov; Brauner, Hodaya; Salmon-Divon, Mali; Netzer, Yishay; Prazzoli, Maria Lucia; Stanevsky, Maria; Failla, Osvaldo; Weiss, Ehud; Grando, Maria Stella (17 March 2017). "Collection and characterization of grapevine genetic resources (Vitis vinifera) in the Holy Land, towards the renewal of ancient winemaking practices". Scientific Reports. 7 (1). Bibcode:2017NatSR...744463D. doi:10.1038/srep44463. PMC 5358690. PMID 28303928. Unknown parameter
|article-number=ignored (help) - ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 Shecori, Shani; Kher, Mafatlal M.; Tyagi, Kamal; Lerno, Larry; Netzer, Yishai; Lichter, Amnon; Ebeler, Susan E.; Drori, Elyashiv (28 September 2022). "A Field Collection of Indigenous Grapevines as a Valuable Repository for Applied Research". Plants. 11 (19). Bibcode:2022Plnts..11.2563S. doi:10.3390/plants11192563. PMC 9570891 Check
|pmc=value (help). PMID 36235429 Check|pmid=value (help). Unknown parameter|article-number=ignored (help) - ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 "יעל אדום The Beta Series" [Yael Red – The Beta Series]. Barkan Wine Cellars (in עברית). Retrieved 15 October 2026.
- ↑ 4.00 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.08 4.09 4.10 4.11 4.12 Shafrir, Natalie (11 September 2022). "Ancient World Wine, New Wine Culture". Asif: Culinary Institute of Israel. Retrieved 15 October 2026.
- ↑ 5.0 5.1 Eitan, Mira (3 October 2022). "מורשת יין: הקאמבק של זני הענבים הקדומים" [Wine Heritage: The Comeback of Ancient Grape Varieties]. Walla! Food (in עברית). Retrieved 15 October 2026.
- ↑ Schmidt, Joshua; Bar-Oz, Guy (28 August 2024). "Propagating Terroir Revival in the Negev: How the Wine Industry Can Amplify Its Resilience to Climate Adversity through a Deeper Understanding of Historic Dryland Viticulture". Horticulturae. 10 (9). doi:10.3390/horticulturae10090917. Unknown parameter
|article-number=ignored (help) - ↑ 7.0 7.1 Ben Eliyahu, Yedidya; Karlinsky Tzur, Maayan (16 September 2023). "דרושים: זני ענבים מחודשים לעולם מתחמם" [Wanted: Renewed Grape Varieties for a Warming World]. Ynet (in עברית). Davidson Institute of Science Education. Retrieved 15 October 2026.
- ↑ 8.0 8.1 Henig, Yakov. "זני גפן עתיקים בארץ ישראל" [Ancient Grapevine Varieties in the Land of Israel]. Deshen Gat (in עברית). Retrieved 15 October 2026.
- ↑ "זני היין הישראלים" [The Israeli Wine Varieties]. MyYain (in עברית). Retrieved 15 October 2026.
- ↑ Sivan, Aviad; Rahimi, Oshrit; Lubin, Bat-Chen; Salmon-Divon, Mali; Weiss, Ehud; Drori, Elyashiv; Hübner, Sariel (2021). "Genomic evidence supports an independent history of Levantine and Eurasian grapevines". Plants, People, Planet. 3 (4): 414–427. Bibcode:2021PlPP....3..414S. doi:10.1002/ppp3.10197. Retrieved 15 October 2026.
- ↑ "Bibliography and Passport Data: YAEL (VIVC Variety Number 24257)". Vitis International Variety Catalogue (VIVC). Julius Kühn-Institut. Retrieved 15 October 2026.
- ↑ 12.0 12.1 12.2 "ברקן בטא יעל 2023 (Barkan Beta Yael 2023)". Legima (in עברית). Retrieved 15 October 2026.
- ↑ "ברקן בטא יעל 2021/2022" [Barkan Beta Yael 2021/2022]. Kiddush (in עברית). Retrieved 15 October 2026.
- ↑ 14.0 14.1 "ברקן בטא יעל – יין אדום נדיר מזן יעל" [Barkan Beta Yael – Rare Red Wine from the Yael Variety]. HaMesameach (in עברית). Retrieved 15 October 2026.
External links
- Yael Red – The Beta Series at Barkan Wine Cellars (in Hebrew)
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