Juglans sigillata
| Juglans sigillata | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fagales |
| Family: | Juglandaceae |
| Genus: | Juglans |
| Section: | Juglans sect. Juglans |
| Species: | J. sigillata
|
| Binomial name | |
| Juglans sigillata | |
Juglans sigillata (Chinese: 泡核桃), also called iron walnut,[1] is the second most cultivated species of walnut tree after the Persian walnut Juglans regia. Commonly distributed in the eastern Himalayas and western China. The tree has been cultivated for its edible nuts, and there are at least 80 authorised or approved cultivars produced after successful implementation of grafting technology.[2]
This plant was first detected by the Chinese botanist Kuang Keren (K.Z. Kuang) and Lu Anmin (A.M.Lu) in 1979,[1] named after a French botanist Louis-Albert Dode.[3]
The nuts are oval-shaped with bumps and seal-like depressions (sigillatae) in the shell, and with its thick shell the species has been termed the "iron walnut". The tree is also used for its wood. It is commonly found in Yunnan, China's top walnut producing region in terms of acreage and yield,[4] but are also found in Guizhou, Sichuan and Xizang in China. It is sometimes grown in gardens and parks as an ornamental plant.
A 536.50-Mb genome has been sequenced to provide a solid foundation for additional genomic studies in nut crops and related species, as well providing valuable resources for plant breeders. Demonstrating an estimated divergence time between J. sigillata and the more widely cultivated Juglans regia 49 million years ago.[5]
References
- ^ a b Xian-Yun Mu, Miao Sun, Pei-Fang Yang, and Qin-Wen Lin (Oct 9, 2017). "Unveiling the Identity of Wenwan Walnuts and Phylogenetic Relationships of Asian Juglans Species Using Restriction Site-Associated DNA-Sequencing". Frontiers in Plant Science. 8: 1708. doi:10.3389/fpls.2017.01708. PMC 5641410. PMID 29067029.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ Zhang, Y (2004). "Germplasm resource of walnut in Yunnan and its exploitation and utilization". J Northwest for Univ. 19 (2): 38–40.
- ^ John M. Grimshaw."Notes on the temperate species of Juglans". Dendrology.org. Retrieved August 5, 2020.
- ^ "China Forestry Yearbook 2017 | China YearBooks". Retrieved 2020-03-09.
- ^ Ning, De-Lu; Wu, Tao; Xiao, Liang-Jun; Ma, Ting; Fang, Wen-Liang; Dong, Run-Quan; Cao, Fu-Liang (2020-02-01). "Chromosomal-level assembly of Juglans sigillata genome using Nanopore, BioNano, and Hi-C analysis". GigaScience. 9 (2). doi:10.1093/gigascience/giaa006. PMC 7043058. PMID 32101299.
External links
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