Biology: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 Dode
| |
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
- ↑ 1.0 1.1 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. PMID 29067029.
- ↑ 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. http://dendrology.org/publications/general-articles/juglans-notes-on-the-temperate-species-of-john-m-grimshaw-2003/.
- ↑ "China Forestry Yearbook 2017 | China YearBooks" (in en-US). https://www.chinayearbooks.com/china-forestry-yearbook-2017.html.
- ↑ 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" (in en). GigaScience 9 (2). doi:10.1093/gigascience/giaa006. PMID 32101299.
External links
Wikidata ☰ Q958336 entry
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