Genetics and Breeding of Dalbergia sissoo

Hassan, Mariam; Ijaz, Siddra; Sarwar, Sehrish; Khan, Ali Hassan

doi:10.1201/9781003175940-9

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“…This indicates that further research is needed to explore the pathological cause of the disease by employing conventional and molecular pathological techniques ( Ijaz et al, 2020 ). Numerous studies attempted to elucidate the biology of D. sissoo dieback ( Hassan et al, 2021 ). Several fungal pathogens, including Botryodiplodia theobromae, Fusarium spp., Ganoderma lucidum, Phytophthora cinnamomi, and Ceratocystis, have been linked to dieback and mortality on D. sissoo plantations.…”

Section: Introductionmentioning

confidence: 99%

Phylogenomics resolves the etiology of dieback disease and deciphers Ceratocystis dalbergicans sp.nov., causal agent of Dalbergia sissoo decline

Haq

Ijaz²,

Latif³

et al. 2023

Front. Genet.

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Dalbergia sissoo is one of the most economically important trees in forestry, agroforestry, and horticulture. This tree species is severely threatened by dieback. Widespread dieback outbreaks and infestations have drastically destroyed billions of D. sissoo trees. Hence, we attempted to resolve the dieback etiology through phylogenomics associated with D. sissoo mortality. The Ceratocystis species was evaluated using morphologically investigated fungal isolates collected from dieback-affected tissue plants. Based on the symptomatology, we have differentiated dieback from Fusarium wilt and concluded that the Ceratocystis fimbriata sensu lato complex is causing shisham dieback in Pakistan. As the Ceratocystis species complex is a cryptic species complex, we used genomics and phylogenetic analysis for deciphering its evolutionary hierarchical order. The pathogen’s operational taxonomy was unlocked with the help of phylogenomics, and it was discovered that isolates from D. sissoo represent a species distinct from the other species in the C. fimbriata sensu lato species complex. The name Ceratocystis dalbergicans sp. nov. has been given to the fungus causing dieback disease in D. sissoo.

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Section: Introductionmentioning

confidence: 99%