Faba bean necrotic stunt virus (FBNSV) (genus Nanovirus; family Nanoviridae) is a multipartite virus comprising eight circular single-stranded DNA components, each about 1 kb in length. Also, two alphasatellites have often been reported to be associated with FBNSV infection. The only full-length genome sequence of an Iranian FBNSV isolate, FBNSV-[IR;Ka:FB], so far reported is one infecting faba bean (Vicia faba L.). To obtain more information about Iranian isolates of FBNSV (FBNSV-IRs) and their diversity, the full-length genome of four FBNSV isolates and associated alphasatellites obtained from faba bean (two isolates), common bean (Phaseolus vulgaris L., one isolate) and chickpea (Cicer arietinum L., one isolate) were characterized. All genomic components except U4 had the expected size in accordance with the FBNSV genomic sequences published in the GenBank. The component U4 had an additional stretch of 16 nucleotides (nts 765–780) in its non-coding region (NCR). Alphasatellites of the aforementioned isolates showed 98–100% sequence identity. Intra-component sequence analyses of FBNSV-IRs indicated a range of 98 to 100% nt identity between each single FBNSV-IRs component or between their associated alphasatellites. DNA-M and DNA-U2 exhibited the highest value of diversity, sharing 98–99% identity. Phylogenetic analyses indicated that FBNSV-IRs were clustered with a Moroccan isolate and some Azerbaijani isolates of FBNSV forming a clade distinct from Ethiopian isolates. Inter-component sequence analyses of NCRs revealed the DNA-S and DNA-U4 subgrouped together in all FBNSV-IRs isolates except the chickpea isolate in which NCRs of DNA-S and DNA–U4 formed separate subgroups.

蚕豆坏死矮化病毒（FBNSV）（属Nanovirus ;家庭矮化病毒科）是包含约在长度为1kb 8环状单链DNA组成，每一个多态病毒。此外，经常有两个α卫星与FBNSV感染有关。迄今为止，伊朗FBNSV分离株的唯一全长基因组序列FBNSV- [IR; Ka：FB]是一种感染蚕豆（蚕豆）。为了获得有关伊朗FBNSV分离株（FBNSV-IRs）及其多样性的更多信息，从蚕豆（两种分离株），普通豆（菜豆（Phaseolus vulgaris L.，一种分离株））获得的四种FBNSV分离株和相关α卫星的全长基因组。和鹰嘴豆（Acerinum）L.，一种分离株）被表征。根据GenBank中公布的FBNSV基因组序列，除U4以外的所有基因组成分均具有预期的大小。成分U4在其非编码区（NCR）中具有16个核苷酸（核苷酸765-780）的额外延伸。上述分离物的卫星卫星显示出98-100％的序列同一性。FBNSV-IR的组分内序列分析表明，每个单个FBNSV-IR组分之间或与其相关的α卫星之间的同源性在98％到100％之间。DNA-M和DNA-U2表现出最高的多样性，具有98-99％的同一性。系统发育分析表明，FBNSV-IRs与摩洛哥分离株和一些阿塞拜疆FBNSV分离株聚集在一起，形成了不同于埃塞俄比亚分离株的进化枝。