Russia's Channel One state television reported that Pavel Dmitrichenko's girlfriend, also a Bolshoi dancer, was known to have been at odds with director Sergei Filin over the parts she was being given.
Other media said Dmitrichenko himself had missed out on several top roles at the theatre.
The 29-year-old from from Moscow has danced in the Bolshoi Theatre troupe since 2002 and was to dance in "Sleeping Beauty" this month.
He could now face jail and possibly the end of his dance career.
More top news
Most of the UK will have a mixture of sunny spells and scattered showers before becoming drier in the afternoon.
Scottish people celebrate the birthday of national writer Robert Burns with events including haggis throwing and the Big Burns Supper.
There will be a rare chance to see an asteroid pass so close to the Earth you will be able to see it with binoculars on Monday night.