Taiwanese netbook PC pioneer Asustek trimmed its revenue growth forecast for the second quarter on Thursday, according to two analyst notes, attributing it to a delay in the launch of the new Nexus 7 tablet co-branded with Google.

Two analyst notes to clients seen by Reuters said that Asustek lowered second-quarter revenue forecast on Thursday to 0-5 per cent quarter-on-quarter growth from 5-10 per cent previously forecast.

The news sent shares in Asustek 4.26 per cent lower by 0406 GMT, after they had opened 0.7 per cent higher. The broader market was up 0.15 per cent.

Asustek's investor relations spokesman Nick Wu confirmed that part of the revenue this quarter will be booked one quarter later because of the launch delay. He declined to confirm any other details.

Google introduced the Nexus 7, its first tablet, on Wednesday in the US The device is built by and co-branded with Asustek.

The tablet will be on sale from mid-July for $199, with Google hoping to replicate its smartphone success in a hotly contested market now dominated by Amazon.com Inc's Kindle Fire and Apple Inc's iPad.