* Shanghai stocks lower, blue-chip CSI300 index down
* Gains in Shanghai stocks led by Zhongnongfa Seed Industry Group MeiDu Energy Corp leads losses
* China's A-shares are at 36.29 pct premium over H-shares
SHANGHAI, Feb 7 (Reuters) - China stocks reversed earlier gains encouraged by a rebound on Wall Street and dropped to one-month lows on Wednesday, as investors sold off real estate and consumer firms that had handsome gains in recent months.
** An index tracking major developers plummeted 7.6 percent, posting its worst percentage fall since July 2015. The index had been on a five-month winning-streak until February.
** At the close, the Shanghai Composite index was down 61.07 points or 1.81 percent at 3,309.58.
** The blue-chip CSI300 index was down 2.38 percent, with its financial sector sub-index lower by 3.38 percent, the consumer staples sector down 4.2 percent and healthcare sub-index down 1.34 percent.
** The smaller Shenzhen index ended down 0.68 percent and the start-up board ChiNext Composite index was higher by 1.14 percent.
** Around the region, MSCI's Asia ex-Japan stock index was weaker by 0.1 percent while Japan's Nikkei index closed up 0.16 percent.
** At 07:04 GMT, the yuan was quoted at 6.2584 per U.S. dollar, 0.36 percent firmer than the previous close of 6.281.
** The largest percentage gainers in the main Shanghai Composite index were Zhongnongfa Seed Industry Group Co Ltd up 10.18 percent, followed by Kunwu Jiuding Investment Holdings Co Ltd gaining 10.03 percent and Shanghai Diesel Engine Co Ltd up by 9.98 percent.
** The largest percentage losses in the Shanghai index were MeiDu Energy Corp down 10.05 percent, followed by Zhejiang XinAn Chemical Industrial Group Co Ltd losing 10.03 percent and Guizhou Chitianhua Co Ltd down by 10.02 percent.
** So far this year, the Shanghai stock index is up 1.92 percent, the CSI300 is up 0.5 percent this year, while China's H-share index listed in Hong Kong is up 8.3 percent. Shanghai stocks have declined 3.17 percent this month.
** About 26.09 billion shares were traded on the Shanghai exchange, roughly 122.6 percent of the market's 30-day moving average of 21.29 billion shares a day. The volume in the previous trading session was 28.06 billion.
** As of 07:05 GMT, China's A-shares were trading at a premium of 36.28 percent over the Hong Kong-listed H-shares.
** The Shanghai stock index is below its 50-day moving average and above its 200-day moving average.
** The price-to-earnings ratio of the Shanghai index was 15.63 as of the last full trading day while the dividend yield was 1.9 percent.
** So far this week, the market capitalisation of the Shanghai stock index has fallen by -2.22 percent to 29.98 trillion yuan. (Reporting by Shanghai Newsroom; Editing by Jacqueline Wong)