Cynthiana is the oldest native North American varietal in commercial cultivation today.

辛西亚纳是北美最古老的土著在今天的商业栽培品种。

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China itself has not approved commercial cultivation of GM rice, although there are numerous field trials in the country.

中国本身尚未准许商业性种植基因改造大米，但境内有许多田野试种。

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So far, there are 305 cultivars and 120 clones of M. rubra in China, and 18 cultivars have been approved as cultivars for commercial cultivation.

全国现有杨梅栽培品种305个，单系120个，其中18个栽培品种通过了省级审定用于商业生产。

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"In the past few years we have seen a massive growth in the commercial cultivation of cannabis in the UK, " Ms Smith told Parliament.

BBC: Inside one of Britain's cannabis factories