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There were very small effect of seed source and no definite geographic pattern in tracheid length.

管胞长度的种源区和产地效应很小，无一定的地理变异趋势。

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The selection principle is selecting stand from fine seed source and from them selecting fine individuality.

论述了优树选择应遵循优良种源区选择优良林分，优良林分中选择优良单株的系统选择原则。

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The new seed is also reported to be a rich source of protein.

BBC: Addictive-free poppy seed developed

In the specific case of maize, to ensure that seed stocks achieve 99.9% purity, a separation distance of 200 metres is required from any source of "contaminating" maize pollen.

BBC: GM trial 'no threat to organic centre'

OpenFeint seed investor Peter Relan is fed up with his former creation's lack of existence -- the open source software once powered the social integration behind many mobile games.

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