... 2品种审定variety registration 3育成品种bred variety 4引进品种introduced variety ...
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表明，地方品种的抗性功能基因比育成品种异质性高。
The results showed the landrace were more heterogeneous than breeding cultivar in functional genes.
摘要目前我国甜菜育成品种存在变异系谱和遗传基础狭窄的局限性。
Recently the sugar beet varieties bred in china are limited in hereditary basis and genetic variation genealogy .
但育成品种的遗传基础日趋狭窄，将会给农业生产带来潜在风险。
However, the genetic basis of rice varieties is becoming more and more narrow, which may result in potential risk to agricultural production.
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