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粮食短缺不仅会导致社会动荡，甚至会引发战争。第一次绿色革命培育了高产矮秆的小麦，实现了产量的快速翻番，袁隆平先生也开始了杂交水稻的应用研究。不同亲本杂交产生的后代要比父母更加优异，但是杂交品种都面临着无法留种的问题，必须每年进行杂交制种，同时需要解决品种选育难、杂交制种难、种子成本高的困境。如何从有性生殖发展为无融合生殖？杂交品种有哪些优势和劣势？怎么实现杂种优势代代相传？“格致论道”是中国科学院全力推出、中国科普博览承办的科学讲坛，致力于精英思想的跨界传播。登录官方网站（self.org.cn）、微信公众号“SELFtalks”获取更多信息。
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