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金沙江干热河谷地区不同含油量麻疯树种子的差异性

DOI: 10.3724/SP.J.1145.2011.00656, PP. 656-661

Keywords: 麻疯树种子,含油量,脂肪酸组成,萌发率,相关性,金沙江干热河谷

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Abstract:

根据金沙江干热河谷地区麻疯树种子的含油量,将麻疯树种子分为组ⅰ(26%~30%)、组ⅱ(30%~34%)、组ⅲ(34%~38%)、组ⅳ(38%~42%).该地区种子体积介于1.544~1.680cm3之间;其中组ⅱ的种子最大(1.680cm3),组ⅳ的种子最小(1.544cm3).组ⅱ种子的百粒重同样为最高(69.367g),组ⅲ的种子最轻(62.313g).出仁率从低到高依次为:组ⅰ(61.752%)<组ⅲ(63.352%)<组ⅱ(64.132%)<组ⅳ(65.192%).百粒种子产油量从组ⅰ到组ⅳ逐渐升高(17.731~25.342g).1h-nmr图谱分析发现,各组种子之间的脂肪酸组成无明显差异,而脂肪酸成分的含量存在显著差异.种子的发芽势、发芽率和发芽指数随含油量的增加而升高,种子的吸胀速率则相反.种子含油量与种子大小的相关性不显著,与种子质量、出仁率、种子产油量、脂肪酸组成、发芽势、发芽率、发芽指数和吸胀速率之间则都有着极显著的相关性.图3表4参30

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