【摘 要】
：
为了分析薏苡农艺性状变异特征,探索决定薏苡单株产量的主要农艺性状,为优选薏苡高产品种提供参考,以贵薏1号、兴仁小白壳和云南师宗小黑壳为研究对象,在成熟期对薏苡株高、分枝数、各节位分枝粒数等20个主要农艺性状进行田间考察,采用相关分析和通径分析等方法分析薏苡主要农艺性状之间的关系,以明确薏苡单株产量形成的主要决定因子.结果表明:薏苡主要农艺性状变异丰富,变异系数为2.20％～39.88％,其中以单株总实粒数的变异系数最大;相关分析发现,薏苡的单株总实粒数、结实率与单株产量呈显著正相关,始结实节位与单株产量呈
【机 构】
：
贵州大学农学院,贵州 贵阳 550025
论文部分内容阅读
为了分析薏苡农艺性状变异特征,探索决定薏苡单株产量的主要农艺性状,为优选薏苡高产品种提供参考,以贵薏1号、兴仁小白壳和云南师宗小黑壳为研究对象,在成熟期对薏苡株高、分枝数、各节位分枝粒数等20个主要农艺性状进行田间考察,采用相关分析和通径分析等方法分析薏苡主要农艺性状之间的关系,以明确薏苡单株产量形成的主要决定因子.结果表明:薏苡主要农艺性状变异丰富,变异系数为2.20％～39.88％,其中以单株总实粒数的变异系数最大;相关分析发现,薏苡的单株总实粒数、结实率与单株产量呈显著正相关,始结实节位与单株产量呈显著负相关;通径分析显示,影响薏苡单株产量的关键农艺性状依次为一级分枝数、单株总实粒数、株高、始结实节位和有二级分枝的节数.对分枝性状进行分析,发现不同节位间分枝性状的变异幅度不同,其变异系数为17.01％～73.78％;节位粒数、二级分枝小花数和二级分枝结果数与薏苡单株产量呈极显著或显著正相关;影响薏苡单株产量的关键分枝性状依次为节位粒数、一级分枝顶端结果数、二级分枝顶端小花数及二级分枝结果数.综合分析,薏苡具有丰富的遗传多样性,株型较高、始结实节位低、分枝数多且分枝上结实能力强的薏苡品种产量较高.
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