关键词: 谷子, 亚硒酸钠, 硒敏感性, 农艺性状, 基因型

Abstract: Na₂SeO₃ was sprayed on the leaves of different genotypes of foxtail millet materials to explore the difference of selenium sensitivity of foxtail millet germplasm resources. Taking 31 cultivars and landraces as materials, by spraying 110 g·hm^-2 Na2SeO3 at heading stage with water  as control, this paper compared agrological properties and selenium content changes of different varieties after selenium treatment. The results showed that selenium application could significantly (P<0.05) increase the panicle diameter, spike weight and spike grain weight of foxtail millet, and extremely significantly (P<0.01) decrease the plant height and stem diameter. The results of cluster analysis showed that the 31 germplasm resources of millet could be divided into 4 groups, among which the first group was selenium-sensitive material with Sanbianlian, the second group was selenium-resistant material with Changsui 7, the third group included Wawuli, 95 jian 5, Xia 2, and others were the fouth group. The results of principal component analysis showed that the cumulative contribution rate of the first four principal components was 76.11%, and the main load factors were spike weight, spike grain weight, panicle length, selenium content, spike number and thousand grain weight. Those results provided a theoretical basis for the screening of selenium-rich foxtail millet materials and a reference for the breeding of selenium-rich foxtail millet.

Key words: foxtail millet, Na2SeO3, selenium sensitivity, agronomic characters, genotypes