【摘要】 采用520份种质资源进行两年田间诱发鉴定查明,芝麻的耐涝性与基因型和根系活力有密切关系.野生种高度耐涝;栽培种中的部分改良品种(系)及来源于高湿地区和低洼易涝地带的部分农家品种也表现高度耐涝,反映出不同的遗传背景.从现阶段育种目标需要出发,提供豫芝1号、河南1号、宜阳白等16个高度耐涝的优良品种和种质资源.研究结果还表明,体现根系活力的伤流量和根群量是评价芝麻耐涝性的重要生物指标.更多还原

【Abstract】 Close relationship between the resistant ability of waterlogging and the genotypes and the vigor of root system were found in an induced field trial for 2 years. The wild species were strongly resistant to waterlogging. Some improved cultivars (strains) and some native varieties from low-lying land and places with high humidity also expressed high waterlogging resistance. This reflected the hereditary background of these germplasms. 16 varieties such as Yuzhi No. 1, Henan No. 1, Yiyang Bai etc. can meet the demand of present breeding objectives. The amount of bleeding sap and the dimension of root system, used as the expression of root system vigor, arc important biological indices in evaluating the resistant ability of waterlogging in sesame, and possess significance in theoretical and practical research.更多还原