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通过水培法对协青早B//协青早B/东乡野生稻BC1F9群体221个株系低磷耐性进行了鉴定,测定了株高、叶龄、黄叶数、地上部干物质量等形态指标及丙二醛(MDA)、可溶性糖和地上部磷含量等生理指标,计算了磷效率,并对各指标间相关性进行了分析.结果表明:221个株系的7个指标均显示出差异性,耐性株系在低磷胁迫下表现为相对叶龄、相对株高、相对地上部干物质量和相对可溶性糖含量较高,相对黄叶数和相对MDA含量较低,相对地上部磷含量差异不明显;磷效率与磷利用效率和磷吸收效率均呈正相关,其中磷利用效率与磷效率达到极显著水平(P<0.01),表明东乡野生稻回交重组自交系中耐性株系低磷耐性原因主要是具有高磷利用效率,即其单位吸磷量干物质合成力较高.
The low phosphorus tolerance of 221 lines of Xieqingzao B // Xieqingzao B / Dongxiang wild rice BC1F9 was identified by hydroponics, and the plant height, leaf age, number of yellow leaves and dry matter of shoots were determined (MDA), soluble sugar and aboveground phosphorus content were calculated, and the phosphorus efficiency was calculated, and the correlation between each index was analyzed.The results showed that all the 221 indicators showed poor performance The heterosexual and resistant lines showed relative leaf age and relative plant height under low-P stress, with higher relative dry matter and soluble sugar content, lower relative yellow leaf number and relative MDA content, and relatively higher upper phosphorus content P use efficiency and P efficiency were positively correlated, P use efficiency and P efficiency reached a significant level (P <0.01), indicating that in Dongxiang wild rice backcross inbred lines inbred lines of low-phosphorus The main reason of patience is the utilization efficiency of high phosphorus, that is, the unit of phosphorus uptake is high in dry matter synthesis.