不同血缘玉米自交系的抗旱性鉴定  

Drought Resistance Identification in Different Consanguinity of Maize Inbred Lines

作　　者：潘周云[1] 陈瑾[1] 杨世佳[1] 潘中涛[1] 赵艳花[1] 蔡甫格[1] 张鹏[1] 

机构地区：[1]贵州省安顺市农业科学研究所,贵州安顺561000

出　　处：《贵州农业科学》2013年第10期14-18,共5页Guizhou Agricultural Sciences

摘　　要：为了探明不同血缘玉米自交系的抗(耐)旱特性,采用盆栽试验研究干旱胁迫对6个自育玉米自交系产量构成因子、主要农艺性状、丙二醛含量和游离脯氨酸含量的影响。结果表明:1)在干旱胁迫下,6个玉米自交系农艺性状间的差异达显著或极显著水平,干旱胁迫对玉米自交系各性状的影响达极显著水平。2)干旱胁迫可导致各自交系主要农艺性状的抗旱系数下降,且以拔节期+抽雄期干旱胁迫对玉米自交系产量构成因子的影响最大,抽雄期次之,拔节期最小。3)干旱胁迫使玉米自交系的丙二醛含量和游离脯氨酸含量大量积累。4)6个自交系中以苏65和D902的综合抗旱性最好,抗旱能力最稳定,其综合抗旱系数分别为0.84和0.82,变异系数分别为11.28%和9.32%;AS-丹混的综合抗性最差,其综合抗旱系数和变异系数分别为0.73和20.17%。因此,在贵州进行玉米品种选育时,以苏65及D902自交系为亲本较易成功组配抗旱性较强的玉米新品种。In order to explore the drought resistance characteristics of different consanguinity in maize inbred lines, effect of drought stress on yield component, main agronomic traits, malondialdehyde content, and free proline content in 6 maize inbred lines was conducted by pot experiment. The results showed that： Firstly, the difference of agronomic traits in the 6 lines reached significant or highly significant level, and highly difference in each property under drought stress. Secondly, drought stress could decrease the drought resistance coefficient for main agronomic trait in each inbred line, especially the strong effect of drought stress on yield component happened in iointing-tasseling stage, followed by tasseling stage, but minimal effect happened in jointing stage. Thirdly, malondialdehyde content and free proline content were accumulated massively caused by the drought stress. And finally, among the 6 maize inbred lines, the comprehensive drought resistance of Su 65 and D902 were the highest, with stable resistant ability, and with integrated drought resistance coefficient of 0.84 and 0. 82, and coefficient of variation 11.28~ and 9.32~, respectively. But AS-Dan mix was the worst, with resistance coefficient of 0.73 and coefficient of variation 20. 17~//00, respectively. Therefore, choosing Su 65 and D902 as parental lines could successfully produce stron~ drought resistance varieties in corn breedin~ in Guizhou.

关 键 词：玉米自交系 不同血缘 抗旱性鉴定 贵州 

分 类 号：S513[农业科学—作物学]