高级检索
    周国雁, 伍少云, 隆文杰, 雷涌涛. 云南省不同小麦资源种子萌发期抗旱性相关性状差异及与抗旱指数、抗旱系数的相关性[J]. 华南农业大学学报, 2015, 36(2): 13-18. DOI: 10.7671/j.issn.1001-411X.2015.02.003
    引用本文: 周国雁, 伍少云, 隆文杰, 雷涌涛. 云南省不同小麦资源种子萌发期抗旱性相关性状差异及与抗旱指数、抗旱系数的相关性[J]. 华南农业大学学报, 2015, 36(2): 13-18. DOI: 10.7671/j.issn.1001-411X.2015.02.003
    shu
    ZHOU Guoyan, WU Shaoyun, LONG Wenjie, LEI Yongtao. Drought resistant characters during germination of different wheat germplasm in Yunnan Province and their correlations with the index and coefficient of drought resistance[J]. Journal of South China Agricultural University, 2015, 36(2): 13-18. DOI: 10.7671/j.issn.1001-411X.2015.02.003
    Citation: ZHOU Guoyan, WU Shaoyun, LONG Wenjie, LEI Yongtao. Drought resistant characters during germination of different wheat germplasm in Yunnan Province and their correlations with the index and coefficient of drought resistance[J]. Journal of South China Agricultural University, 2015, 36(2): 13-18. DOI: 10.7671/j.issn.1001-411X.2015.02.003
    shu

    云南省不同小麦资源种子萌发期抗旱性相关性状差异及与抗旱指数、抗旱系数的相关性

    Drought resistant characters during germination of different wheat germplasm in Yunnan Province and their correlations with the index and coefficient of drought resistance

      摘要
    • 摘要:
      目的 通过比较模拟干旱胁迫条件下全生育期抗旱性不同的云南小麦资源种子萌发期抗旱性相关性状的差异，寻找早期阶段对全生育期抗旱性强弱有指标作用的种子萌发期性状.
      方法 采用PEG-6000高渗溶液渗透胁迫法，观察了2种5亚种70份材料的发芽势、发芽率、胚根数、最大胚根长、胚芽鞘长和胚芽长等6个种子萌发期抗旱性的相关性状，分析了观察平均值及相对值与抗旱指数、抗旱系数的相关性.
      结果和结论 在5个亚种的全生育期抗旱性强-极强品种与极弱的对照品种云选11-12、与中等或弱-极弱的品种比较中，没有一个观察性状的平均值及其相对值有一致的显著差异，也没有一个观察性状的平均值及其相对值与所有5个亚种抗旱性强-极强品种的抗旱指数、抗旱系数有一致的显著或极显著的相关性.结果表明仅用同一个抗旱性相关性状将所有亚种抗旱性强-极强的品种都区分出来是不现实的，需要利用种子萌发期的一些相关性状(如相对胚根数、相对胚芽鞘长、相对胚芽长、相对最大胚根长和根芽长比等)并结合其与抗旱指数、抗旱系数的相关性，才能筛选出不同亚种的抗旱性强-极强的育种材料.

       

      Abstract:
      Objective To explore indicative characters for predicting drought resistance in the whole growing period of different wheat germplasm in Yunnan Province at seed germination stage by simulating drought stress.
      Method Six germination characters associated with drought resistance, including germination energy, germination rate, number of radicels, length of maximal radicels, length of coleoptiles and length of embryos among 70 accession wheat materials of Yunnan with 5 subspecies in 2 species, were studied under water and hypertonic solution of polyethylene glycol (PEG-6000) described by GB/T21127-2007 treatment conditions. Moreover, the correlations between observed average values and relative values of six germination characters and indexes and coefficients of drought resistance were analyzed.
      Result and conclusion Among 5 subspecies, most of the observed average values and relative values of six germination characters did not show consistently significance in the whole growing period between varieties of drought resistance and highly drought resistance and the control of Yunxuan 11-12 of highly weak resistance, between varieties of drought resistance and highly drought resistance and varieties of middle resistance or between drought resistance and highly drought resistance and weak and highly weak resistance. Accordingly, most of the observed average values and relative values did not indicate conformable significance to their relative indexes and coefficients of drought resistance in the whole growing period. These results show that it is impossible to filter out the varieties of drought resistance and highly drought resistance in the whole growing period among all subspecies just depending on a single associated germination character of drought resistance. Thus, the breeding materials of different subspecies with drought resistance and highly drought resistance should be screened out by a combination of some germination characters (relative number of radicels, relative length of maximal radicels, relative length of coleoptiles and relative length of embryos, and ratios of length of radicels- embryos) associated with drought resistance and indexes and coefficients of drought resistance.

       

      • HTML全文
      • 参考文献(17)
      • 相关文章
      • 施引文献
    • 资源附件(0)

    /

    返回文章
    返回