Comprehensive Evaluation of Drought Tolerance at Seedling Stage for Wheat Recombinant Inbred Lines

DU Xinxin; ZHANG Hong; WU Yunpeng; QIN Sisi; SU Rongcun; GENG Jianfen

doi:10.13961/j.cnki.stbctb.2016.04.049

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Comprehensive Evaluation of Drought Tolerance at Seedling Stage for Wheat Recombinant Inbred Lines

- Comprehensive Evaluation of Drought Tolerance at Seedling Stage for Wheat Recombinant Inbred Lines
- Bulletin of Soiland Water Conservation Vol. 36, Issue 4, Pages: 286-290(2016)
- 作者机构：
  
  德州学院生态与园林建筑学院,山东,德州,253023
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2016.04.049
  CLC：
- Published：2016
- 稿件说明：
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DU Xinxin, ZHANG Hong, WU Yunpeng, et al. Comprehensive Evaluation of Drought Tolerance at Seedling Stage for Wheat Recombinant Inbred Lines[J]. Bulletin of Soiland Water Conservation, 2016, 36(4): 286-290.
DOI：

DU Xinxin, ZHANG Hong, WU Yunpeng, et al. Comprehensive Evaluation of Drought Tolerance at Seedling Stage for Wheat Recombinant Inbred Lines[J]. Bulletin of Soiland Water Conservation, 2016, 36(4): 286-290. DOI： 10.13961/j.cnki.stbctb.2016.04.049.

摘要

[目的

]

探讨干旱对小麦萌发期幼苗生长的影响，筛选抗旱的优良小麦种质材料，为小麦抗旱新品种的选育提供依据。[方法

]

以洛旱2号与潍麦8号杂交产生的重组自交系（RIL）群体（F

）为材料，基于小麦萌发期幼苗在不同水分条件下的多个农艺性状指标数据，通过主成分分析和

均值聚类的方法，对重组自交系的291个株系及其亲本进行了苗期抗旱性综合评价，并对各株系的苗期抗旱性度量值和其产量的相关性进行了分析。[结果

]

（1）用10%的PEG-6000处理萌动的种子，可促进胚芽鞘长和根数的增加，而对其它农艺性状有明显的抑制作用。（2）从该重组自交系的291个株系中筛选出了44个抗旱优良株系，为小麦抗旱育种提供了宝贵的种质材料。（3）小麦各株系的苗期抗旱性和其产量之间呈显著的正相关。[结论

]

根系性状对干旱胁迫的反应最为敏感，干旱胁迫下能否形成相对强大的根系系统是衡量幼苗抗旱性的重要条件。

Abstract

[Objective] The effects of drought on wheat seedling growth and selecting excellent wheat germplasm materials with drought resistance were studied to provide a basis for the breeding of new drought-resistive varieties. [Methods] Seedlings derived from the cross between Weimai 8 and Luohan 2 were used as experimental materials

which had 291 lines from a recombination inbred line(RIL) population(F9). The seedlings were treated with different water conditions during germination stage

and multiple agronomic trait indices were measured. A comprehensive evaluation of drought tolerance of the RIL population and its parents were conducted by methods of principal component analysis and K-means clustering. And also

correlation analysis between drought tolerance indices and yields of all the lines was conducted. [Results] Those germinated wheat seeds treated with 10% PEG-6000 were observed to be promoted for coleoptile length and root number

while obvious inhibitory effects were observed for other agronomic traits. 44 excellent lines with drought tolerance were selected from the RIL populations

which provided valuable germplasm materials for drought resistive wheat breeding. [Conclusion] The responses of root to drought stress performed the mostly sensitive

because a strong root system under drought tolerance is one of the important conditions that decide the drought tolerance of seedling. Drought tolerance of wheat seedlings and its yield were remarkably positively correlated.

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references

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