| 油菜和甘芥杂交后代薹花期耐旱性鉴定 |
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| 引用本文： | 原小燕,符明联,张云云,刘珏,铁朝良,李燕,王绍能.油菜和甘芥杂交后代薹花期耐旱性鉴定[J].中国油料作物学报,2018,40(1):84. |
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| 作者姓名： | 原小燕 符明联 张云云 刘珏 铁朝良 李燕 王绍能 |
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| 作者单位： | 1. 云南省农业科学院经济作物研究所，云南 昆明，650205；2.德宏州农业技术推广中心，云南 德宏，678400；3. 寻甸县农业局农业技术推广站，云南 寻甸，655200；4. 泸西县农业技术推广中心，云南 泸西，652400 |
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| 基金项目： | 云南省自然科学基金(2014FB161)；云南省创新人才培养对象项目(2017HB086)；云南省创新团队（2017HC021)；云南区油菜优异种质资源精准鉴定与发掘利用（2016YFD0100202-12）；云南省现代农业油菜产业技术体系建设（2017KGTX005） |
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| 摘 要： | 为筛选远缘杂交后代中的抗旱材料，连续4年于生殖生长关键时期（薹花期），设正常灌水及干旱胁迫处理，考察包括甘蓝型油菜、芥菜型油菜及甘芥杂交后代共计43份材料成熟期产量及12个产量相关性状，采用经典抗旱指数法结合连锁聚类分析，筛选优异抗旱资源，并分析干旱对产量相关因子，尤其是产量组成因子的影响，筛选关键的抗旱性鉴定指标。结果表明，3个产量构成因子中，角果数对薹花期干旱最敏感，千粒重及每角粒数变化不大，干旱使得一次分枝数、侧枝角果数显著减少，导致总角果数下降，成为影响产量下降的主要原因，相关分析表明，干旱条件下相对总角果数、相对侧枝角果数、相对株高与抗旱指数呈显著正相关，相对侧枝角果数、相对总角果数可作为油菜薹花期抗旱性筛选指标，相对一次分枝数、相对株高也可作为初筛指标；同一材料在不同程度干旱胁迫下，其抗旱性表现有差别，4年共筛选出17份抗旱材料，抗旱性比较稳定的有3份，其中1份甘芥杂交后代材料抗旱性稳定且干旱条件下产量较高。
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| 关 键 词： | 甘蓝型油菜 芥菜型油菜 甘芥杂交后代 DH株系 抗旱鉴定 抗旱指数 |
Drought tolerance of rapeseed and hybrids of B. napus and B. juncea at budding and flowering periods |
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| YUAN Xiao-yan,FU Ming-lian,ZHANG Yun-yun,LIU Jue,TIE Chao-liang,LI Yan WANG Shao-neng.Drought tolerance of rapeseed and hybrids of B. napus and B. juncea at budding and flowering periods[J].Chinese Journal of Oil Crop Sciences,2018,40(1):84. |
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| Authors: | YUAN Xiao-yan FU Ming-lian ZHANG Yun-yun LIU Jue TIE Chao-liang LI Yan WANG Shao-neng |
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| Institution: | 1. Industrial Crop Research Institute, Yunnan Academy of Agricultural Sciences, Kunming 650205, China; 2. Delong Agricultural Technology Extension Station, Delong 678400, China; 3. Xundian Agricultural Technology Extension Statio, Xundian 655200, China; 4. Luxi Centre of Agricultural Technique , Luxi 652400, China |
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| Abstract: | To explore the drought tolerance of rapeseed and hybrids of Brassica napus and Brassica juncea, experiments had been carried out under drought stress at budding and flowering stages for 4 years. Tested materials included 43 lines of B. napus, B. juncea and interspecific hybrids. Drought resistance index method and cluster analysis were used. Result showed that, among the 3 yield component factors, the total pod number per plant was the most sensitive to drought. It decreased the yield by the reducing the numbers of first branch and pod number. The relative total pod number, relative collateral pod number, relative branch height and drought resistance index showed significant positive correlation under drought. Thus the relative collateral pod number and relative total pod number could be used as screening indexes of drought resistance, and relative branch number and relative plant height could be used as initial indexes. 17 drought resistant materials were found. Among them, only 2 were consistent between years, and the hybrid line 12XS256-6-1 was consistent both in drought tolerance and high yield. |
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| Keywords: | Brassica napus Brassica juncea Interspecific hybrid of B napus and B juncea Doubled Haploid Lines Drought tolerance identification Drought resistance index |
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