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| 苗期短光照对三系杂交大豆及亲本育性的影响 |
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白志元1,2,3,杨玉花1,2,张瑞军1,2*
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| (1.山西农业大学 农业基因资源研究中心, 太原 030031;2.农业农村部黄土高原作物基因资源与种质创制重点实验室, 太原 030031;3.南京农业大学 农学院/国家大豆改良中心, 南京 210095) |
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| 摘要: |
| 为选育大豆强恢复系材料和探索培育育性稳定大豆杂交种的方法，采用14个代表性材料包括6个三系大豆杂交组合、2个不育系、2个保持系和4个恢复系，设置苗期短光照(SL)和正常光照(NL)处理，分析在2个光照处理下杂交大豆及亲本育性相关指标。结果表明，不育系、保持系和恢复系的育性都高度稳定，不受苗期短光照的影响。不同杂交组合的育性出现显著差异，以‘SXTH 3’、‘SXTH 5’和‘SXTH 21’恢复系配制的4个杂交组合育性受苗期SL处理的影响较大，SL处理后植株几乎不结荚，表现出不育，杂交组合育性不稳定，‘SXTH 3’、‘SXTH 5’和‘SXTH 21’为弱恢复系；以‘SXTH 40’恢复系配制的2个杂交组合育性受苗期SL处理的影响较小，SL处理后植株仍能正常结实，表现可育，杂交组合育性稳定，‘SXTH 40’为强恢复系。花粉可育率与单株荚数、单株粒数均呈极显著正相关。苗期短光照处理与花粉可育率检测相结合的方法，有利于选育出强恢复系及育性稳定的大豆杂交种。 |
| 关键词: 杂交大豆 短光照 育性 花粉可育率 农艺性状 |
| DOI：10.11841/j.issn.1007-4333.2021.09.02 |
| 投稿时间：2020-09-28 |
| 基金项目:国家重点研发计划(2016YFD0101500,2016YFD0101504)；山西省面上青年基金(201901D211565,201901D211563)；山西省农业科学院优秀青年基金(YCX2020YQ58) |
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| Effects of short light at seedling stage on fertility of three-line hybrid soybean and its parents |
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BAI Zhiyuan1,2,3,YANG Yuhua1,2,ZHANG Ruijun1,2*
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| (1.Center for Agricultural Genetic Resources Research, Shanxi Agricultural University, Taiyuan 030031, China;2.Key Laboratory of Crop Gene Resources and Germplasm Enhancement on Loess Plateau of Ministry ofAgriculture and Rural Affairs, Taiyuan 030031, China;3.College of Agriculture/National Center for Soybean Improvement, Nanjing Agricultural University, Nanjing 210095, China) |
| Abstract: |
| In order to explore the method of breeding soybean hybrids with strong restorer and fertility stability, fourteen representative materials including six three-line soybean hybrid combinations(two male sterile lines, two maintainer lines and four restorer lines)were used to analyze the fertility related indexes of hybrid soybean and its parents under short light(SL)and normal light(NL)at seedling stage. The results showed that the fertility of male sterile lines, maintainer lines and restorer lines was highly stable, and not affected by SL treatment at seedling stage. The fertility of different hybrids showed significant differences. The fertility of four hybrid combinations with ‘SXTH 3', ‘SXTH 5' and ‘SXTH 21' restorer lines was greatly affected by SL treatment at seedling stage. After SL treatment, the plants almost did not pod and showed sterility. The fertility of hybrid combinations was unstable, and ‘SXTH 3', ‘SXTH 5' and ‘SXTH 21' were weak restorer lines. The fertility of two hybrid combinations prepared with ‘SXTH 40' restorer line was less affected by SL treatment at seedling stage. After SL treatment, the plants could still set pod normally, which was fertile. The fertility of hybrid combinations was stable, and ‘SXTH 40' was a strong restorer line. The pollen fertility rate was significantly positively correlated with pod number per plant and seed number per plant. In conclusion, the combination of short light treatment at seedling stage and detection of pollen fertility rate is conducive to breeding strong restorer lines and stable fertility soybean hybrid combinations. |
| Key words: hybrid soybean short light fertility pollen fertility rate agronomic trait |
