天津农学院学报 ›› 2024, Vol. 31 ›› Issue (3): 1-4.doi: 10.19640/j.cnki.jtau.2024.03.001

• 研究与简报 •    下一篇

播期和种植密度对3个甜高粱新不育系生产的影响

张楠, 伍文文, 罗峰, 高建明, 孙守钧, 裴忠有通信作者   

  1. 天津农学院 农学与资源环境学院,作物遗传育种重点实验室,天津 300392
  • 收稿日期:2022-11-13 出版日期:2024-06-30 发布日期:2024-07-15
  • 通讯作者: 裴忠有(1967—),男,研究员,博士,研究方向:作物分子育种。E-mail:zhongyoupei@tjau.edu.cn。
  • 作者简介:张楠(1996—),女,硕士在读,研究方向:作物遗传育种。E-mail:1970282918@qq.com。
  • 基金资助:
    “十三五”国家重点研发计划“七大农作物育种”专项(2017YFD0100500); 国家公益性行业(农业)科研专项项目(201502134)

Effects of sowing date and density on yield of new sweet sorghum sterile lines

Zhang Nan, Wu Wenwen, Luo Feng, Gao Jianming, Sun Shoujun, Pei ZhongyouCorresponding Author   

  1. Tianjin Agricultural University, College of Agronomy and Resources Environment, Key Laboratory of Crop Genetics and Breeding, Tianjin 300392, China
  • Received:2022-11-13 Online:2024-06-30 Published:2024-07-15

摘要: 为确定新选育甜高粱不育系适宜的播种时间和播种密度,以甜高粱不育系TX623A和 7050A为对照,甜高粱新不育系29A、34A和44A为试验材料,采用裂区区组试验,设置3个播期、3个种植密度,分析播期和种植密度对甜高粱新不育系的产量和产量相关性状的影响。结果表明:不同播期和种植密度对千粒重影响差异显著,29A、34A适宜播期为5月14日、适宜种植密度为8.0万株/hm2,44A适宜播期为4月30日、适宜种植密度为8.0万株/hm2;不同播期和种植密度对穗粒数影响差异显著,在4月30日播种、种植密度为7.0万株/hm2时穗粒数值最大,其中34A、44A穗粒数大于对照种TX623A和7050A;不同播期和种植密度对经济产量和生物产量的影响差异显著,不育系29A、34A、44A的产量随播期推迟、种植密度增加呈逐渐降低趋势,且经济产量与产量性状呈极显著相关关系。因此,综合以上结果,最终确定不育系29A、34A、44A播种时间为4月30日、种植密度为7.5万株/hm2时,不育系产量最高。该试验为甜高粱新不育系的生产栽培提供了技术支持。

关键词: 甜高粱, 产量, 播期, 种植密度, 不育系

Abstract: In order to determine the suitable sowing time and planting density of the newly bred sweet sorghum sterile lines, this experiment taking the sweet sorghum sterile lines TX623A and 7050A as the control and the newly bred sorghum sterile lines 29A, 34A and 44A as the experimental materials, set three sowing dates and three planting densities by split plot experiment, and analyzed their effects on the yield and yield-related characters of the newly bred sweet sorghum sterile lines. The results showed that different sowing dates and planting densities had significant differences on 1 000-grain weight. The suitable sowing date for 29A and 34A was May 14th, with a density of 80 000 plant/hm2, and the suitable sowing date for 44A was April 30th, with a density of 80 000 plant/hm2. Different sowing dates and planting densities had significant differences on the number of grains per panicle. When sowed on April 30th ,with the density of 70 000 plant/hm2, the number of grains per panicle was the largest, and the number of grains per panicle in 34A and 44A was larger than that of TX623A and 7050A as control varieties. The effects of different sowing dates and planting densities on economic yield and biological yield were significantly different. The yield of 29A, 34A and 44A showed a decreasing trend with the delay of sowing date and the increase of density, and the economic yield showed a very significant correlation with yield traits. Based on the above results, when 29A, 34A and 44A were sown on April 30th,with the density of 75 000 plant/hm2, the yield of sterile lines was the highest. This experiment provides cultural technical support for the production of newly bred sweet sorghum sterile lines.

Key words: sweet sorghum, yield, sowing date, density, male sterile line

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