| 引用本文: | 周 瑜, 黄 娟, 张亚勤, 吴 毓, 李泽碧.高粱幼穗分化与叶龄指数的关联研究[J].广西植物,2022,42(2):324-332.[点击复制] |
| ZHOU Yu, HUANG Juan, ZHANG Yaqin, WU Yu, LI Zebi.Relationship between panicle differentiation and leaf age index of sorghum[J].Guihaia,2022,42(2):324-332.[点击复制] |
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| 高粱幼穗分化与叶龄指数的关联研究 |
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周 瑜, 黄 娟, 张亚勤, 吴 毓, 李泽碧*
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重庆市农业科学院特色作物研究所, 重庆 永川 402160
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| 摘要: |
| 为明确高粱穗分化进程的简易叶龄诊断方法,该文以杂交种‘晋渝糯3号'和常规种‘国窖红1号'为供试材料,设置3个播期,观察幼穗分化进程及对应的叶龄,分析各分化阶段与叶龄及叶龄指数的对应关系。结果表明:(1)高粱幼穗分化过程可划分为5个时期(营养生长期、生长锥伸长期、枝梗分化期、小穗小花分化期和雌雄蕊分化期),不育的有柄小穗可发育到雌雄蕊分化期。(2)随着播期的推迟,幼穗分化开始日期提前,持续时间缩短,穗分化各时期的叶龄和叶龄指数减小,但品种间存在差异。(3)高粱幼穗分化各时期与对应的叶龄指数存在直线回归关系,其方程通式为Yi=bXi+a(Yi:幼穗分化期,Xi:叶龄指数)。(4)随着播期的推迟,‘晋渝糯3号'的b和|a|值逐渐增大,而‘国窖红1号'的b和|a|值则逐渐减小。综上所述,可根据叶龄指数推测高粱幼穗分化进程,该研究结果为高粱栽培管理指标化提供参考。 |
| 关键词: 高粱, 幼穗分化, 叶龄指数, 播期 |
| DOI：10.11931/guihaia.gxzw202004038 |
| 分类号:Q944 |
| 文章编号:1000-3142(2022)02-0324-09 |
| 基金项目:重庆市自然科学基金(cstc2019jcyj-msxmX0125); 永川区自然科学基金(Ycstc, 2019nb0101; Ycstc,2019nb0102)[Supported by Natural Science Foundation of Chongqing(cstc2019jcyj-msxmX0125); Natural Science Foundation of Yongchuan District(Ycstc, 2019nb0101; Ycstc, 2019nb0102)]。 |
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| Relationship between panicle differentiation and leaf age index of sorghum |
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ZHOU Yu, HUANG Juan, ZHANG Yaqin, WU Yu, LI Zebi*
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Institute of Characteristic Crops Research, Chongqing Academy of Agricultural Sciences, Yongchuan 402160, Chongqing, China
Institute of Characteristic Crops Research, Chongqing Academy of Agricultural Sciences, Yongchuan 402160, Chongqing, China
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| Abstract: |
| In order to determine an easy leaf age(LA)diagnostic method of panicle differentiation stage of sorghum, the panicle differentiation of sorghum and the relationship between differentiation stage and LA and leaf age index(LAI)were investigated. Hybrid cultivar ‘Jinyunuo 3' and conventional cultivar ‘Guojiaohong 1' were used as materials planted in three sowing dates, the panicle differentiation stage and corresponding LA were recorded. The results were as follows:(1)The panicle differentiation could be divided into five stages, i. e. vegetative stage, elongation stage, panicle branch differentiation stage, spikelet and floret differentiation stage, gynoecium and stamen formation stage. The sterile spikelet with stalk could develop to gynoecium and stamen formation stage.(2)With the detention of sowing date, the starting date of panicle differentiation was advanced, and the growth duration shorted, and LA and LAI of each stage of panicle differentiation were decreased, but there were differences among varieties.(3)The relationship between the panicle differentiation stage and LAI conformed to linear regression correlation, with a formula of panicle differentiation stage(Yi)to LAI(Xi)of Yi=bXi+a.(4)With the detention of sowing date, the parameter b and |a| in formula of ‘Jinyunuo 3' were increased, while those of ‘Guojiaohong 1' were decreased. To sum up, it is viable to infer panicle differentiation stage applying LAI, and the results provide theoretical basis for sorghum cultivation index management. |
| Key words: sorghum, panicle differentiation, leaf age index, sowing date |
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