[1]李子玉,李伟,陈光毅,等.不同赤霉素处理对水稻不育系开花动态及异交态势的影响[J].江苏农业学报,2025,(04):625-634.[doi:doi:10.3969/j.issn.1000-4440.2025.04.001]
　LI Ziyu,LI Wei,CHEN Guangyi,et al.Effects of different gibberellin treatments on flowering dynamics and outcrossing characteristics of rice sterile lines[J].,2025,(04):625-634.[doi:doi:10.3969/j.issn.1000-4440.2025.04.001]
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不同赤霉素处理对水稻不育系开花动态及异交态势的影响()
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江苏农业学报[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2025年04期
页码:
625-634
栏目:
遗传育种·生理生化
出版日期:
2025-04-30

文章信息/Info

Title:
Effects of different gibberellin treatments on flowering dynamics and outcrossing characteristics of rice sterile lines
作者:
李子玉1; 2; 李伟1; 陈光毅1; 李天2; 朱从桦1; 邓世健1; 余俊奇1; 张瑶2; 李旭毅1; 欧阳裕元1; 2
(1.四川省农业科学院作物研究所,四川成都610066；2.四川农业大学农学院,四川成都611130)
Author(s):
LI Ziyu1; 2; LI Wei1; CHEN Guangyi1; LI Tian2; ZHU Conghua1; DENG Shijian1; YU Junqi1; ZHANG Yao2; LI Xuyi1; OUYANG Yuyuan1; 2
(1.Crop Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China;2.College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China)
关键词:
杂交水稻; 机械化制种; 赤霉素; 不育系; 花期; 异交结实率
Keywords:
hybrid rice; mechanized seed production; gibberellin; sterile lines; flowering period; outcrossing seed setting rate
分类号:
S334.2+4
DOI:
doi:10.3969/j.issn.1000-4440.2025.04.001
文献标志码:
A
摘要:
为明确不同赤霉素处理对水稻不育系开花动态和异交态势的影响,以早-6A×早5-1、旌康1A×LR72和川种3A×中种R1607组合为材料,以不施赤霉素为对照(CK)，设置不育系幼穗分化第Ⅶ期喷施赤霉素22.5 g/hm2处理(S1)、不育系幼穗分化第Ⅷ期喷施赤霉素15.0 g/hm2及抽穗10%当日7:00和19:00分别喷施赤霉素90.0 g/hm2和75.0 g/hm2处理(S2)、不育系抽穗20%当日及其后2 d分别喷施赤霉素75.0 g/hm2、45.0 g/hm2及45.0 g/hm2处理(S3),分析不同处理对不育系开花动态、植株形态、穗层结构、柱头外露率和产量构成的影响。结果表明,3个组合不施用赤霉素(CK)亲本花期偏移5～6 d,3个组合S1处理花遇指数介于73.33%～85.71%,S2处理和S3处理花遇指数介于43.75%～66.67%。S2处理和S3处理3个不育系的株高显著高于S1处理和CK,S2处理和S3处理3个不育系的倒1节间长、倒2节间长、倒3节间长总体均显著高于S1处理和CK。3个不育系包颈穗率由低到高依次为S3处理、S2处理、S1处理、CK。S3处理3个不育系的单边柱头外露率、双边柱头外露率及柱头总外露率总体上显著高于其他3个处理,其中,S3处理双边柱头外露率比CK增加96.20%～140.03%。处理间3个不育系的有效穗数、每穗粒数、千粒重无显著差异,3个组合S3处理和S2处理的结实率和理论产量显著高于S1处理和CK。综合来看,亲本花期偏移导致花遇指数降低是杂交制种异交结实率下降的主要因素,S3处理可有效提高花遇指数和改良不育系异交态势。
Abstract:
In order to clarify the effects of different gibberellin treatments on flowering dynamics and outcrossing situation of rice sterile lines, the combinations of Zao-6A × Zao5-1, Jingkang1A × LR72 and Chuanzhong3A × Zhongzhong R1607 were used as materials. The treatments included no gibberellin control (CK), spraying 22.5 g/hm2 gibberellin at the Ⅶ stage of young panicle differentiation of sterile lines (S1), spraying 15.0 g/hm2 gibberellin at the Ⅷ stage of young panicle differentiation of sterile lines and spraying 90.0 g/hm2 and 75.0 g/hm2 gibberellin at 7:00 and 19:00 on the day of 10% heading (S2), spraying 75.0 g/hm2, 45.0 g/hm2 and 45.0 g/hm2 gibberellin on the day of 20% heading and the next two days (S3). The effects of different treatments on flowering dynamics, plant morphology, panicle structure, stigma exsertion rate and yield composition of sterile lines were analyzed. The results showed that the flowering period of the parents of the three combinations in CK was shifted by 5-6 d. The flowering index of the three combinations under S1 treatment was 73.33%-85.71%, and the flowering index under S2 treatment and S3 treatment was 43.75%-66.67%. The plant height of the three sterile lines of S2 treatment and S3 treatment was significantly higher than that of S1 treatment and CK, and the lengths of the inverted 1st internode, inverted 2nd internode and inverted 3rd internode of the three sterile lines of S2 treatment and S3 treatment were significantly longer than those of S1 treatment and CK. The panicle rate of the three sterile lines from low to high was S3 treatment, S2 treatment, S1 treatment and CK. The unilateral stigma exsertion rate, bilateral stigma exsertion rate and total stigma exsertion rate of the three sterile lines under S3 treatment were significantly higher than those under the other three treatments. Among them, the bilateral stigma exsertion rate of S3 treatment increased by 96.20%-140.03% compared with CK. There were no significant differences in the number of effective panicles, the number of grains per panicle and 1 000-grain weight among the three sterile lines. The seed setting rate and theoretical yield of the three combinations under S3 treatment and S2 treatment were significantly higher than those of S1 treatment and CK. On the whole, the decrease of flowering index caused by flowering period deviation of parents is the main factor for the decrease of outcrossing rate of hybrid seed production. S3 treatment can effectively improve the flowering index and improve the outcrossing situation of sterile lines.

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备注/Memo

备注/Memo:
收稿日期：2024-07-30基金项目：四川省育种攻关项目(2021YFYZ0005); 国家重点研发计划项目(2023YFD1500401-4); 国家现代农业产业技术体系四川水稻创新团队项目(SCCXTD-2024-1);四川省十四五生物育种重大科技专项（2022ZDZX0012）作者简介：李子玉(1998-),男,四川成都人,硕士研究生,主要从事水稻高产优质栽培研究。(E-mail)lmour626@163.com通讯作者：欧阳裕元,(E-mail)ouyang8805@126.com；李旭毅,(E-mail)xuyili@163.com
更新日期/Last Update: 2025-05-26