Screening of Shade-tolerant Summer Maize Varieties in Huang-Huai-Hai Region

doi:10.11924/j.issn.1000-6850.casb2024-0648

Abstract

Abstract:

To select shade-tolerant maize cultivars adapted to low-light conditions in the Huang-Huai-Hai region and thereby improve maize yield in this area, twelve widely cultivated maize cultivars in the region were selected as experimental materials. These cultivars were subjected to a 6-day shading treatment starting at the tasseling stage, and indicators, including silk number, dry matter accumulation, and yield, were measured. The results showed that shading significantly reduced the silk number, silk length, dry matter accumulation, and yield, with the extent of reduction varying among different cultivars. On average, yield decreased by 91.64%, corresponding to a reduction of 11.79 t/hm². Further analysis revealed that ear diameter, ear length, number of kernels per ear, 1000-kernel weight, silk number, and silk length were all significantly positively correlated with yield, indicating that these indicators could serve as effective criteria for evaluating shade tolerance in maize. Based on a comprehensive evaluation of shade tolerance traits and cluster analysis, ‘Jingke 968’, ‘Denghai 605’, and ‘Xundan 20’ were ultimately identified as shade-tolerant cultivars.

Key words: summer maize, variety, shade tolerance, shading treatment, yield, silk, cluster analysis

HAN Wenwen, JIANG Yanhua, ZHANG Xinru, WU Zhihua, SHI Lingxin, TANG Zhiyi, CUI Yanhong, DU Xiong, GAO Zhen. Screening of Shade-tolerant Summer Maize Varieties in Huang-Huai-Hai Region[J]. Chinese Agricultural Science Bulletin, 2025, 41(27): 21-27.

Figures/Tables 9

References 27

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品种编号	品种名称	亲本组合	审定年份
H01	中单2号	Mo17(Ht)×自330	国审2000
H02	掖单13	掖478 ×丹340	国审1998
H03	浚单20	9058×浚92-8	国审2003
H04	农大108	178×黄C	国审1997
H05	隆平206	L239×L7221	国审2007
H06	先玉335	PH6WC × PH4CV	国审2004
H07	农大372	X24621×BA702	国审2015
H08	登海605	登海 351× DH382	国审2011
H09	伟科702	WK798-2×WK858	国审2012
H10	MC812	京B547×京2416	国审2019
H11	郑单958	郑58×昌7-2	国审2000
H12	京科968	京724× 京92	国审2011

品种编号	品种名称	亲本组合	审定年份
H01	中单2号	Mo17(Ht)×自330	国审2000
H02	掖单13	掖478 ×丹340	国审1998
H03	浚单20	9058×浚92-8	国审2003
H04	农大108	178×黄C	国审1997
H05	隆平206	L239×L7221	国审2007
H06	先玉335	PH6WC × PH4CV	国审2004
H07	农大372	X24621×BA702	国审2015
H08	登海605	登海 351× DH382	国审2011
H09	伟科702	WK798-2×WK858	国审2012
H10	MC812	京B547×京2416	国审2019
H11	郑单958	郑58×昌7-2	国审2000
H12	京科968	京724× 京92	国审2011

品种编号	品种名称	对照产量/(t/hm²)	遮光产量/(t/hm²)	产量差/(t/hm²)	减产幅度/%
H01	中单2号	13.31±0.49ab	1.17±0.04abcd	12.13±0.29abc	91.20±0.30abcd
H02	掖单13	11.46±0.73c	1.31±0.43abc	10.14±0.49d	88.54±2.13bcde
H03	浚单20	12.38±0.37abc	1.62±0.88ab	10.76±0.55bcd	86.94±4.05de
H04	农大108	11.76±1.39bc	0.50±0.14cd	11.27±0.78bcd	95.76±0.63ab
H05	隆平206	13.27±0.80ab	0.92±0.65bcd	12.35±0.61ab	93.04±3.00abcd
H06	先玉335	13.83±0.68a	0.57±0.09cd	13.25±0.44a	95.85±0.51ab
H07	农大372	12.56±0.43abc	1.32±0.14abc	11.25±0.33bcd	89.53±0.83bcde
H08	登海605	13.69±0.94a	1.64±0.58ab	12.05±0.64abc	88.01±2.58cde
H09	伟科702	13.87±0.89a	0.25±0.17d	13.62±0.50a	98.18±0.66a
H10	MC 812	13.93±0.54a	0.64±0.33cd	13.29±0.30a	95.41±1.32abc
H11	郑单958	11.68±0.82c	0.76±0.31bcd	10.92±0.49bcd	93.53±1.61abcd
H12	京科968	12.49±1.17abc	2.04±0.10a	10.45±0.96cd	83.70±4.59e

品种编号	品种名称	对照产量/(t/hm²)	遮光产量/(t/hm²)	产量差/(t/hm²)	减产幅度/%
H01	中单2号	13.31±0.49ab	1.17±0.04abcd	12.13±0.29abc	91.20±0.30abcd
H02	掖单13	11.46±0.73c	1.31±0.43abc	10.14±0.49d	88.54±2.13bcde
H03	浚单20	12.38±0.37abc	1.62±0.88ab	10.76±0.55bcd	86.94±4.05de
H04	农大108	11.76±1.39bc	0.50±0.14cd	11.27±0.78bcd	95.76±0.63ab
H05	隆平206	13.27±0.80ab	0.92±0.65bcd	12.35±0.61ab	93.04±3.00abcd
H06	先玉335	13.83±0.68a	0.57±0.09cd	13.25±0.44a	95.85±0.51ab
H07	农大372	12.56±0.43abc	1.32±0.14abc	11.25±0.33bcd	89.53±0.83bcde
H08	登海605	13.69±0.94a	1.64±0.58ab	12.05±0.64abc	88.01±2.58cde
H09	伟科702	13.87±0.89a	0.25±0.17d	13.62±0.50a	98.18±0.66a
H10	MC 812	13.93±0.54a	0.64±0.33cd	13.29±0.30a	95.41±1.32abc
H11	郑单958	11.68±0.82c	0.76±0.31bcd	10.92±0.49bcd	93.53±1.61abcd
H12	京科968	12.49±1.17abc	2.04±0.10a	10.45±0.96cd	83.70±4.59e

品种编号	品种名称	耐阴指数排名
H01	中单2号	5
H02	掖单13	6
H03	浚单20	3
H04	农大 108	11
H05	隆平206	7
H06	先玉 335	10
H07	农大372	4
H08	登海 605	2
H09	伟科702	12
H10	MC 812	9
H11	郑单 958	8
H12	京科 968	1