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Acta Agronomica Sinica ›› 2019, Vol. 45 ›› Issue (2): 310-315.doi: 10.3724/SP.J.1006.2019.83034

• RESEARCH NOTES • Previous Articles     Next Articles

Silking duration characteristics in different maize hybrids and its response to sowing date

Yue-E LIU,Tian-Fang LYU,Jiu-Ran ZHAO(),Rong-Huan WANG(),Tian-Jun XU,Chuan-Yong CHEN,Yi-Tian ZHANG,Yuan-Dong WANG,Xiu-Zhi LIU   

  1. Maize Research Center, Beijing Academy of Agriculture & Forestry Sciences / Beijing Key Laboratory of Maize DNA Fingerprinting and Molecular Breeding, Beijing 100097, China
  • Received:2018-04-18 Accepted:2018-10-08 Online:2019-02-12 Published:2018-11-05
  • Contact: Jiu-Ran ZHAO,Rong-Huan WANG E-mail:maizezhao@126.com;ronghuanwang@126.com
  • Supported by:
    This study was supported by the National Key Research and Development Program of China(2016YFD0300106);This study was supported by the National Key Research and Development Program of China(2017YFD0101104);the National Natural Science Foundation of China(31601247);the China Agriculture Research System(CARS-02-11);the Youth Research Fund of the Beijing Academy of Agriculture and Forestry Sciences(QNJJ201728);and the Innovative Team Construction Project of BAAFS(JNKYT201603)

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Abstract:

Silking is an important growth stage and has important effects on maize (Zea mays L.) yield. The research of silking characteristics plays a fundamental role in maize productivity. To examine the silking characteristics difference of different maize hybrids and its responses to sowing date, we conducted an experiment with three sowing date (4/10, 5/10, 6/10) treatments using the most widely cultivated maize hybrids of Zhengdan 958 (ZD958), Xianyu 335 (XY335), and Jingke 968 (JK968). The silking duration difference between different hybrids and the relationship of silking duration with ear length variation and yield components were analyzed. The significant differences were found in silking durations with an order of XY335 (9.12 d) > ZD958 (8.94 d) > JK968 (7.68 d). The silking ratio per day was well correlated with days to silking (P < 0.05), A non-linear positive relationship existed between silking ratio per day (y) and days to silking (x). The highest silking ratio per day showed an order of XY335 (16.51%) < ZD958 (17.07%) < JK968 (19.98%). Significant differences of silking duration were found between different sowing date treatments. The silking durations of ZD958, XY335, and JK968 in different sowing date treatment ranged from 8.10 d to 9.55 d (CV = 6.57%), from 7.54 d to 10.53 d (CV = 9.40%), from 6.55 d to 8.66 d (CV = 11.68%), respectively. Silking duration significantly and positively correlated the coefficient of variation of ear length, and negatively correlated with yield and kernel number per ear. No significant correlation was found between silking duration and 1000-kernel weight. Sowing date has significant effects on silking duration. With increasing silking duration , the coefficient of variation of ear length is increased significantly, the uniformity of ear length and kernel number per ear are decreased, resulting in maize yield decrease significantly.

Key words: maize, hybrid, silking duration, sowing date, yield

Fig. 1

Changes of maize silking ratio in different maize hybrids ** and * mean significant at the 0.01 and 0.05 probability levels, respectively."

Table 1

Silking duration changes of different hybrids"

品种
Hybrid		 2014 2015 平均值
Average (d)		 变异系数
Coefficient of variation (%)
May 10 June 10 April 10 May 10 June 10
郑单958 Zhengdan 958 9.23 8.10 9.24 9.55 8.59 8.94 a 6.57
先玉335 Xianyu 335 7.54 9.02 9.25 10.53 9.25 9.12 a 11.68
京科968 Jingke 968 6.65 7.54 7.67 8.66 7.89 7.68 b 9.40

Table 2

Tasseling date, silking date and interval between tasseling and silking change of different hybrids"

年份
Year		 播期
Sowing date
(month/day)		 品种
Cultivar		 抽雄日期
Tasseling date
(month/day)		 吐丝日期
Silking date
(month/day)		 抽雄吐丝间隔
Interval between tasseling and silking (d)
2014 5/10 郑单958 Zhengdan 958 7/8 7/9 1
先玉335 Xianyu 335 7/10 7/8 2
京科968 Jingke 968 7/10 7/11 1
6/10 郑单958 Zhengdan 958 8/3 8/5 2
先玉335 Xianyu 335 8/4 8/5 1
京科968 Jingke 968 8/6 8/8 2
2015 4/10 郑单958 Zhengdan 958 6/22 6/26 4
先玉335 Xianyu 335 6/23 6/25 2
京科968 Jingke 968 6/23 6/27 4
5/10 郑单958 Zhengdan 958 7/10 7/12 2
先玉335 Xianyu 335 7/9 7/11 2
京科968 Jingke 968 7/12 7/14 2
6/10 郑单958 Zhengdan 958 8/4 8/6 2
先玉335 Xianyu 335 8/5 8/6 1
京科968 Jingke 968 8/3 8/5 2

Fig. 2

Correlation relationship between maize silking duration and coefficient of variation of ear length ** and * mean significant at the 0.01 and 0.05 probability levels, respectively."

Fig. 3

Correlation between maize silking duration and yield components ** and * mean significant at the 0.01 and 0.05 probability levels, respectively."

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