适合蓄留再生的杂交稻品种筛选
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国家重点研发计划项目(2017YFD0100303);国家自然科学基金项目(31771886);湖南省科技重大专项(2018NK1020);湖南省重点研发计划项目(2017NK2013);长沙市科技计划项目(KC1703036)


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    摘要:

    以17个杂交稻品种为试验材料,以Y两优9918、准两优608为对照材料,以生育期、头季茎秆抗折力、头季产量、头季米质、再生季再生率、再生季产量、再生季米质为考察指标,采用随机区组设计,于2017、2018年在湖南长沙进行适合蓄留再生的杂交稻品种筛选。2年试验结果表明:两优389、望两优889蓄留再生(留桩高度30 cm),头季生育期均不超过140 d,再生季均在9月20日前安全齐穗,10月下旬安全成熟;头季茎秆抗折力、头季产量均高于对照品种;再生季再生率、再生季产量均高于对照品种;且两优389再生季米质与对照品种一致,达部颁二级,望两优889再生季米质达部颁三级;两优389、望两优889在长沙地区适合蓄留再生;供试材料的头季米质均未达到部颁优质等级评定标准,主要是由于整精米率较低和垩白度较高。

    Abstract:

    Hybrid rice varieties provided by our research group were used as tested varieties, and Y Liangyou 9918 and Zhunliangyou 608 were used as control varieties. The growth period, the flexural resistance in the main season, the grain yield in the main season, the grain quality in the main season, the ratoon rate, the grain yield in the ratoon season, and the grain quality in the ratoon season were collected in the random experiments as indicators. In two consequent years, 2017–2018, the varieties suitable for ratooning were screened in Changsha, Hunan. The results of two years showed that when Liangyou 389 and Wangliangyou 889 were used to ratoon (stubble height 30 cm), the growth period in the main season were not more than 140 d. Their flowering stage in the ratoon season were before the September 20th, and their mature stage in the ratoon season were in late October. The flexural resistance of them were higher than that of the control varieties. The grain yield in the main season of them were higher than that of the control varieties. The ratoon rate of them were higher than that of the control varieties. The grain yield in the ratoon season of them were higher than that of the control varieties. The grain quality in the ratoon season of Liangyou 389 was scored second grade that was consistent with the control varieties. The grain quality in the ratoon season of Wangliangyou 889 was scored third grade. Therefore, Liangyou 389 and Wangliangyou 889 were suitable for ratooning in the region of Changsha. The grain quality in the main season of the tested varieties didn’t meet the grain quality rating standard, which is mainly due to the lower head rice percentage and higher chalkiness.

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黄家兴,明兴权,张桂莲,王玉博,雷斌,周杰强,李凡,唐文帮.适合蓄留再生的杂交稻品种筛选[J].湖南农业大学学报:自然科学版,2021,47(1):.

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  • 在线发布日期: 2021-01-29
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