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中国农学通报 ›› 2021, Vol. 37 ›› Issue (2): 1-6.doi: 10.11924/j.issn.1000-6850.casb20200300196

• 农学·农业基础科学 •    下一篇

‘隆科638S’与红颖恢复系‘先恢XK01’的混播制种效果初探

曾佳1(), 刘玲2, 谭炎宁3, 许可3, 孙学武3, 欧阳宁2, 袁贵龙3, 袁定阳3(), 段美娟1()   

  1. 1湖南农业大学,长沙 410128
    2湖南大学研究生院隆平分院,长沙 410125
    3湖南杂交水稻研究中心 杂交水稻国家重点实验室,长沙 410125
  • 收稿日期:2020-03-12 修回日期:2020-05-18 出版日期:2021-01-15 发布日期:2021-01-14
  • 通讯作者: 袁定阳,段美娟
  • 作者简介:曾佳,男,1996年出生,湖南邵阳人,硕士,研究方向:遗传学专业。通信地址:410128 湖南省长沙市芙蓉区湖南农业大学,E-mail:610792369@qq.com
  • 基金资助:
    国家重点研发计划课题“水稻良种繁育关键技术研究与示范”(2018YFD0100802);国家自然科学基金“适于混播制种的水稻红颖基RH4调控类黄酮生物合成的机理”(31771767);湖南省科技人才托举工程项目“中青年学者培养计划”(2019TJ-Q08)

Mixed Seeding of ‘Longke638S’ and Red-hull line ‘XianhuiXK01’

Zeng Jia1(), Liu Ling2, Tan Yanning3, Xu Ke3, Sun Xuewu3, Ouyang Ning2, Yuan Guilong3, Yuan Dingyang3(), Duan Meijuan1()   

  1. 1Hunan Agricultural University, Changsha 410128
    2Long Ping Branch, Graduate School of Hunan University, Changsha 410125
    3Hunan Hybrid Rice Research Center, State Key Laboratory of Hybrid Rice, Changsha 410125
  • Received:2020-03-12 Revised:2020-05-18 Online:2021-01-15 Published:2021-01-14
  • Contact: Yuan Dingyang,Duan Meijuan

摘要:

隐性红色颖壳资源是杂交水稻混播制种理想的遗传工具。为选育优质高产适用于混播制种的杂交新组合,本次研究探讨了‘隆科638S’与红颖恢复系‘先恢XK01’混播制种的产量影响因素。以‘隆科638S’为母本,红颖恢复系‘先恢XK01’为父本,基于正交设计法设计了3个因素:父本处理方式(抛秧和干处理)、播种方式(机械混直播、人工混撒播)、父母本比例(6:1、9:1、12:1、15:1),母本结实后进行小区测产,并通过五点法随机取5株样本考种,事后采用SPSS等软件进行数据分析。研究结果表明,‘隆科638S’与红颖恢复系‘先恢XK01’混播制种中父母本比例是影响产量的主要因素。最佳参数为机械成条形播、父母本比例(6:1)、父本抛秧播种,此时制种产量最高,为4157.85 kg/hm2,异交结实率为66.8%。初步得出结论该组合父母本花期相遇理想,产量高,异交结实率高,基本符合机械化制种的要求。本试验为机械化混播制种提供了数据参考。

关键词: 杂交水稻, 红颖恢复系, 混播制种, 正交设计, 父母本比例, 机械化制种

Abstract:

The recessive red hull rice is an ideal genetic tool for hybrid rice seed production. In order to breed new hybrid combinations with high yield and quality which are suitable for mixed seeding, we explored the yield factors on mixed seeding ‘Longke638S’ and the Red-hull line ‘Xianhui XK01’.‘Longke638S’ was used as female parent and red-hull line ‘XianhuiXK01’ as the male parent, based on the orthogonal design method, we designed three factors: the treatment of male parent (throw-planting or unaccelerating germination before sowing), seeding method (mechanized or artificial mixed seeding), parental lines ratio (fixed female/male seed ratio of 6: 1, 9:1, 12:1, 15:1). The plots yield was measured when the seed parents were ripe. The plant laboratory test was conducted by randomly sampling five individual plants in each plot. SPSS and other software were used for data analysis. The results showed that parental lines ratio was the main factor affecting seed yield on the mixed seeding of ‘Longke638S’ and ‘XianhuiXK01’. The optimal parameter was mechanized mixed seeding, parental lines ratio (6:1), and pollen parent seed treated by throw-planting. In this case, the seed production yield was the highest, up to 4157.85 kg/hm2, and the outcrossing rate was 66.8%. In conclusion, the parental lines flowering at the same time and the seed parent has high yield and outcrossing rate, and basically conforms to the requirements of mechanized seed production. This experiment provides data for the seed production of mechanized mixed seeding in the future.

Key words: hybrid rice, red-hull line, mixed seeding, orthogonal design, parental lines ratio, mechanized seed production

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