| 杨志涛1，李 媛2，张少红3，杨梯丰3，赵均良3，董景芳3，陈光辉1，刘 斌1，2，3.377 份多样性国际稻种低温发芽力评价[J].广东农业科学,2017,44(4):1-6 |
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377 份多样性国际稻种低温发芽力评价 |
| Evaluation of low temperature germinabilityof 377 national rice accessions |
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| DOI：10.16768/j.issn.1004-874X.2017.04.001 |
| 中文关键词: 水稻 低温发芽力 种质鉴定 直播 |
| 英文关键词: rice low temperature germinabitity germplasm identification direct seeding |
| 基金项目:广东省科技计划项目（2015B020201001）；广东省现代农业科技创新联盟建设共性关键技术创新团队
项目（2016LM2148） |
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| 中文摘要: |
| 低温发芽力差是华南双季稻早季水稻直播的主要限制因素之一。在稻种资源中筛选鉴定强低
温发芽力的种质，开展强低温发芽力水稻育种是解决这一问题最经济有效的途径。为了筛选强低温发芽力
的种质，在13℃低温下对377 份来自56 个国家和地区的多样性水稻种质的发芽力进行测试。结果表明，这
些稻种低温发芽率的变异范围在0～98.0% 之间，平均值为37.6%，变异系数为76.4%，表现出丰富的多样
性。鉴定出21 份低温发芽率超过90% 的优良种质。比较籼稻、粳稻和Aus 稻3 种类型稻种的低温发芽率结
果显示，籼稻组平均低温发芽率为48.7%，粳稻组为33.6%，Aus 稻组为22.9%，籼稻组低温发芽率极显著
高于粳稻和Aus 稻组，粳稻组低温发芽率显著高于Aus 稻组。研究结果为水稻强低温发芽力种质的收集提
供了科学依据，并为水稻低温发芽力改良和分子遗传研究挖掘了优良材料。 |
| 英文摘要: |
| The poorer low temperature germinability（LTG）of rice cultivars in the early cropping-season
is one of the main factors limiting direct seeding in the double cropping regions in South China. Screening rice
germplasm with strong LTG and breeding rice variety with strong LTG is the most economical and effective way to
solve this issue. To identify rice germplasm with strong LTG，377 rice accessions from 56 countries and regions
were subjected to 13℃ and their germination rates at low temperature were evaluated. The results showed that LTG
of these rice accessions varied from 0 to 98.0% and the average germination rate was 37.6% with 76.4% of variation
coefficient. 21 accessions had a LTG over 90%. Significant differences in LTG were observed among the three types
of rice，indica，Aus and japonica. The average LTG of indica was highly significantly higher than that of japonica
and Aus（ P ＜ 0.01），respectively，and the average LTG of japonica was significantly higher than that of Aus（ P
＜ 0.05）. The results provide a good basis for screening of rice germplasm with strong low temperature germinabilityand the 21 rice accessions with LTG over 90% could be good materials for breeding and gene discovery associated
with strong low temperature germinability in rice. |
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