Rice (Oryza sativa L.) germplasm with better seedling emergence under direct sowing in flooded paddy field

被引:2
|
作者
Kashiwagi, Junichi [1 ]
Hamada, Koji [2 ]
Jitsuyama, Yutaka [1 ]
机构
[1] Hokkaido Univ, Grad Sch Agr, Crop Sci Lab, Kita Ku, Kita 9,Nishi 9, Sapporo, Hokkaido 0608589, Japan
[2] Kubota Ltd, Transplanter Engn Dept, Naniwa Ku, Osaka 5568601, Japan
来源
PLANT GENETIC RESOURCES-CHARACTERIZATION AND UTILIZATION | 2018年 / 16卷 / 04期
关键词
core collection; hypoxia germination; Oryza sativa L; pot-based screening method; DIRECT-SEEDED RICE; CENTRAL CHINA; SOIL SURFACE; SOWN;
D O I
10.1017/S1479262118000011
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Direct sowing of rice in a flooded paddy field is a beneficial cultivation practice for water use and labour efficiency, compared to the transplanted cultivation. However, a drastic reduction in seedling emergence under flooded paddy fields is a serious constraint especially when the seeds fell at deeper soil layers. Suitable rice germplasm for the direct sowing in flooded paddy fields could ensure the success of this cultivation practice. Instead of laborious field-based screening systems, a pot-based screening method was adopted for simplicity and efficient evaluation of seedling emergence of a subset of world rice germplasm (n = 75) at different sowing depths. As a result, two rice genotypes, 'Vary Futsi' (landrace from Madagascar, non-glutinous, subspecies Indica) and 'Dahongge' (landrace from China, non-glutinous, subspecies Indica), with consistently better seedling emergence were identified from a wide range of rice germplasm. These genotypes could serve as excellent parents for the breeding program in developing new rice cultivars with the improved seedling emergence in flooded paddy fields. There were no significant differences in the seedling emergence rate in flooded paddy conditions among the groups from various agro-geographical regions.
引用
收藏
页码:352 / 358
页数:7
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