CAJ | 학술논문

采用旱地直播种植,以5个水稻不育系品种为试验材料,研究了其叶蘖生长对干旱的响应,为耐旱水稻不育系的筛选提供依据和指标.结果表明,不同水稻不育系品种的叶片生长速度无明显差异;分蘖速度在前期无明显差异,而后期存在明显差异,以Y58s最快;单蘖重存在明显差异,以Y58s最大;相关分析可知,不育系3~5叶的出叶速度与其单蘖重存在极显著负相关,即3~5叶的出叶速度能衡量水稻不育系的耐旱性,可作间接的育种选择指标在生产上应用.综合评价可知,Y58s和天丰A的耐旱性较强,可在旱稻育种中作不育系使用.
채용한지직파충식,이5개수도불육계품충위시험재료,연구료기협얼생장대간한적향응,위내한수도불육계적사선제공의거화지표.결과표명,불동수도불육계품충적협편생장속도무명현차이;분얼속도재전기무명현차이,이후기존재명현차이,이Y58s최쾌;단얼중존재명현차이,이Y58s최대;상관분석가지,불육계3~5협적출협속도여기단얼중존재겁현저부상관,즉3~5협적출협속도능형량수도불육계적내한성,가작간접적육충선택지표재생산상응용.종합평개가지,Y58s화천봉A적내한성교강,가재한도육충중작불육계사용.
Five rice sterile lines varities were sowed directly in dry land and used as the experimental materials,the responses of leaf and tillering growths in the rice sterile lines(RSLs) to drought were conducted to provide the screening basis and index for drought resistance. The results showed that the differences of leaf growth rate and early tillering rate in the different RSLs weren't significant,but those of late tillering rate were significant with the maximum of Y58s. The single-tiller weights in different RSLs had the obvious differences with the maximum of Y58s. The correlation analysis revealed that extremely significant negative correlation between 3~5 leaf growth rates and single-tiller weight in RSLs,which indicated that leaf growth rate from 3 to 5 could evaluate the drought resistance of RSLs,it could be used as a indirect index to apply in rice breeding. Comprehensive evaluation showed that Y58s and Tianfeng A were used as the sterile line of upland rice breeding because of their stronger drought resistance.