CAJ | 학술논문

目的探索干旱胁迫对水稻萌芽期生长的影响，筛选水稻萌芽期抗旱性指标。方法以粳型、籼型常规稻及空间诱变稳定后代株系等共62个水稻品种（系）为试验材料，利用聚乙二醇（ PEG-6000）模拟干旱胁迫，研究了干旱处理对水稻萌发期芽鞘长、最长根长、芽干质量、根冠比等8个形态和生理指标的变化。利用隶属函数分析方法对所有材料进行综合抗旱能力评价。结果和结论干旱胁迫严重影响了水稻的萌发，对根长的抑制最明显；根干物质积累比芽干物质积累受干旱胁迫的抑制更明显。芽鞘长和最长根长与水稻萌芽期综合抗旱能力极显著相关，且2个指标间无相关性，适合用作水稻萌发期抗旱鉴定指标。根据水稻萌发期抗旱性和综合抗旱能力评价，从62个水稻品种（系）中筛选出14个高抗旱品种（系），用于后续抗旱研究。
목적탐색간한협박대수도맹아기생장적영향，사선수도맹아기항한성지표。방법이갱형、선형상규도급공간유변은정후대주계등공62개수도품충（계）위시험재료，이용취을이순（ PEG-6000）모의간한협박，연구료간한처리대수도맹발기아초장、최장근장、아간질량、근관비등8개형태화생리지표적변화。이용대속함수분석방법대소유재료진행종합항한능력평개。결과화결론간한협박엄중영향료수도적맹발，대근장적억제최명현；근간물질적루비아간물질적루수간한협박적억제경명현。아초장화최장근장여수도맹아기종합항한능력겁현저상관，차2개지표간무상관성，괄합용작수도맹발기항한감정지표。근거수도맹발기항한성화종합항한능력평개，종62개수도품충（계）중사선출14개고항한품충（계），용우후속항한연구。
Objective] To study the effect of drought stress on rice growth at germination stage and screen rice drought resistance indicators quickly and efficiently .[Method]Sixty-two rice varieties ( lines) ,inclu-ding indicia and japonica rice and space-induced mutants , were studied under drought artificially created by PEG-6000 .Eight indicators such as shoot length ,maximum root length ,coleoptile length , root number and shoot dry mass etc .were tested under stressed and control conditions .[Result and conclusion]Rice germination , especially the root length , was seriously affected by drought stress , and the impact of drought stress on root dry matter accumulation was much greater than that of shoot dry matter accumula-tion.Two indicators of maximum root length and coleoptile length significantly correlated with the com-prehensive drought capability which were suitable for drought resistance screening at rice germination stage .Fourteen out of 62 materials have been identified to be highly drought resistant through dynamic clustering statistics , which will be promising for rice drought resistance breeding .