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当前位置: 首页 > 文章 > 水稻种质资源的苗期抗旱性鉴定 江西农业大学学报 2012,34 (3) 428-433+444
Position: Home > Articles > Screening of Rice Germplasm Accessions for Vegetative Drought Tolerance Acta Agriculturae Universitatis Jiangxiensis 2012,34 (3) 428-433+444

水稻种质资源的苗期抗旱性鉴定

作  者：
肖宇龙;余传元;雷建国;Quirino D.Dela Cruz;Jonalyn M.Cstillo;Dindo A.Tabanao
单  位：
Central;Philippine;江西省农业科学院水稻研究所
关键词：
水稻种质资源;苗期;抗旱性;卷叶;枯叶;复水恢复率
摘  要：
试验利用菲律宾旱季无雨的自然干旱条件,大田鉴定了192份水稻种质资源的苗期抗旱性。试验结果表明,水稻种质中存在大量的具有苗期抗旱性的品种。就所观察的三个性状:卷叶(leaf rolling,LeR),枯叶(leaf drying,LeD)及复水恢复(drought recovery rate,DRR)而言,11个水稻品种在卷叶性状(LeR)上,12个水稻品种在枯叶性状(LeD)上极显著优于抗旱性对照品种NSIC Rc 9,14个品种在复水恢复性状(DRR)上显著优于抗旱性对照品种NSIC Re 9。有的品种在两个,甚至3个性状上都比抗性对照显著,表明不同的品种可能采取不同的机制来适应干旱胁迫,如降低叶片面积,及早发深根等:同一抗旱机制也可以作用于不同的表型上,如渗透势调节(Osmoticadiustment)。3个性状间存在极显著的相关,其中LeD与DRR的相关性最高为0.821 62,其次为LeD与LeR为0.801 79和LeR与DRR为0.725 93。对抗旱性性状的选择最好使用田间筛选,因为大田筛选提供了性状表达的真实环境;卷叶,枯叶,和复水恢复能力作为苗期抗旱性指标能有效地筛选苗期抗旱性品种。
译  名：
Screening of Rice Germplasm Accessions for Vegetative Drought Tolerance
作  者：
XIAO Yu-long~1,YU Chuan-yuan~1,LEI Jian-guo~1,Quirino D.Dela Cruz~2, Jonalyn M.Cstillo~3,Dindo A.Tabanao~3 (1.Rice Research Institute,Jiangxi Academy of Agricultural Science,Nanchang 330200 China;2.Central Luzon State University(CLSU);3.Philippine Rice Research Institute(PhilRice))
关键词：
rice germplasm accessions;;vegetative stage;;drought resistant;;leaf rolling;;leaf drying;;drought recovery rate
摘  要：
Taking advantage of the natural condition i.e.no rainfalls during the dry-season in the Philippines,192 rice germplasm accessions for vegetative drought tolerance were screened in the field.As of the three traits i.e..Leaf Rolling(LeR),Leaf Drying(LeD) and Drought Recovery Rate(DRR) observed,11 and 12 rice genotypes showed extremely significantly lower score compared with the resistant check variety NSIC Rc9 in Leaf Rolling and Leaf Drying,respectively,14 genotypes showed significantly lower DRR score as compared with the resistant check variety NSIC Rc9.Some genotypes showed significance in two traits and some even in three traits,indicating that:different genotypes might use the same mechanism to adapt to drought stress,e.g.reduced leaf area and fast development of deep root systems;the same drought resistant mechanism might also be responsible for the expression of different traits,e.g.osmotic adjustment.Extremely significant correlation was found among the three traits,among which that between LeD and DRR was the highest,making 0.821 62,followed by that between LeD and LeR,0.801 79 and between LeR and DRR,0.725 93.Field screening for drought tolerance traits is most advisable if possible,since it provides the realistic environmental conditions under which the traits are expressed.LeR,LeD and DRR are effective to be used as indices for screening rice germplasm accessions for vegetative drought tolerance.

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