半干旱条件下粳稻米外观品质性状的QTL分析  

QTL mapping for appearance quality traits of japonica rice seeds under semi-arid conditions

作　　者：赵飞[1] 尹维娜[1] 肖艳云[2] 东丽 唐亮[4] 孙健[4] 华泽田 

机构地区：[1]天津农学院,天津300384 [2]天津天隆种业科技有限公司,天津300457 [3]国家粳稻工程技术研究中心,天津300457 [4]沈阳农业大学水稻研究所,辽宁沈阳110161

出　　处：《干旱地区农业研究》2015年第3期117-123,共7页Agricultural Research in the Arid Areas

基　　金：国家863项目"强优势粳稻杂交种的创制与应用"(2011AA10A101)

摘　　要：为了探讨半干旱条件对水稻外观品质的影响,本研究以224份F6世代的Z601/C14重组自交系(Recombinant inbred lines简称RILs群体)为试材,在节水灌溉的条件下,对稻米外观品质性状进行了相关性分析,并对控制稻米外观品质的数量性状位点QTL进行了分析。结果表明:垩白粒率与整精米面积(r=0.236)、垩白度(r=0.659)呈极显著正相关,透明度与整精米的长/宽(r=-0.481)、整精米粒长(r=-0.166)呈极显著负相关,与整精米粒宽(r=0.283)呈极显著正相关,带胚率与垩白度(r=-0.269)呈极显著负相关。共检测34个控制外观品质性状的QTL,控制整精米粒长的3个、整精米粒宽8个、整精米面积3个、整精米长/宽6个、垩白粒率3个、垩白度1个、透明度5个、带胚率5个,分布于第3、5、6、7、8、11和12号染色体上。In order to investigate the effects of the semi-arid conditions on rice quality ,an F6-generation rice recom-binant inbred population （referred to as RILs population ） containing of 224 lines derived from crosses between Z601 and C14 was selected as experimental materials .Under the conditions of water-saving irrigation ,the correlation between ap-pearance quality traits and associated quantitative trait loci （QTL ） was analyzed .The result showed that the percentage of grains with chalkiness was significantly positively correlated with area of milled rice （ r=0 .236 ） and endosperm trans-parency（r=0 .659） .Endosperm transparency was extremely significantly negatively correlated with ratio of milled rice length-width （ r= -0 .481 ） ,and length of milled rice （ r= -0 .166 ） was significantly positively correlated with width of milled rice（ r=0 .283） .Degree of milled rice embryos was extremely significantly negatively correlated with degree of endosperm chalkiness （ r= -0 .269 ） .A total of 34 QTLs controlling milling quality traits in rice were detected ,includ-ing three QTL controlling length of milled rice ,eight QTL controlling width of milled rice ,three QTL controlling area of milled rice ,six QTL controlling ratio of milled rice length-width ,three QTL controlling percentage of grain with chalki-ness ,one QTL controlling degree of endosperm chalkiness ,five QTL controlling endosperm transparency ,and five QTL controlling degree of milled rice embryos ,which were located on chromosome 3 ,5 ,6 ,7 ,8 ,11 and 12 ,respectively .

关 键 词：水稻 干旱胁迫 外观品质 相关分析 数量性状位点 

分 类 号：S511.22[农业科学—作物学] S503.4