冬小麦轮选987航天辐射二代农艺性状变异观察及分析  

Observation and Analysis of Agronomic Characters Variation of Space Radiation SP_2 Generation in Winter Wheat Lunxuan 987

作　　者：李慧敏[1] 赵凤梧[1] 杨建忠[1] 李爱国[1] 李明哲[1] 郝永波[1] 彭海成[1] 

机构地区：[1]河北省农林科学院旱作农业研究所,河北衡水053000

出　　处：《华北农学报》2009年第B08期68-71,共4页Acta Agriculturae Boreali-Sinica

基　　金：河北省国际科技合作基金(08395504D);河北省自然科学基金(C2007000977);国家科技支撑计划基金(2008BAD97B01)

摘　　要：通过对我国首颗航天育种专用卫星“实践八号（2006）”搭载冬小麦轮选987SP2分离世代及地面对照农艺性状进行观察发现：航天辐射诱导冬小麦轮选987发生变异，sP2群体变异株率为4．06％。在入选的变异后代中，株高、穗长、株穗数、主茎小穗数、主茎穗粒数、主茎小穗密度、单株平均穗粒数、千粒重诸性状变异幅度不一，分别为-40．39％～29．40％、-30．23％～40．70％、-70．37％～107．41％、-47．78％～14．88％、-22．22％-78．78％、-69．07％。44．33％、-55．57％-21．63％、-59．66％．29．99％和-81．12％．84．80％。变异是双向的，上述性状间正向变异株率为0．74％。2．75％，负向变异株率为1．27％．2．90％。就单一性状而言，上述各性状单株变异率分别为4．05％，3．87％，3．44％，2．50％，3．39％，2．45％，4．05％和4．02％。A study of space radiation （Satellite Shi-Jian 8,2006） was carried out on winter wheat Lunxuan 987 and the results of its derivated SP2 showed：Space radiation could induce its variation, plant mutation rate （MR） was 4.06 %. Different characters performed a varied MR, range of variation of plant height, head length, heads/plant, spikelets/main stem, spikelets density, seeds/plant, 1 000-grain weight were -40.39%--29.40%, -30.23%--40.70%, -70.37%--107.41%, - 47.78%--14.88%, - 22.22%--78.78%, - 69.07%--44.33%, - 55.57%-- 21.63 %, - 59.66 %--29.99 % and - 81.12 %--84.80 % individually. Variation was bidirectional, 0.74 % - 2.75 % positive variation and 1.27 %--2.90 % negative one was recorded for the above characters. For every character the plant MR was 4.05 %, 3.87 %, 3.44 %, 2.50 %, 3.39 %, 2.45 %, 4.05 % and 4.02 %, respectively.

关 键 词：小麦 轮选987 航天辐射 SP2 诱变率 性状变异 

分 类 号：S512.03[农业科学—作物学]