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987 SP2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%。
关键词:
小麦,
轮选987,
航天辐射,
SP2,
诱变率,
性状变异
Abstract: A study of space radiation (Satellite Shi -Jian 8,2006)was carried out on winterwheat 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.
Key words:
Wheat,
Lunxuan987,
Spaceradiation,
SP2,
Mutationrate,
Charactervariation
中图分类号:
LIHui-min, ZHAOFeng-wu, YANGJian-zhong, LIAi-guo, LIMing-zhe, HAOYong-bo, PENGHai-cheng. Observation and Analysis of Agronomic Characters Variation of Space Radiation SP2 Generation in Winter Wheat Lunxuan 987[J]. ACTA AGRICULTURAE BOREALI-SINICA, doi: 10.7668/hbnxb.2009.S1.017.