Drought is one of the most important abiotic stress factors for wheat yield．Thus it will play a signifi- cant role in wheat drought tolerance genetic improvement to study the inherited characteristic of drought resistance for wheat yield related traits．A total of 160 introgression lines(ILs) derived from a backcross((Jinmai47×Xifeng 20)×Jinmai47)(BC3F4)and their two parents were used as the plant materials to study the quantitative genetic characteristics，correlations for the traits including plant height(PH)，peduncle length(PL)，spike per plant (SPP)，spike length(SL)，total spikeletper plant(TSP)，gain number per plant(GNP)，spikelet per main spike (SMS)，gain number per main spike(GMS)，thousand- grain weight(TGW)and the plot grain yield (GY) in dif- ferent water environments，and evaluate the characteristics and genetic variation in the ILs．In different water envi- ronments，the mean value of each trait tended to be closer to the recurrent parent Jinmai 47．The genetic diversity indices range from 0．74 to 0．97．Some traits presented substantial transgressive segregation in the ILs， and the val- ues showed a sharp peak negative skew distribution．The target traits，such as PH，PL and TGW showed higher heri- tability (h2B=0．48～0．81) than the other traits (h2B=0．27～0．73) under four different water environments．Thesignificant positive correlations were detected between traits．The TGW and PH respectively had a higher correlation coefficient and relational grade with grain yield under drought stress condition．The ILs is a suitable population for studying drought tolerance quantitative traits．
WANG Hui-ru
,
WANG Guang-da
,
CHANG Xiao-ping
,
YANG De-long
,
JING Rui-lian
. Association and Genetic Analysis of Yield Related Traits in Introgression Lines of Wheat in Different Water Environments[J]. Acta Agriculturae Boreali-Sinica, 2013
, 28(4)
: 53
-61
.
DOI: 10.3969/j.issn.1000-7091.2013.04.010
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