Drought adaptability analysis of barley germplasm based on yield-related traits
In 2019-2021,the yield-related trait data of 62 barley germplasm resources under different irriga-tion conditions were analyzed to examine the correlation between barley yield-related traits and irrigation.The results showed that the growth period of z1450066w was relatively short,with 82.67 days under normal irrigation condition and 65.33 days under drought stress.The ear length of TRADI70w was relatively long,with a normal irri-gation value of 7.82 cm and a drought stress value of 8.11 cm.ZDM5458 had a high yield,with 397.93 g·m-2 un-der normal irrigation condition and 309.52 g·m-2 under drought stress showing a trend of increased yield in all three experimental years.Based on the different adaptive ability of 62 germplasm samples for yield-related traits un-der drought stress,they were categorized into five classes.Class Ⅰ showed better performance in effective tillering and thousand kernel weight traits under drought stress.Classes Ⅱ and Ⅲ showed better performance in spike length and plant height traits,respectively.Class Ⅳ showed better performance in kernels per spike and yield traits,and Class Ⅴ showed better growth stage traits.Barley growth stages,plant height,spike length,effective tillering,ker-nels per spike and yield were reduced by 14.25％,11.37％,1.64％,5.68％,7.61％and 27.98％,respectively,under drought stress compared with normal irrigation.Under normal irrigation,spike length was highly significantly with plant height and thousand kernel weight.Effective tillering was highly significantly negatively correlated,highly significantly positively correlated,and significantly negatively correlated with spike length,growth stages and kernels per spike,respectively.Thousand kernel weight,plant height and yield were all highly significant and posi-tively correlated.Under drought stress,spike length was significantly negatively correlated,highly significantly neg-atively correlated,and highly significantly positively correlated with kernels per spike,thousand kernel weight and yield,respectively.Effective tillering showed highly significant negative and highly significant positive correlation with plant height and thousand kernel weight,respectively.Growth stage showed highly significant positive correla-tion with thousand kernel weight.Meanwhile,four drought-resistant barley germplasm resources(ZDM5458,GER-TROV,ZDM5430,G0401018K-1)were screened.ZDM5458 had higher yield under drought stress,GERTROV and ZDM5430 had higher number of kernels per spike under drought stress,and G0401018K-1 had higher effective tillering under drought stress.
万方数据
维普
