Analysis of yield components and the effect on grain yield with different rowed type barley introduced from CIMMYT
YANG Jin-hua,YU Ya-xiong*,LIU Li,CHENG Geng,HU Yin-xing,CHENG Jia-sheng(Food Crops Research Institute,Yunnan Academy of Agricultural Sciences,Yunnan Kunming 650205,China)
Barley is now becoming a promising crop in Yunnan province due to its priority to bread wheat such as shorter growth duration,resistance to stresses and alternate utilization(malting or feed).From 2004 to 2007,twenty-two advanced barley lines selected from International Maize and Wheat Improvement Center(CIMMYT) were put into the Regional Yield Trial in 6 locations with 10-11 lines every year by a run-in and run-out design.After discarding several incomplete data,totally 142 data sets were analyzed to evaluate the yield performance of different rowed barley and the effects of their yield components.The results showed that the average yield was ranked as six rowed barley two rowed-tall barley two rowed-dwarf barley,and the Coefficient of Variation(c.v.%) ranked the same way.As for the yield components,the two rowed-dwarf barley had the highest number of spikes per area and the lowest c.v.%,while the two rowed-tall barley had the highest 1000 grain weight with lowest c.v.%,and the six rowed barley had the highest grains per spike with high c.v.% but the lowest 1000 grain weight.For each of the three type barley,the simple correlations of three yield components to the yield was the same as 1000 grain weight spikes per area grains per spike,while the three correlations of the two rowed dwarf barley were of significant difference,and of the two rowed tall barley were the similar,but the correlation of grains per spike to yield of the six rowed barley was negative.The analysis of partial correlation showed that the coefficient of 1000 grain weight to yield is also the highest one and most correlations were negative among the three yield components.The gain yield of all lines,two rowed dwarf,two rowed tall and six rowed barley would be increased by 102.9,68.7,61.8 and 73.8 kg/hm2,respectively,when the 1000 grain weight increased 1g promoted.At the same time for two rowed tall barley,the yield will increase 86.5 kg/hm2 when the grains per spike increase 1 unit,reached a significant level.There were positively direct path coefficients for three yield components to yield,among them the contribution of the 1000 grain weight was the largest indicated the increasing of 1000 grain yield is the efficient way to increase grain yield during the late growing stage of barley.The indirect path coefficients were positive only between the grains per spike and 1000 grain weight,the others were negative.
【CateGory Index】： S512.3
【CateGory Index】： S512.3