《Table 3 Indicators related to yield and sink capacity》

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《Characteristics of Sources and Sinks of Yugu 18》

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Sink capacity and the ability to fill sinks can be calculated as follows:sink capacity=the number of effective ears per hectare×the total number of grains per ear×the weight of a thousand full seeds×10-6，and the ability to fill sinks=The number of effective ears per hectare×the total number of grains per ear×fruiting rate×the weight of a thousand seeds expect empty seeddss×10-6/sink capacity[6].Seen from Table 3，the number of eff--fective ears，the number of grains per ear，fruiting rate，sink caa--pacity，yield and the ability to fill sinks of Yugu 18 was superioorr to those of Jigu 19.The yield of Yugu 18 was up to 6 999.388kg/hm2，13.38%higher than that of Jigu 19.Meanwhile，thhee sink capacity and the ability to fill sinks of Yugu 18 were 1.3 andd1.1 times larger than those of Jigu 19.Analysis of variance shows that there were significant differences between Yugu 18 and Jigu19 in the number of grains per ear and fruiting rate，and the differences of sink capacity，yield and the ability to fill sinks were extremely significant.It indicates that Yugu 18 was superior in sink capacity and the ability to fill sinks，which promoted the formation of its high yield.