Path analysis of yield and major agronomic traits in 11 triticale varieties(lines)in high-altitude cold region of Gansu Province
The experiment was to explore the factors affecting the yield of triticale varieties(lines)in the high-altitude cold region of Gansu Province,the experiment selected 11 triticale varieties(lines),and each variety(line)replicated three times,to conduct correlation and path analysis on the main agronomic traits,grain yield,and hay yield.The results showed that the main agronomic traits of triticale have both direct and indirect effects on the path analysis of grain yield and hay yield.From 10 indicators,nine factors with direct effects on grain yield were selected,in descending order:Spike length＞number of effective tillers＞thousand-grain weight＞number of fertile spikelets＞lower node of the spike＞number of grains per spike＞number of sterile spikelets＞plant height＞number of tillers.The traits also had direct and indirect effects on hay yield,and the direct effects of each factor on hay yield were in descending order:Lower node of the spike＞number of sterile spikelets＞number of fertile spikelets＞number of effective tillers＞second node from the top＞number of tillers＞number of grains per spike＞plant height＞thousand-grain weight.Plant height was negatively correlated with grain yield,but positively correlated with hay yield.When selecting high-yielding varieties in actual production,the positive and negative effects on the yields of both should be considered according to different utilization paths(grain or forage).The study indicates that T-133 can achieve high yields of both grain and hay and is suitable for promotion and cultivation in the high-altitude cold region of Gansu Province.
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