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Seed Setting and Its Spatial Characteristics in Tartary Buckwheat(Fagopyrum tataricum)

Phyton-International Journal of Experimental Botany 2022年第8期91卷 1659-1669页

作者： Dabing Xiang Yue Song Chao Song Yan Wan Xueling Ye Changying Liu Chenggang Liang Gang Zhao Key Laboratory of Coarse Cereal Processing Ministry of Agriculture and Rural AffairsCollege of Food and Biological EngineeringChengdu UniversityChengdu610106China French Associates Institute for Agriculture&Biotechnology of Drylands Jacob Blaustein Institutes for Desert ResearchBen-Gurion University of the NegevBeersheba84990Israel Research Center of Buckwheat Industry Technology Guizhou Normal UniversityGuiyang550001China

A low seed-setting rate is the main limiting factor influencing Tartary buckwheat production under high-yield cultivation *** investigate the seed setting and its spatial characteristics,two Tartary buckwheat cultivars(high seed-setting rate cultivar Qianku 3;low seed-setting rate cultivar Liuku 3)were compared by a two-year field trial in 2017 and *** results showed that the Tartary buckwheat underwent simultaneous flowering and ***,generated from branch,were still blooming during the mature stage of grains on stem,which resulting in a greater number of flowers and grains on the branch than those on the stem at the low part of *** seed-setting characteristics significantly differed between two *** high seed-setting rate of Qianku 3 was 26.6%and 33.2%higher than Liuku 3 in 2017 and 2018,***,Qianku 3 showed a higher filled grain number(157.8%)and seed-setting rate(66.4%)on branch than Liuku 3.A network analysis showed that the whole-plant seed-setting rate was positively correlated with grain number,which was closely correlated with flower number at the same position of *** path-coefficient analysis revealed that grains number on branches was the most dominant component(path coefficient(P)=2.19)of the seed-setting rate,followed by grains number on stem(P=0.60).The grains number on branches showed the greatest positive direct effect with significant correlation(r=0.76 and P<0.01)on the seed-setting ***,the present study indicated that the grain number of branches may play a vital role in improving the seed-setting rate in Tartary buckwheat.

关键词： Grain number path-coefficient analysis seed-setting rate tartary buckwheat

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