Evaluation of the Characteristics in Miyakogusa (Lotus corniculatus L. var. japonicus Regele) : 2. Relationships Among the Characteristics in Miyakogusa and 7 Lotus spp.

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  • ミヤコグサ(Lotus corniculatus L. var. japonicus Regel)の特性評価 : 2.ミヤコグサ及び近縁種(Lotus spp.)の形質間の関係
  • ミヤコグサ Lotus corniculatus L.var.japonicu

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In order to characterize Miyakogusa, Lotus corniculatus L. var. japonicus Regel, seventy strains collected from all over Japan were evaluated compairing with relating seven species (shown in Table 1 in the previous report) in the fertilized and unfertilized field in 1982 and 1983. Seven characteristics (shown in Table 2 in the previous report) were investigated. According to the data, correlations among the characteristics were calculated. In addition, the composite characteristics of Miyakogusa and relating species were indicated based on principal component analysis. The results were as follows; 1. The correlation coefficients calculated from the mean value of fertilized and unfertilized data were shown in Table 1. Plant height at about six months after seeding correlated with plant weight and seed yield in L. corniculatus var. japonicus and L. corniculatus but not in L. uliginosus. Plant weight correlated with plant height, stem number and stem size in L. corniculatus var. japonicus, L. corniculatus, L. uliginosus and L. tenuis. Early flowering time correlated with higher plant height in these four species. 2. Superiority of composite characteristics of regrowth, fall vigor, plant weight and surviving plant percentage was expressed in negative area of first principal component. Superiority of composite characteristics of seed yield, plant height at 60 days after seeding and earliness of flowering were expressed in negative area of second principal component. Thirteen out of 32 strains of L. corniculatus were distributed in the third quadrant, on the other hand, only four out of seventy strains of L. corniculatus var. japonicus were distributed in the third quadrant. From these results, Birdsfoot trefoil was superior in the composite characteristics of regrowth, fall vigor, plant weight and surviving plant percentage, on the contrary, Miyakogusa was inferior in this composite characteristics. On the other hand, Miyakogusa and Birdfoot trefoil indicated great variability in the composite characteristics of seed yield, plant height at 60 days after seeding and earliness of flowering.

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