강남콩의 Diallel Cross F₁ 및 F₂ 세대에 있어서 量的形質의 雜種强勢 發現

Heterosis in Some Quantitative Characters of Kidney Beans in F₁ and F₂ Generations by Diallel Grosses

The experimental studies had been undertaken to estimate the heterosis of 8 quantitative characters of kidney beans in F₁ and F₂ generations by diallel crosses. In F₁ generation, positive heterosis was observed in 5 characters of stem diameter, pod number per plant, grain number per pod, 50-grain weight and grain weight per plant. Negative heterosis was observed in 3 characters of internode length, pod length and grain number per pod. The characters exhibited positve heterobeltiosis were stem diameter, pod number per plant, grain unmber per pod and grain weight per plant. In F₂ generation, stem diameter, internode length, pod number per plant, grain unmber per pod, pod length and grain weight per plant exhibited positive heterosis, while 50 grain weight and grain number per plant showed negative heterosis. Positive heterobcltiosis were observed in stem diameter and internode length. Inbreeding depression was exhibited in 5 characters of stem diameter, pod number per plant, grain number per plant, 50-grain weight and grain weight per plant. The larger heterosis is, the greater depression is exhibited, especially in grain weight per plant, grain number per plant and pod number per plant. HeterobeItrosis exhibited by considerable number of crosses suggests possibility of breeding superior kidney bean varieties by fixation of epistasis portion of heterosis.