Breeding and Seasonal Adaptability of High-female F1 Hybrid Bitter Melon (Momordica charantia L.) 'Kumaken BP1' Using Gynoecious Inbred Line for the Seed Parent

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  • 雌性型内婚系統を種子親とした多雌花性ニガウリ（Ｍｏｍｏｒｄｉｃａ　ｃｈａｒａｎｔｉａ　Ｌ．）‘熊研ＢＰ１号’の育成と作型適応性
  • シセイガタ ナイコンケイトウ オ シュシ オヤ ト シタ タシカセイ ニガウリ Momordica charantia L クマケン BP1ゴウ ノ イクセイ ト サクガタ テキオウセイ

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A new F1 hybrid bitter melon (Momordica charantia L.) named ‘Kumaken BP1’ has been bred using a gynoecious inbred line for the seed parent. ‘Kumaken BP1’ belongs to an Ao-chunaga (green semi-long) type of bitter melon. Seasonal adaptability of ‘Kumaken BP1’ in early-spring, spring and autumn was investigated. ‘Kumaken BP1’ showed characteristics of high female flower formation in those three seasons and especially its percentage of female flower nodes in late autumn cultivation was highly maintained while that of ‘Erabu’ decreased. Yields of ‘Kumaken BP1’ slightly increased in early-spring and spring, and increased by 50% in autumn as compared with ‘Erabu’. Therefore, in bitter melon breeding, F1 hybrids using gynoecious inbred lines for the seed parents are clearly advantageous. In the young stage, ‘Kumaken BP1’ needs a pollinizer to set fruits because the plant has few male flowers.<br>

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