Survey of Diploid in Butterbur (Petasites japonicus Maxim.) and Production of Hybrid Plants for Harvesting Spikes by Crossing

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  • フキ栽培種における2倍体の検索と花穂収穫用交雑実生の作出
  • 育種・遺伝資源 フキ栽培種における2倍体の検索と花穂収穫用交雑実生の作出
  • イクシュ イデンシゲン フキ サイバイシュ ニ オケル 2バイタイ ノ ケンサク ト カスイ シュウカクヨウ コウザツ ミショウ ノ サクシュツ

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Abstract

Butterbur is an important vegetable in Japan. In this paper, we present the results of surveying for diploids among cultivated butterbur and production of hybrid plants for harvesting spikes by crossing. It was possible to estimate ploidy level by flow cytometry in butterbur cultivars. ‘Mizubuki’ (Gunma), ‘Yatsugashira’ and ‘Line 4’ were diploid, and ‘Mizubuki’ (Tokushima) and ‘Kibiji’ were triploid. Pollen fertility of male plants of ‘Mizubuki’ (Gunma), ‘Yatsugashira’ and ‘Line 4’ were more than 90% and female plants of ‘Mizubuki’ (Gunma) were fertile. As a results hybrid plants from ‘Mizubuki’ (Gunma) × ‘Yatsugashira’ and ‘Mizubuki’ (Gunma) × ‘Line 4’ were obtained. Average spike yield of hybrid plants from ‘Mizubuki’ (Gunma) × ‘Yatsugashira’ were heavier than that of ‘Mizubuki’ (Gunma). There were several hybrid plants that produced many spikes of these hybrid plants, and developed less anthocyanin pigments at the bracts. Therefore, there is a possibility of selecting a new cultivar for harvesting spikes from hybrid plants of ‘Mizubuki’ (Gunma) × ‘Yatsugashira’.<br>

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