Breeding and Extension of the New Strawberry Cultivar ‘Kaorino’ with Extremely Early Flowering and Resistance to Anthracnose

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  • 極早生性を有するイチゴ炭疽病抵抗性品種‘かおり野’の育成と普及
  • ゴク ワセセイ オ ユウスル イチゴタンソビョウ テイコウセイ ヒンシュ'カ オリノ'ノ イクセイ ト フキュウ

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Abstract

A new strawberry cultivar, ‘Kaorino’, has several attractive traits such as resistance to anthracnose, one of the most serious diseases of strawberry, extremely early flowering, and a high sugar content. This cultivar was bred for forcing culture at Mie Prefecture Agricultural Research Institute and registered as a new variety in 2010. ‘Kaorino’ breeding was started in 1990 by diallel crosses between ‘Nyoho’, ‘Aiberry’, ‘Toyonoka’, and ‘Hokowase’. We continued to select and cross the lines for 9 generations by adding ‘Akihime’, ‘Akasyanomituko’, ‘Tochiotome’, and ‘Sanchi-go’ as parents, and many strawberry lines with anthracnose resistance were developed. ‘Kaorino’ was a cultivar selected from a hybrid line between line ‘0028401’ and line ‘0023001’ in 2003. ‘Kaorino’ shows high-level anthracnose resistance equal to ‘Hokowase’ and ‘Sanchi-go’. Flower initiation is earlier than in ‘Akihime’, which is a representative early ripening cultivar under natural conditions in Japan, harvesting can be started in late November, and the yield until March is higher than in ‘Akihime’ and ‘Sanchi-go’ under forcing culture. The eating quality is superior: the fruit has a special, refined aroma, contains highly soluble solids, and shows low acidity. The conic fruit is large, with an orange-red skin color and white flesh and core. The cultivar distribution has been promoted by a project comprising administration, research, extension, and grower groups in Mie Pprefecture. A license system was established for growers both inside and outside of Mie Prefecture to promote ‘Kaorino’ cultivation. Cultivation guidance for ‘Kaorino’ has been disseminated, resulting in an increase in ‘Kaorino’ growers both inside and outside of Mie Prefecture.

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