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Credit: Forestry and Forest Products Research Institute, Japan
Cryptomeria japonica, or the Japanese cedar, is highly revered as the national tree of Japan. Locally known as sugi, it covers over 4.5 million hectares of land, accounting for nearly half of Japan s artificial forests. However, it is also notorious for causing hay fever, with a good 26.5% of Japan s population reporting cedar pollen allergies in 2008. Over the past years, pollen allergy caused by this conifer has become a widespread social issue among Japanese residents, with many having to avoid going outdoors during pollen season.
As sterile trees cannot produce and release functional pollen, it is believed that breeding of male-sterile cedar trees could be crucial in reducing the pollen released into the environment. However, their frequency is drastically low, with only two male-sterile trees per 8700 trees in a forest! The rarity of these trees, combined with the large and repetitive genom ....

Saneyoshi Ueno , Fu Jin Wei , Yoshinari Moriguchi , Ryoichi Hasegawa , Forest Products Research Institute , Niigata University , Tree Genetic Lab In Forestry , Tree Genetic Lab , Plant Sciences , Pollution Remediation , Ecology Environment , Molecular Biology , ஃபூ ஜின் வெய் , யோச்சி ஹாசேகவ , காடு ப்ராடக்ட்ஸ் ஆராய்ச்சி நிறுவனம் , நீகாட பல்கலைக்கழகம் , மரம் ஜெநெடிக் ஆய்வகம் இல் வனவியல் , மரம் ஜெநெடிக் ஆய்வகம் , ஆலை அறிவியல் , பொல்யூஶந் பரிகாரம் , சூழலியல் சூழல் , மூலக்கூறு உயிரியல் ,