Institute of Fruit Tree and Tea Science, NARO (NIFTS) conducts basic and innovative research in fruit tree and tea science in order to respond to the needs of consumers, producers and people involved in related industries, and contributes to the advancement of fruit and tea production and the enrichment of dietary life in Japan.
The new very early maturing white peach cultivar "Himemaruko" with excellent taste
National Institute of Agricultural Organization (NARO) has developed a new white peach cultivar "Himemaruko", which ripens very early with excellent taste. This white peach cultivar is expected to be harvested about 9 days earlier than conventional cultivars by open field cultivation. The sales of nursery stocks of "Himemaruko" is scheduled to begin from the autumn of 2020 from a fruit nursery who has signed a license agreement with the Japan Fruit Seedling and Clonal Association. Read more
Succeeded in the whole genome sequencing of 「Shine Muscat」 grapes with high accuracy
Kazusa DNA Research Institute in collaboration with Institute of Fruit Tree and Tea Science, National Agriculture and Food Research Organization (NARO) carried out the whole-genome analysis of "Shine Muscat" grapes and its genome structure was compared with European wine grapes. Until now, genome sequencing of European wine grapes has been reported, but the whole genome sequence was not clarified for the interspecific hybrid table grapes. The sequence of 490.1Mb, which is 99.4% of the whole genome, was decoded. The research results were published online at BioRχiv on August 19th, 2019. Read more
Publication of Mikan Genome Database (MiGD)
National Agriculture and Food Research Organization (NARO) has developed and published a database "Mikan genome database (MiGD)" to support the development of DNA markers in citrus. This database enables the easy search for DNA polymorphism information necessary to develop DNA markers for about 10 species and cultivars of Citrus species and wild species in related genera. This database will be very useful to yield DNA markers for identifying important genes, marker assisted breeding and cultivar identification. Read more
Identification of genes that control polyembryony in citrus
A research group from Institute of Fruit and Tea Tree Science, NARO has identified the gene CitRKD1, which is involved in polyembryony regulation in citrus. They have also developed DNA marker that can easily distinguish the monoembryonic and polyembryonic alleles for about 95 citrus breeding varieties grown in Japan. Using this marker, the polyembryonic individuals can be efficiently removed at the seedling stage, therefore it is possible to efficiently promote the breeding of new varieties with superior characteristics without limiting the parent varieties used in the cross combination. Read more
Development of a technology to accelerate the breeding of seedless citrus
A technology to accelerate the breeding of seedless citrus has been developed. Male sterility, which is determined by the number of pollen grains per anther and apparent pollen fertility, is considered to be an important cause of seedlessness in progeny of Satsuma mandarin. Using crosses of Satsuma mandarin progeny, a DNA marker that can distinguish the number of pollen grains per anther and apparent pollen fertility has been identified. This DNA marker can be effectively used to select citrus plants with less amount pollen grains and low pollen ability even at the seedling stage. This result will contribute in understanding the molecular mechanism of male sterility in citrus and the breeding of seedless citrus cultivars. Read more.
The genome sequence of Satsuma mandarin was unveiled
The National Agriculture and Food Research Organization, in collaboration with the National Institute of Genetics, decoded the entire genome sequence of Satsuma mandarin (Miyagawa Wase). About 29,000 genes including 91 genes involved in coloring and fruit-setting of citrus fruits were deduced. The genome sequence information will facilitate for improving the efficiency in the citrus breeding program, productivity, and quality of citrus fruits.
Elucidating the relationship of compost application and freezing tolerance in Japanese pear
The cause of dead flower buds frequently observed in the Japanese pear cultivar 'Kosui' (Pyrus pyrifolia) grown under open field conditions in the southwestern regions of Japan was elucidated. During fall-winter months with relatively warm temperature, the freezing tolerance of flower buds showed insufficient freezing tolerance resulting in frost damage due to the coldness of winter. Application of fertilizer and compost in autumn and winter reduced the freezing tolerance and increased the number of dead flower buds. By changing the time of applying fertilizer and compost in the spring, it was revealed that the death rate of flower bud can be drastically reduced. Read more.
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