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SlAGL6 Gene is Key to Parthenocarpy in Tomato
Posted by: Prof. Dr. M. Raupp (IP Logged)
Date: May 16, 2018 08:28PM

Parthenocarpy is a desired trait in tomato since it can overcome problems with fruit setting under unfavorable conditions. A parthenocarpic tomato cultivar, ??MPK-1', with a parthenocarpic gene, Pat-k, exhibits stable parthenocarpy, thus, producing few seeds and are propagated inefficiently via cuttings. The team of Rihito Takisawa from Kyoto University in Japan isolated the Pat-k gene to study its relationship with parthenocarpy and low seed set.
Results showed that Pat-k is located in the 529 kb interval between two markers, where 60 genes exist. The team also found that the SlAGAMOUS-LIKE 6 (SlAGL6) gene of ??MPK-1' was mutated. This resulted in lowered transcript levels of SlAGL6 in ovaries of ??MPK-1' than a non-parthenocarpic cultivar.
From these results, the team concluded that Pat-k is SlAGL6, and its downregulation in ??MPK-1' causes parthenocarpy and low seed set. Moreover, down-regulation of Pat-k/SlAGL6 could cause abnormal ovule formation, leading to a reduction in the number of seeds.


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