Apart from the relevant commercial implications, due to its position in the tree of life and the recent discovering of sexual chromosomes in its genome, Carica papaya is an excellent study model to answer a series of interesting questions related to the evolutionary history of flower plants. From this discovery, the researchers have already identified that its genome contains fewer genes than that of the Arabidopsis (a small annual herb), in spite of being three times bigger than it. According to the researcher from Granada, the lack of recent phenomenon of gene duplication, frequent in angiosperms genomes, can be behind of this observation. Despite this, it has been detected a significant increase in the number of genes related to arboreal development, the deposition and removal of starch reserves, the attraction of agents responsible for spreading the seeds and the adaptation to the length of the day in a tropical climate.
Other important crops
Experts predict that this new genome will offer numerous advantages as a reference system for comparative genomics with other fruit trees, and will be the basis to study morphological, physiological, medicinal and nutritional properties of other plants belonging to the order of the Brassicales, where papaya is included, which includes economically important crops such as cabbage, cauliflower, whitewash brush, mustard or turnip. Likewise, they expect papaya to be a reference organism for the study of the evolution of sexual chromosomes in plants.
Dr Navajas Prez, who at present is working on the sequencing of the determinant region of the sex in the sexual chromosomes of papaya and whose research career has been focused on different aspects of plants sexual determination, intends, in a near future, to implement a research work in the UGR directed to sex early diagnosis in vegetal species of economic interest for Andalusia, as well as for the study of other mole
|Contact: Rafael Navajas Prez|
Universidad de Granada