BACKGROUND AND AIMS The taxonomical structure of the polymorphic subgenus Rosa section Caninae is highly complex due to the combination of some unusual features: the unique polyploid chromosomal constitution, the heterogamic canina meiosis, the ability to hybridize interspecifically, and the predominantly matroclinal inheritance. Although most taxonomists agree on the subdivision of the section...

Emeriti Week will again be celebrated during the second week of February, with the annual recognition by the Academic Senate set for Tuesday, February 13. This observance marks the 23rd anniversary of the founding of the Emeriti Association and the 19th annual Emeriti Week. The Academic Senate meeting on February 13 will be followed by the traditional Emeriti Association reception. However, bec...

Rose ( Rosa L.) is an economically important ornamental genus that has been cultivated for its scent the perfume industry since antiquity. However, most modern roses have lost their fragrance during later stages of breeding process. Here, 59 species , including 24 wild species, 20 Chinese old garden roses, and 15 were examined by headspace solid-phase microextraction gas chromatography–mass spe...