Bulb onion ( Allium cepa L.) is an economically valuable vegetable crop in the United States. Onion production threatened by thrips, which are vector for Iris yellow spot virus , causal agent of (IYS). New Mexico State University (NMSU) breeding lines 12-236, 12-238, 12-243, and 12-337 have exhibited fewer IYS disease symptoms field; however, little known about effects on photosynthesis rate (P...
