Abstract
Chilling temperatures (<10°C) may cause damages in cucumber plants (Cucumis sativus L.) during winter and early spring seasons. Inheritance of chilling injury in U.S. processing cucumber is controlled by cytoplasmic (maternally) and nuclear factors. To understand inheritance of chilling injury in Korean market-type cucumber, reciprocal crosses between chilling tolerant (CT1) and susceptible (CT4) lines produced F1 (CT1×CT4) and F1 (CT4×CT1) progenies. Reciprocal F2 (CT1×CT4) and F2 (CT4×CT1) populations were subsequently derived. Seedlings in the first true leaf stage were subjected to 4°C for 8h (08:00 to 16:00) and damage level was assessed visually using 1 (no damage) to 5 (severe damage) rating scale. Means of damage rating for reciprocal F1 (CT1×CT4) and F1 (CT4×CT1) progenies were 1.1 and 1.1, respectively. This indicates that tolerance for chilling stress at 4°C in this germplasm is dominant. However, means of damage for F2 (CT1×CT4) progenies and F2 (CT4×CT1) progenies were 3.2 and 1.2, respectively. These data indicate that genetic control of chilling injury in these progenies is paternal. Based on the data, we hypothesize that line CT1 possesses a dominant nuclear factor that conditions chilling tolerance in both reciprocal F1s and a paternal factor(s) that lead chilling tolerance only in F2 (CT4×CT1). These putative nuclear and paternal genetic factors are designated as Ch-1 and Ch-p, respectively.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
