We know that rice is a short day plant. During summer the photoperiod is about 12 hours and in winter its less than that. As rice is a short day plant and my variety is photo sensitive then will the flowering in summer will be delayed? Please help.
The combination of short day regukation and genotype may laed to an early flowering. Refernces for mechanism are in PP http://www.ncbi.nlm.nih.gov/pmc/articles/PMC514104/, The dealy under LD is a related trait http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0075959
No, some strong photosensitive varieties show early flowering in short day condition (like cv. Nona Bokra from india). But in general, it is said that rice of the tropics have long basic vegetative growth and show late flowering in short day condition (in low latitudes).
the local cultivar of rice in Iraq is a short day plant and it usually flower as the days shorten. toward the end of the summer.
I suspect that SD response is cv dependent, but on Zuiho SD appears only at 30°C but not at lower or higher temperatures. If this is true the field response will be appearing when daylenght is less than 10 h and temperature 30°C. Ref in https://www.jstage.jst.go.jp/article/jcs1927/52/2/52_2_135/_article
Dear Dr Darshan Panda,
Greetings, I would like to thank you for your interesting question. Yes rice is short day and sensitive to light. In Egypt we get some genotypes have a short period and could not flower under our conditions.
Also, the rice has 2 stages i.e., vegetative and reproductive stage. This takes 4-6 months and their is different types early mature 120 days, medium 140-160 and late genotypes 6 months.
for that you could find different categories. So, you must try under field conditions if flower it ok, if not you must try under controlled green house.
with best regards
Khaled
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