The Effect of Temperature and Daylength on Heading in Diploid Rhodesgrass Cultivars (Chloris gayana Kunth)
ISSN | 00213551 |
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NII recode ID (NCID) | AA0068709X |
The present study was conducted to clarify the effect of temperature and daylength on heading in diploid rhodesgrass cultivars. Three diploid cultivars, Tochiraku-kei, Fords-Katambora and Pioneer, were planted 9 times at 10-day intervals between April 24 (I) and July 14 (IX) in 1975. In 1976 the 3 cultivars were planted 3 times at 1-month intervals on May 4 (II), June 4 (V) and July 4 (VIII) under 5 daylength treatments of natural daylength (ND), 12 h daylength (12 h), 24 h daylength (24 h), 24 h/ND,and 24 h/12 h. DH (days to heading) decreased linearly with the increase in DMT (daily mean temperature) commonly in the 3 cultivars in 1975, suggesting that temperature is a major factor determining DH in diploid rhodesgrass. This relationship is described by a linear regression equation between DH and DMT in the period from sowing to heading date. From the results in 1976, a short daylength is considered to have an effect for accelerating flower initiation of diploid rhodesgrass under temperatures more than 22℃. These research findings would be useful in diploid rhodesgrass for estimating the first cutting time and/or seed harvesting time, and for conducting effective reproduction in greenhouses during winter.
Date of issued | |
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Creator | TARUMOTO Isao |
Subject |
days to heading flower initiation photoperiod sensitivity |
Publisher | Japan International Research Center for Agricultural Sciences |
Available Online | |
NII resource type vocabulary | Journal Article |
Volume | 39 |
Issue | 2 |
spage | 105 |
epage | 108 |
DOI | 10.6090/jarq.39.105 |
Rights | Japan International Research Center for Agricultural Sciences |
Language | eng |