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Comparison of Grain Filling Characteristics by Source-Sink Size Control in Glutinous and Non-glutinous Near Isogenic Line of Rice  

김춘송 (작물과학원 영남농업연구소)
안종국 (건국대학교 식량자원학)
정일민 (건국대학교 식량자원학)
강항원 (작물과학원 영남농업연구)
이재생 (작물과학원 영남농업연구)
고지연 (작물과학원 영남농업연구)
박성태 (작물과학원 영남농업연구소)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.49, no.3, 2004 , pp. 243-250 More about this Journal
Abstract
Two cultivars which are glutinous (Hawcheongchalbyeo) and non-glutinous (Hawcheongbyeo) near isogenic line of rice, were used for this study. The objective of this experiment was to gain the basic information for increasing grain yield of waxy rice by means of source and sink size control. In both Hwacheongbyeo and Hawcheongchalbyeo, the trend of decrease in total and average spikelet weight was ranked as follows; removal of penultimate leaf＜ removal of flag leaf＜ removal of flag leaf and 3ya leaf from the top ＜ removal of flag leaf and penultimate leaf ＜ removal of flag leaf, penultimate leaf, and 3rd leaf from the top. The reduction yale of total and average spikelet weight per panicle of Hwacheongbyeo was higher than those of Hwacheongchalbyeo according to the removal of flag leaf, penultimate leaf, and 3rd leaf from the top. In both cultivars, high-density grain ratio and grain filling ratio of the primary branches were higher Hun those of the secondary branches by leaf clipping treatment. The spikelet number and total spikelet weight per pinicle in both Hwacheongbyeo and Hwacheongchalbyeo were decreased by removal of spikelets on branches compared with control, whereas average spikelet weight and grain filling ratio were increased. The increase rate of average spikelet weight of Hwacheongchalbyeo was much higher than that of Hwacheongbyeo by sink size control. High-density grain ratio by removal of spikelets on branches was higher in Hwacheongchalbyeo, but filled grain ratio was higher in Hwacheongbyeo.
Keywords
glutinous rice; source and sink size control; leaf clipping; removal of spikelets on the branch; total spikelet weight; average spikelet weight; high-density grain; grane filing ratio;
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