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Kasetsart University (KU) Sesame Breeding Project had been developed sesame lines with high seed retention after the capsules are dry in 2003. These sesame lines are divided into two types: (1) The capsules open at the tip when they are dry, but the seed remained in the capsules more than 70% after the capsules are inverted. This capsule type is called shatter resistance (Langham,1996) and (2) The capsules are closed when they are dry, it is called non ? shattering (Wongyai and Chowchong, 2003a). Both shatter resistance and non ? shattering are easily threshing by rice or soybean thresher machine. Seeds do not damage by machine. The improved non ? shattering is not controlled by recessive indehiscent gene (id). The original indehiscent plant was reported by D.G. Langham (1946) and the capsules of the id/id indehiscent plant proved too difficult to thresh (Ashri, 1998). However, the further research on inheritance of shatter resistance and non ? shattering in sesame are needed for understanding.
In April 2004 the two superior non ? shattering lines with white seed color have been released namely C plus 1 and C plus 2. These two lines were developed from the cross KUds6111/Sesaco 20. KUds6111 is delayed shattering which it was developed by KU Sesame Breeding Project. Sesaco 20 is shatter resistance which it was developed by Sesaco Corporation, San Antonio, Texas, USA (Wongyai and Chowchong, 2003b).
The shattering in sesame remains the problem of sesame production in the world. Seed loss may reduced yield by 60% (Boyle and Oemcke, 1995) Sesame could not grow in a large area and it could not mechanically harvest. In Thailand sesame production areas are reduced year by year. It is due to seed shattering and it is costly at harvest and manual labor is becoming scarce. The new varieties of non ? shattering would be potential for increasing seed yield per unit area and the mechanical production system would accept by grower as the major crops such as rice and maize. KU18, the black seed sesame variety was developed by KU Sesame Breeding Project in 1992.
KU18 is unique quality for taste and flavor for edible seed (Takada and Uno, 2001). In addition the local varieties of Thailand namely Loie, Mae Hongson , Kok Samrong and Saraburi are higher lignans content (Katsuta et al., 2001). Thus, the shatter resistance and non ? shattering lines have been employed for KU Sesane Breeding Project. There are three programs as follow: 1) To develop high yielding cultivar, 2) To improve black seed sesame with good taste and flavor and 3) To develop high seed retention with high lignans content.
The crosses of these three breeding programs were made in 2002. The selected F₄ and F? lines of these breeding programs will be tested for their yielding ability and will evaluate for seed quality and lignans content.

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영어 초록
Introduction
Sesame Production in Thailand
Shattering characteristics in sesame
Non - shattering lines of KU Ssesame Breeding Project
Potential use of non - shattering in breeding and yield improvement in Thailand
Acknowledgement
References

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UCI(KEPA) : I410-ECN-0101-2009-594-017428908