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KMID : 0613820110210060901
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Journal of Life Science
2011 Volume.21 No. 6 p.901 ~ p.906
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Variations of Seed Hardness in Local Populations of Pisum sativum
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Kim Chang-ho
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Abstract
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In order to investigate the variations on the seed hardness of Pisum sativum distributed in southern area of Korean peninsula, 10 local strains (Choonseong. Ganghwa, Pocheon, Hadong, Haman, Geumneung, Yeongyang, Boseong, Gochang, Namweon), which located from 34o26”N to 38o11”N, were selected according to their latitudes and geographical distances. The seeds of these strains were collected and their contents of mannose and galactose were analyzed. Mannose contents in the seeds were variable in the range between the highest 10.351 ㎎/g (Ganghwa) and the lowest 5.962 ㎎/g (Yeongyang). The contents of galactose were also represented remarkable differences from 7.050 ㎎/g (Yeongyang) to 19.314 ㎎/g (Hadong). The local strains were classified into 3 variation types such as the south central type (Namweon, Yeongyang, Geumneung, Gochang), the central type (Choonseong. Ganghwa, Pocheon) and the southern type (Haman, Hadong) and 1 strange strains (Boseong) according to the geographical climatic type, isopleth of warmth index and the ratio of mannose to galactose, which indicate the hardness of seeds in Leguminosae, ranged from 0.46 to 0.94. The variation types are very significant genecologically as an evidence for microevolution related to natual and artificial selection in cultivated plants.
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KEYWORD
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Galactose, mannose, microevolution, Pisum sativum, variation types
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