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RISS 인기검색어
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- 저자 : Young Bourn Shin(辛英範) (검색결과 1 건)
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Young Bourn Shin(辛英範),Kyung Min Yoon(尹景民) 한국육종학회 1986 한국육종학회지 Vol.18 No.4
The morphological characteristics and chromosomal behaviour at meiosis were examined for the trisomics of the rice plants, which derived from the crosses between triploids and diploids of the cultivar, Gwanchul. The trisomic plants, having chromosome number of 2n=25 were classified into 8 groups on the basis of their morphological traits. The major morphological traits, vigorousity, growth habit, plant height, leaf color, panicle shape, spikelet size and percent seed setting. were significantly different each other among 8 trisomic groups. Among these morphological traits, the spikelet character, such as spikelet length and width, and their ratio of length / width, were considered to be useful criteria for the classification of trisomic types at maturity. Eight types of the trisomics could be classified into 3 groups according to chromosomal pairing configuration at first division of meiotic phrophase. Three trisomic types out of 8 trisomics showed higher frequency of trivalent pairing than that of univalent formation, and the other 3 trisomic types showed higher frequency of univalent formation than trivalent pairing. The remaining two trisomic types, among 8 trisomic groups, were observed as about same ratio in the univalent and trivalent formation.
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