Cryptic structural differences at the interstrain level of Pisum sativum L.
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概要
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Karyotype analysis of 11 strains of Pisum sativum L. shows gross uniformity in morphology. Somatic chromosome number, 2n=14, is constant for all the strains. Chromosomes are long to medium in length. Primary constrictions range from median to submedian. Secondary constrictions are present in 1 to 3 pairs of chromosomes. Each strain is characterised by its own karyotype, which may serve as an identifying criterion. Absoute chromosome length does not show marked variation, whereas absolute chromosome volume reveals a wide difference. Meiotic analysis discloses regular seven bivalents with a low frequency of irregularities. Karyotype data have revealed the importance of structural alterations in the evolution of different strains. Meiotic behaviour does not reveal any distinct manifestation of structural hybridity in these strains which has been suggested as due to the attainment of homozygosity for structural alterations through selection.
- 財団法人 日本メンデル協会の論文
財団法人 日本メンデル協会 | 論文
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