Cytogenetic Analysis of Induced Translocation Heterozygote in <i>Trachyspermum ammi</i> (L.) Sprague

• Kumar Girjesh

  Plant Genetics Laboratory, Department of Botany, University of Allahabad

• Dwivedi Harshita

  Plant Genetics Laboratory, Department of Botany, University of Allahabad

抄録

Numerous naturally occurring mutations are heterozygous, and thus, a contributing source of variation. Their crucial fate rests on the gametic fertility and viability. Translocations have been reported in many plant species; however, no previous report is available in this regard in Trachyspermum ammi (L.) Sprague (ajwain). During meiotic analysis, a heterozygote for reciprocal translocation has been isolated from the population through EMS treated set in ajwain var. AA-1. The results of the cytological studies showed the predominance of ring quadrivalents along with seven bivalents. Some extent of univalents and bivalents with multiple chromosomal associations along with rings and chains were also observed at metaphase I. Heterozygous plant showed reduced pollen fertility up to 36.23% due to the predominance of adjacent orientation over alternate. At anaphase I, some pollen mother cells (PMCs) showed normal 9 : 9 separation but simultaneously, abnormal 8 : 10 chromosomal separation was also observed. This study deals with the cytological behavior of heterozygote and its occurrence and consequences in the present crop.

収録刊行物

• ＣＹＴＯＬＯＧＩＡ

  ＣＹＴＯＬＯＧＩＡ 80 (3), 303-309, 2015

  公益財団法人 日本メンデル協会

キーワード

• <i>Trachyspermum ammi</i> (L.) Sprague (ajwain)
• Heterozygote
• Ring
• Chain
• Quadrivalent
• Pollen fertility

詳細情報

• CRID: 1390001204109668992
• NII論文ID: 130005100895
• DOI: 10.1508/cytologia.80.303
• ISSN: 13487019
• ISSN: 00114545
• Web Site: https://www.jstage.jst.go.jp/article/cytologia/80/3/80_303/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可