Intergenomic recombination in F1 lily hybrids (Lilium) and its significance for genetic variation in the BC1 progenies as revealed by GISH and FISH

R. Barba Gonzalez, M.S. Ramanna, R.G.F. Visser, J.M. van Tuyl

Research output: Contribution to journalArticleAcademicpeer-review

53 Citations (Scopus)

Abstract

Intergenomic recombination was assessed in a BC1 population of Oriental (O) × Asiatic (A) lilies (Lilium) backcrossed to Asiatic parents. This population consisted of 38 plants generated from the 2n gametes from 2 genotypes (951502-1 and 952400-1) of the diploid F1, Oriental × Asiatic lilies (2n = 2x = 24) as parents. In the majority of BC1 plants, there was evidence that first division restitution, with and without crossovers, resulted in functional gametes. However, there were 5 BC1 plants in which 2n gametes originated from indeterminate meiotic restitution (IMR). Based on the number of recombinant chromosomes for a particular homoeologous pair, 3 types of plants were identified: (i) those with both the reciprocal product of a crossover (O/A, A/O, where O represents the centromere of the O genome and A the recombinant segment of Asiatic chromosome, and vice versa); (ii) those with 1 normal chromosome of the O genome and a recombinant chromosome (O, A/O); and (iii) those with 1 normal chromosome of the A genome and a recombinant chromosome (A, O/A). An important feature of A × OA backcross progeny is the occurrence of substitutions for the segment distal in the crossover wherever the recombinant chromosome O/A was present. In the case of IMR, the substitution occurred for both proximal and distal recombinant segments. The significance of these substitutions is that they offer the potential for the phenotypic expression of recessive genes in polyploids (i.e., nulliplex genotype)
Original languageEnglish
Pages (from-to)884-894
JournalGenome
Volume48
Issue number5
DOIs
Publication statusPublished - 2005

Keywords

  • bc2 progenies
  • crosses
  • pollination
  • relevance
  • culture
  • probe
  • pcr

Fingerprint Dive into the research topics of 'Intergenomic recombination in F1 lily hybrids (Lilium) and its significance for genetic variation in the BC1 progenies as revealed by GISH and FISH'. Together they form a unique fingerprint.

Cite this