Exploitation of induced 2n-gametes for plant breeding

Adnan Younis, Yoon Jung Hwang, Ki Byung Lim

Research output: Contribution to journalReview articlepeer-review

74 Scopus citations

Abstract

Key Message: Efficient induction of unreduced gamete in different crops and its genetic consequences will open new avenues for plant breeding. Unreduced gamete formation derived via abnormal meiotic cell division is an important approach to polyploidy breeding. This process is considered the main driving force in spontaneous polyploids formation in nature, but the potential application of these gametes to plant breeding has not been fully exploited. An effective mechanism for their artificial induction is needed to attain greater genetic variation and enable efficient use of unreduced gametes in breeding programs. Different approaches have been employed for 2n-pollen production including interspecific hybridization, manipulation of environmental factors and treatment with nitrous oxide, trifluralin, colchicine, oryzalin and other chemicals. These chemicals can act as a stimulus to produce viable 2n pollen; however, their exact mode of action, optimum concentration and developmental stages are still not known. Identification of efficient methods of inducing 2n-gamete formation will help increase pollen germination of sterile interspecific hybrids for inter-genomic recombination and introgression breeding to develop new polyploid cultivars and increase heterozygosity among plant populations. Additionally, the application of genomic tools and identification and isolation of genes and mechanisms involved in the induction of 2n-gamete will enable increased exploitation in different plant species, which will open new avenues for plant breeding.

Original languageEnglish
Pages (from-to)215-223
Number of pages9
JournalPlant Cell Reports
Volume33
Issue number2
DOIs
StatePublished - Feb 2014

Keywords

  • Colchicine
  • FDR
  • Gene isolation
  • Nitrous oxide
  • Polyploidy
  • SDR

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