Identification of citrus polyploids using chromosome counts, morphological and SSR markers

Bilquees Fatima, Muhammad Usman, Muhammad Sarwar Khan*, Iqrar Ahmad Khan, Muhammad Mumtaz Khan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Polyploids play a key role in the improvement of citrus cultivars. Citrus breeding programs necessitate morphological, cytological and genetic characterization of cultivars. Here we analyze the polyploids using these three approaches. Cytological studies signify occurrence of spontaneous triploids (9.95%) and tetraploids (6.05%) in Kinnow mandarin and Succari sweet orange, respectively. Leaf characteristics were found directly proportional to the ploidy level; they change with an increase in the ploidy level. Genetic variability amongst morphologically distinct polyploids was confirmed using Simple Sequence Repeat (SSR) molecular markers. Accessions K 1, K 4, K 5 and K 7 of Kinnow, F 7 , F8 and F 10 of Feutrell’s Early, M 2 and M 4 of Mosambi, and S 1 and S 11 of Succari were found polymorphic, and are considered useful in current breeding programs in Pakistan. SSR loci genotyping, morphological selection and cytological screening of polyploids appeared to be an improved strategy for efficient screening and characterization of polyploids at seedling stage.

Original languageEnglish
Pages (from-to)107-114
Number of pages8
JournalPakistan Journal of Agricultural Sciences
Issue number1
Publication statusPublished - 2015


  • Aborted seeds
  • Genetics
  • Kinnow
  • Phenotype
  • Ploidy

ASJC Scopus subject areas

  • Food Science
  • Agronomy and Crop Science
  • Soil Science
  • Plant Science


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