PLoS ONE (Jan 2018)

Development and characterization of penta-flowering and triple-flowering genotypes in garden pea (Pisum sativum L. var. hortense).

  • Jyoti Devi,
  • Gyan P Mishra,
  • Satish K Sanwal,
  • Rakesh K Dubey,
  • Prabhakar M Singh,
  • Bijendra Singh

DOI
https://doi.org/10.1371/journal.pone.0201235
Journal volume & issue
Vol. 13, no. 7
p. e0201235

Abstract

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This study reports the development of a garden pea genotype 'VRPM-901-5' producing five flowers per peduncle at multiple flowering nodes, by using single plant selection approach from a cross 'VL-8 × PC-531'. In addition, five other stable genetic stocks, namely VRPM-501, VRPM-502, VRPM-503, VRPM-901-3 and VRPSeL-1 producing three flowers per peduncle at multiple flowering nodes were also developed. All these unique genotypes were of either mid- or late- maturity groups. Furthermore, these multi-flowering genotypes were identified during later generations (F4 onward), which might be because of fixation of certain QTLs or recessive gene combinations. Surprisingly, a common parent PC-531, imparting multi-flowering trait in ten cross combinations was identified. Thus, the genotype PC-531 seems to harbor some recessive gene(s) or QTLs that in certain combination(s) express the multi-flowering trait. The interaction between genotype and environment showed that temperature (11-20°C) plays a key role in expression of the multi-flowering trait besides genetic background. Furthermore, the possible relationship between various multi-flowering regulatory genes such as FN, FNA, NEPTUNE, SN, DNE, HR and environmental factors was also explored, and a comprehensive model explaining the multi-flowering trait in garden pea is proposed.