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

PLoS One. 2018 Jul 30;13(7):e0201235. doi: 10.1371/journal.pone.0201235. eCollection 2018.

Abstract

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Flowers / genetics*
  • Genes, Recessive*
  • Genotype*
  • Models, Genetic*
  • Pisum sativum / genetics*
  • Plant Proteins / genetics
  • Quantitative Trait, Heritable*

Substances

  • Plant Proteins

Grants and funding

The authors are thankful to the Indian Council of Agricultural Research (ICAR), New Delhi, India for the financial support under the in-house project on “Genetic Improvement of Legumes”. The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.