overtime sink and source relationship in sweetpotato


Continuous storage root formation and bulking (CSRFAB) in sweetpotato is an economically important trait and are of high value to small-scale farming systems. This is because it allows them to harvest few storage roots each time over a long season and its appropriateness for domestic use should therefore be exploited for increased home food security. In addition, small scale farmers gradually sell sweetpotato to obtain small daily family needs like salt, soap, oil, school material for children, thus contributing to sustainable household income, especially for women as they are totally accounted for in their respective families. Early and determinate storage root formation and bulking (EDSRFAB) and Early and indeterminate storage root formation and bulking (EISRFAB) in sweetpotato breeding are needed traits for sweetpotato production in developing countries to increase yield performance and improve food security status. The advantages of growing EDSRFAB include high benefit from early marketing with a good price, adaptation to multiple cropping systems by shortening the growing period of sweetpotatoes from 5-6 to 3-4 months, high yielding capacity through early harvesting to avoid infestation of pest and disease, and proper way of solving food and feed problems. EISRFAB varieties imply high yielding potential as they capture more solar energy, water, and nutrients over long periods than purely EDSRFAB sweetpotatoes.


Leaf Photosynthesis MultispeQ V1.0


Measures many photosynthesis-related parameters in <15 seconds, including:

  • Chlorophll Fluorescence: Phi2, PhiNPQ, PhiNO, NPQt, qL, LEF
  • Relative Chlorophyll: SPAD
  • Proton Motive Force: ECSt, vH+, gH+
  • Absorbance at: 450, 535, 605, 650, 730, 850, 880, and 940nm.
  • Leaf Thickness (in mm), angle, and cardinal direct...


  1. (Multiple Choice)



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