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Agronomic Performance in Low Phytic Acid Field Peas.

Donna L Lindsay¹, Ambuj B Jha¹, Gene Arganosa¹

¹Crop Development Centre, Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK S7N 5A8, Canada.

Plants (Basel, Switzerland)

|August 28, 2021

Summary

Low phytic acid (lpa) field pea lines were developed to improve iron absorption. Breeding efforts successfully restored agronomic performance, demonstrating enhanced iron bioavailability in these improved pea varieties.

Keywords:

field pea iron bioavailability low phytic acid

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Area of Science:

Agricultural Science
Plant Breeding
Nutritional Science

Background:

Field peas are rich in protein, fiber, and iron, but phytic acid reduces iron bioavailability.
Naturally occurring phytic acid in peas binds iron, hindering its absorption during digestion.
Previous low phytic acid (lpa) pea lines exhibited reduced yield and seed weight.

Purpose of the Study:

To develop and evaluate new low phytic acid (lpa) field pea breeding lines.
To assess the agronomic performance and iron bioavailability of these improved lpa pea lines.
To determine if plant breeding can overcome the yield and seed weight deficits in lpa peas.

Main Methods:

Crossing existing lpa pea lines with their progenitor cultivars.
Conducting 10 replicated field trials to evaluate agronomic performance (yield, seed weight).
Analyzing phytic acid concentration and iron bioavailability using Caco-2 cell culture assays.

Main Results:

17 out of 19 lpa lines achieved over 95% of the check mean for yield.
16 out of 19 lpa lines exceeded 98% of the check mean for 1000-seed weight.
14 lpa lines demonstrated 11-55% greater iron bioavailability compared to controls, with 27-55% lower phytic acid.

Conclusions:

A single generation of plant breeding successfully improved low phytic acid (lpa) pea lines.
The developed lpa pea lines exhibit comparable agronomic performance to conventional cultivars.
These findings highlight the potential for enhanced nutritional value, specifically iron bioavailability, in field peas through targeted breeding.