肥沃度センシング技術と養分欠乏耐性系統の開発を統合したアフリカ稲作における養分利用効率の飛躍的向上

共同研究打ち合わせ及び現地圃場視察(課題2)

2020.05.29

共同研究打ち合わせ及び現地圃場視察(課題2)

SATREPSマダガスカルプロ課題2「養分の吸収利用に優れた育種素材の開発」に参画するマティアス主任研究員が、共同研究打ち合わせと現地圃場視察のため、2月下旬から3月初旬にかけてマダガスカルに出張しました。以下、成果の概要になります。

 In Madagascar I visited all our field sites to evaluate progress in ongoing experiments and to develop a detailed protocol for harvesting and sample processing. Ongoing experiments include the yield trials of our lowland and upland breeding lines, two F4 breeding line populations and evaluations of tolerance to iron toxicity and of grain Zn concentration. In addition, we had a field and lab/greenhouse demonstration for the JIRCAS auditors visiting Madagascar.

Fields at Anjiro (top left), Behenji (top right) and Antohobe (bottom), with +NPK plots on the left and 0-input plots on the right.

Farmers give comments on their varietal preferences in our PVS trials at Behenji. At this stage the most important criterion appears to be the size of individual panicles.

Upland field site at Ankazo with genotypic differences in seedling vigor (left) and sampling and root counting procedures (middle and right).

Difference in biomass accumulation between 6 rice genotypes on a Fe toxic and O deficient soil (top) and differences in the extent of leaf bronzing symptoms (bottom).