Difference between revisions of "IC4R006-Phenomics-2015-26104576"

Revision as of 16:59, 28 July 2016

Field phenomics for response of a rice diversity panel to tenenvironments in Senegal and Madagascar. 1. Plant phenological traits

The GRiSP Global Rice Phenotyping Network seeks to assemble a multi-environment, multi-trait phe-nomics resource for rice (Oryza sativa L.) diversity panels in order to understand existing genetic diversityand identify genes/alleles conveying adaptation and yield potential. Phenology is central to plant adap-tation and productivity in different agro-ecologies.

The population taken from the ORYTAGE species-wide (O.sativa L.) diversity panel of Cirad (http://ricephenonetwork.irri.org/diversity-panels/orytage-diversity-panels) which is also aresource for the GRiSP Global Rice Phenotyping Network (http://ricephenonetwork.irri.org). For the present study, a sub-sample of189 indica accessions was grown, augmented for comparative pur-poses with 20 genotypes representing other genetic groups (3 aus,3 temperate japonica, 12 tropical japonica, and 2 aromatic acces-sions). The indica population covered improved and traditionalvarieties from all tropical regions but had large sub-populationsfrom Madagascar (34) and W-Africa (44, thereof 30 improved linesfrom AfricaRice bred in Senegal) to capture adaptations to theclimatic constraints at the experimental sites. Twenty improvedvarieties and lines were from IRRI (Philippines). A complete list ofaccessions’ geographic origin and seed sources is presented in TableS1.

The environmentsThe six sowing dates in Senegal subjected the crop to very differ-ent weather and day length conditions (Fig. 1). Weather variablesare presented in Fig. 1A as averages for the initial 80 d of the cropas a rough measure of conditions during pre-floral developmentstages. The first three sowing dates were associated with low min-imum air humidity (RHmin) averaging less than 30%, while meanminimum meanminimum temperature increased from 16.4 (February crop) to 19.0(April crop)℃. Mean and maximal temperatures increased at a sim-ilar rate, with a constant mean diurnal temperature amplitude ofabout 15℃.

Cirad, Umr AGAP (Dept. BIOS) and Upr AIDA (Dept. ES), F-34398, Montpellier, France
IRRI, CESD Division, DAPO Box 7777, Metro Manila, Philippines
Africa Rice Center, Sahel Station, P.B. 96, St. Louis, Senegal
Université d’Antananarivo, Département de Biologie et Ecologie Végétales, BP 906, Antananarivo 101, Madagascar
SRR FOFIFA, BP 230, Antsirabe 110, Madagascara

@@ Line 9: / Line 9: @@
 ==Research Findings==
+* The environmentsThe six sowing dates in Senegal subjected the crop to very differ-ent weather and day length conditions (Fig. 1). Weather variablesare presented in Fig. 1A as averages for the initial 80 d of the cropas a rough measure of conditions during pre-floral developmentstages. The first three sowing dates were associated with low min-imum air humidity (RHmin) averaging less than 30%, while meanminimum meanminimum temperature increased from 16.4 (February crop) to 19.0(April crop)℃. Mean and maximal temperatures increased at a sim-ilar rate, with a constant mean diurnal temperature amplitude ofabout 15℃.
 ==Labs working on this Project==