added metatadata + data for MSA dissection SD/LD

assays/MSA_dissection/protocols/dissection_of_MSAs.txt

+- per genotype: choose approx. 4 random plants every 6-8 days (SD) or every 2-10 days (LD)
+- start 5 days after emergence (DAE)
+
+- remove the leaves surrounding the main shoot apex (MSA) with a blade
+- image MSA with the stereo microscope Nikon SMZ18 with a Nikon DS-Fi2 camera
+- score developmental stage according to Waddington et al. (1983)
+- count spikelet meristems (include those that have developet into floret meristems or florets) on the MSA
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studies/MSA_dissection/README.md

+Scoring of the development according to:
+
+Waddington SR, Cartwright PM, Wall PC. A quantitative scale of spike initial and pistil development in barley and wheat. Ann Bot. 1983:51(1):119–130. https://doi.org/10.1093/oxfordjournals.aob.a086434
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studies/MSA_dissection/protocols/plant_material_growth_conditions.md

@@ -20,5 +20,5 @@ genotypes:
 
 
 **plants**
-- SD: sample names include "SD"
-- LD: sample names include "LD"
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+- SD: plant 1 - 204
+- LD: plant 205 - 342
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