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Table 2 Root Parameters for Which QTLs Were Detected

From: Rice Root Genetic Architecture: Meta-analysis from a Drought QTL Database

Trait name Symbol Nb populations Nb QTLs Reference of the studies in Table 1
Root number RN 6 41 1, 4, 8, 12, 14, 23, 24
Deep root number DRN 1 11 13
Lateral root number LRN 1 3 23
Penetrated root number PRN 4 25 1, 12, 14, 24
Seminal root length SRL 1 7 23
Maximum root length MRL 10 103 3, 4, 5, 6, 7, 9, 11, 13, 15, 18, 19, 20, 22
Lateral root length LRL 1 5 23
Penetrated root length PRL 2 7 1, 10, 21
Root thickness RTHK 7 123 2, 3, 4, 6, 7, 8, 9, 10, 11, 13, 19, 21
Penetrated root thickness PRTHK 3 37 1, 10, 21, 24
Root volume RVOL 2 18 4, 20
Root dry weight RDW 6 38 3, 4, 5, 8, 10, 18, 19, 21
Root dry weight in the 00–30 cm layer RW0030 1 5 2
Root dry weight in the 30–60 cm layer RW3060 1 3 2
Root dry weight in the 60–90 cm layer RW6090 1 2 2
Root fresh weight RFW 1 4 8
Penetrated root dry weight PRDW 1 7 10, 21
Deep root weight DRW 5 42 3, 6, 7, 9, 13, 19
Deep root ratio DRR 3 31 6, 7, 20
Root to total biomass ratio R/BIOM 1 16 9
Root to shoot ratio R/S 4 30 2, 8, 13, 18
Deep root to shoot ratio DR/S 2 7 3, 19
Root dry weight per tiller R/T 1 14 2
Deep root weight per tiller DR/T 5 22 2, 3, 6, 7, 19
Root branching index RBI 1 3 5
Root growth rate in depth RGRD 1 14 20
Root growth rate in volume RGRV 1 19 20
Root penetration index RPI 5 35 1, 10, 12, 14, 21, 24
Root pulling force RPF 1 12 10, 21
Total number of root QTLs    675