Table 4 Phenotypic correlations for the 8 selected root traits among the 17 rice accessions under two water conditions

FRL₂₀

–

0.044^ns

− 0.095^ns

0.361^ns

0.186^ns

− 0.371^ns

0.293^ns

0.534^a

TRL₄₀

0.452^ns

–

0.828^b

−0.585^b

0.775^b

−0.142^ns

− 0.536^a

0.761^b

TRL₆₀

0.267^ns

0.801^b

–

−0.597^b

0.852^b

0.236^ns

− 0.712^b

0.730^b

BI₄₀

0.485^a

−0.057^ns

− 0.339^ns

–

− 0.347^ns

− 0.229^ns

0.217^ns

− 0.217^ns

DIAM _ TR₆₀

0.580^a

0.601^a

0.642^b

0.259^ns

–

0.113^ns

− 0.742^b

0.760^b

\( {\upalpha}_{FR{L}_{40\_60}} \)

−0.489^a

−0.192^ns

0.163^ns

− 0.499^a

0.130^ns

–

− 0.380^ns

− 0.171^ns

\( {RED}_{T{R}_{20_{60}}} \)

− 0.440^ns

− 0.183^ns

− 0.218^ns

− 0.358^ns

− 0.791^b

−0.131^ns

–

− 0.364^ns

TOT_VOL

0.625^b

0.923^b

0.715^b

0.009^ns

0.528^a

−0.298^ns

− 0.118^ns

–