Molecular Dissection of Seedling Salinity Tolerance in Rice (Oryza sativa L.) Using a High-Density GBS-Based SNP Linkage Map

Rice

Table 1 Phenotypic response of parents and F₆ RIL population for traits related to salt tolerance at seedling stage

Trait Name	Bengal Mean	Pokkali Mean^β	RIL Mean	Std. Dev.	RIL Range	RIL Pr > F^§	Heritability^¥
Na⁺ (mmolkg^-1)	1700.00	1424.3^ns	1430.7	246.24	861.97–2733.35	<0.0001	0.98
K⁺ (mmolkg^-1)	420.00	591^ns	547.3	107.59	335.99–884.18	<0.0001	0.95
NaK (ratio)	4.07	2.38**	2.8	0.56	1.25–5.32	<0.0001	0.24
SIS	8.40	3.00***	4.7	0.72	3.00–8.73	<0.0001	0.44
CHL (SPAD unit)	20.56	19.54^ns	24.2	4.25	13.72–43.67	<0.0001	0.45
SHL (cm)	32.07	44.52***	40.7	3.21	22.60–59.73	<0.0001	0.90
RTL (cm)	6.73	10.08**	7.4	0.64	4.67–11.27	<0.0001	0.61
DWT (g)	0.06	0.11*	0.1	0.01	0.04–0.16	<0.0001	0.01
SRR (ratio)	4.98	4.53^ns	5.6	0.53	3.08–9.79	<0.0001	0.63

Na⁺: shoot sodium concentration, K⁺: shoot potassium concentration, NaK: ratio of the shoot sodium and shoot potassium content, SIS: salt injury score, CHL: chlorophyll content, SHL: shoot length, RTL: root length, DWT: shoot dry weight, SRR: shoot length to root length ratio
^βSignificant differences between Bengal and Pokkali, ^nsno significant differences, *significant at 0.05 probability level, **significant at 0.01 probability level, ***significant at 0.001 probability level
^§Genotypic differences among RIL
^¥Broad sense heritability computed on family mean basis