Table II.

Characterization of fatty acid composition of the mitochondrial inner membrane isolated from shoots of maize seedlings of parental lines and populations grown at 25°C and 14°C

Material	Unsaturation Degreea	Mean Chain Lengthb	Monounsaturated Species	Unsaturated Species	Unsaturated 18-Carbon Species	18:1/18:0	Unsat C18/Sat C18c
	Δ/mol	Carbon atom no.	mass %
25°C
Parental lines
B73	0.970	17.04	4.9	49.8	49.3	1.1	12.3
IABO78	0.980	17.05	5.1	50.2	49.6	1.1	12.5
Populations
C0	0.970	17.04	4.9	49.8	49.3	1.1	12.3
C4-L	0.968	17.05	5.1	49.6	49.2	1.1	11.6
C4-H	0.990	17.07	5.3	51.0	50.7	1.2	12.8
Meand	0.979	17.06	5.2	50.3	49.9	1.2	12.2
lsde	0.011	0.02	ns	0.6	0.6	0.1	0.5
lsdf	nsg	ns	ns	0.5	0.5	ns	ns
14°C
Parental lines
B73	1.125	17.20	6.2	57.8	57.3	1.8	17.8
IABO78	1.163	17.23	7.6	60.1	59.3	2.3	20.5
Populations
C0	1.173	17.24	6.1	59.9	59.4	1.8	19.3
C4-L	1.068	17.18	5.1	54.9	54.4	0.9	10.4
C4-H	1.273	17.33	9.1	65.0	64.4	3.4	25.6
Meand	1.170	17.25	7.1	59.9	59.4	2.1	18.0
lsde	0.020	0.02	0.3	1.3	1.3	0.2	1.2
lsdf	ns	ns	0.3	ns	ns	0.2	1.0

Results are the mean values of four determinations (two experiments and two samples per experiment).

^aCalculated as follows: Δmol = (1[% monoenes]/100) + (2[% dienes][/100) + (3[% trienes]/100). 

^bCalculated as follows: ∑ (percentage of the fatty acid × its carbon atom number)/100. 

^cUnsat C18/Sat C18, Ratio of unsaturated 18-carbon species and saturated 18-carbon species. 

^dMean of the two selected populations C4-L and C4-H. 

^elsd (P ≤ 0.05) for comparing parental lines and/or populations. 

^flsd (P ≤ 0.05) for comparing the source population C0 with the mean C4-L and C4-H. 

^gns, Not significant.