The effect of altered dosage of a mutant allele of Teosinte branched 1 (tb1-ref) on the root system of modern maize

Table 1 Dry biomass allocation, shoot and root traits in tb1 - ref heterozygotes ( tb1 / Tb1 , B73 background) and homozygotes ( tb1/tb1 , B73 background) compared to modern maize inbred B73 and Balsas teosinte

	Tiller #		TRL (cm)		Dry weights (g/plant)										SRL (cm/g)		Leaf tips #
					Total		Main stem		Tillers		Root		R/S ratio
tb1/Tb1	4 ± 1.0	a	76226 ± 5831	a	71.1 ± 4.8	a	36.3 ± 4.6	a	21.8 ± 4.3	a	12.9 ± 1.0	a	0.22 ± 0.03	a	5908.9 ± 510.2	a	45.6 ± 7.3	a
tb1/tb1	11.5 ± 1.6	b	119770 ± 8657	b	86.6 ± 7.9	b	27 ± 4.2	abc	42.6 ± 6.7	b	17.2 ± 1.5	b	0.24 ± 0.04	a	6963.4 ± 538.9	a	96 ± 11.6	b
B73	0	c	66900 ± 4321	a	63.2 ± 4.9	a	52.2 ± 4.1	b	0	a	11.1 ± 0.8	a	0.21 ± 0.02	a	6027 ± 522.7	a	14.5 ± 5.8	c
Teosinte	20.8 ± 1.1	d	124388 ± 93265	b	92.3 ± 9.8	b	19.7 ± 3.6	c	54.8 ± 4.8	c	18.7 ± 1.1	b	0.24 ± 0.03	a	6651.8 ± 567.4	a	126.5 ± 8.2	d
Genotype effect	**		*		*		**		*		*		NS		NS		*

Notes.
-Values are Least Square Means from ANOVA ± standard errors (n = 6) at 35 days after transplanting.
-Means within a column followed by the same letter are not significantly different at α = 0.05. A mean value with multiple letters indicates that it is not significantly different at α = 0.05 from multiple other genotypes as indicated.
-(*) significant at α = 0.05, (**) significant at α = 0.01, NS = Not Significant.
-(#) = number, TRL = total root length, R/S = root to shoot biomass ratio, SRL = specific root length.

ISSN: 2730-6844