Table 1.

The Fate of Tassel Primordia Measured in Different ra2 Alleles and Inbred Lines

Genotype	Total Primordiaa	Main Branchesb	Mixed Branchesb	Spikelet Multimersb	Spikelet Pairsb	Single Spikeletsb,c
A188	80.6 ± 9.4	0.07 ± 0.02	0.13 ± 0.03	0.038 ± 0.02	0.74 ± 0.03	–
ra2-R, B73-3d	100.8 ± 16.0	0.12 ± 0.06	0.19 ± 0.07	0.21 ± 0.10	0.46 ± 0.09	–
Pe	<0.01	0.028	<0.01	<0.01	<0.01
B73	81.1 ± 17.2	0.078 ± 0.02	0.0017 ± 0.0004	0.022 ± 0.02	0.9 ± 0.03	–
ra2-R, A188-3f	68.1 ± 13.7	0.1 ± 0.04	0.07 ± 0.04	0.35 ± 0.10	0.4 ± 0.13	–
P	<0.01	0.074	<0.01	<0.01	<0.01
W22/ra2-dm	99.6 ± 15.5	0.12 ± 0.03	0.023 ± 0.03	0.044 ± 0.03	0.54 ± 0.08	0.26 ± 0.13
ra2-dm	73.3 ± 13.6	0.078 ± 0.02	0.13 ± 0.05	0.26 ± 0.08	0.19 ± 0.03	0.32 ± 0.008
P	<0.01	<0.01	<0.01	<0.01	<0.01	0.19
+/ra2-mum4	99.9 ± 10.7	0.17 ± 0.02	0.022 ± 0.01	0.029 ± 0.01	0.77 ± 0.03	–
ra2-mum4	81.2 ± 9.9	0.13 ± 0.04	0.084 ± 0.02	0.11 ± 0.06	0.67 ± 0.07	–
P	<0.01	0.019	<0.01	<0.01	<0.01

^aTotal number of primordia on the tassel main axis (average of >12 individuals).

^bRatio of the number of primordia that produce a specific kind of lateral organ (main branch, mixed branches, spikelet multimers, spikelet pairs, and single spikelets) to the total number of primordia.

^cSingle spikelets were only found in the W22 inbred line and in ra2-dm segregating families, all of which are in a W22 background.

^dra2-R was introgressed into B73 more than three generations.

^eSignificant values of the t test at P = 0.01 are in bold.

^fra2-R was introgressed into A188 more than three generations.