Table 1.

Microtubule parameters during meiotic prophase Rates are mean ± SD. In dhc1⁺ cells, when microtubules were observed over two phases, their rates were examined in each phase.

Genotype	Parameters		No. of microtubulesa
dhc1+	Elongation rate (μm min−1)	3.4  ± 1.4b	76
	Phase I	3.5  ± 1.4c	60
	Phase II	3.2  ± 1.4c	19
	Shortening rate (μm min−1)	6.4  ± 3.4d	61
	Phase I	3.9  ± 6.2e	48
	Phase II	6.2  ± 3.1e	15
	Maximum length (μm)	8.2  ± 3.6f	52
	Transition frequency (s−1)
	Elongation to shortening	0.006g	69
	Shortening to elongation	0h	44
dhc1-d2	Elongation rate (μm min−1)	2.7  ± 0.8b	22
	Shortening rate (μm min−1)	8.5  ± 2.2d	27
	Maximum length (μm)	5.3  ± 1.9f	27
	Transition frequency (s−1)
	Elongation to shortening	0.010i	25
	Shortening to elongation	0j	26

^a Number of microtubules that were examined. 

^b t test showed significant difference between values (P < 0.005). 

^c t test showed no significant difference between values (P > 0.01). 

^f t test showed significant difference between values (P < 0.001). 

^g Forty-one transitions/6730 s of total elongation time. 

^h Zero transitions/3423 s of total shortening time. 

ⁱ Seventeen transitions/1621 s of total elongation time. 

^j Zero transitions/889 s of total shortening time.