Table 3.

WBK, DTH and average temperature during the ripeing period of NILs and parents

Cultivars or Lines	Fukui paddy field
	2011			2012
	DTH days	Tempa °C	WBKb %	DTH days	Temp °C	WBK %
HE	66	27.3	14.1 ± 5.4 a	66	28.1	37.2 ± 16.1 ac
NW	67	27.3	50.8 ± 21.6 b	68	28.1	82.5 ± 18.3 bd
NIL1c	68	27.3	12.9 ± 9.4 a	69	28.2	15.1 ± 2.6 a
NIL2d	68	27.3	51.3 ± 20.9 b	70	28.2	57.0 ± 13.1 cd
Cultivars or Lines	Fukui greenhouse			Kagoshima
	2012			2012
	DTH days	Temp °C	WBK %	DTH days	Temp °C	WBK %
HE	62	31.1	46.9 ± 4.0 a	63	27.9	3.5 ± 3.3 a
NW	64	31.0	89.2 ± 16.9 b	63	27.9	55.4 ± 14.5 b
NIL1	65	31.1	57.0 ± 9.4 a	63	27.9	13.4 ± 7.5 a
NIL2	65	31.1	62.1 ± 10.4 a	64	27.9	34.5 ± 6.7 c

WBK, white-back kernels; DTH, days-to-heading.

^aAverage temperature during the ripening period (20 days after heading).

^bAll values are means ± SD. Means with the same letter do not differ among NILs and the parents (P 0.05).

^cContains the qWB6 allele from HE in the NW genetic background.

^dContains the qWB6 and qWB9 alleles from HE in the NW genetic background.