Table 1 Details of the different stages... | Emerald Publishing

Table 1

Details of the different stages in producing certified seed potatoes in Rwanda

Stage	Length of time	Price in 2022	Multiplication factor	Result, number of potatoes
Growing of in vitro plantlet	1–1.5 months	from RAB price 115 RWF/plant	1 plantlet	1 plantlet
Plantlets used to get mini-tubers, taking 1 month	6 months of harvesting and 4 months sprouting	100 RWF per mini-tuber	1 plantlet produces 60 to 100 mini-tubers	1 gives at the average 80 mini-tubers
Generation 1 Prebasic	4 months to grow plus 4 to sprout	850 RWF per kg	10 a 12	11 × 80 = 880
Generation 2 Basic	4 months to grow plus 4 to sprout	750 RWF per kg	10 a 15	12.5 × 880 = 11,000
Generation 3 Certified	4 months to grow plus 4 to sprout	700 RWF per kg	10 a 15	12.5 × 11,000 = 137,500 certified
Total	2–3 years	450 RWF per kg	yield now and if using clean seed	12.5 to 25 t/ha (10–15; 20–30)

Stage	Length of time	Price in 2022	Multiplication factor	Result, number of potatoes
Growing of in vitro plantlet	1–1.5 months	from RAB price 115 RWF/plant	1 plantlet	1 plantlet
Plantlets used to get mini-tubers, taking 1 month	6 months of harvesting and 4 months sprouting	100 RWF per mini-tuber	1 plantlet produces 60 to 100 mini-tubers	1 gives at the average 80 mini-tubers
Generation 1 Prebasic	4 months to grow plus 4 to sprout	850 RWF per kg	10 a 12	11 × 80 = 880
Generation 2 Basic	4 months to grow plus 4 to sprout	750 RWF per kg	10 a 15	12.5 × 880 = 11,000
Generation 3 Certified	4 months to grow plus 4 to sprout	700 RWF per kg	10 a 15	12.5 × 11,000 = 137,500 certified
Total	2–3 years	450 RWF per kg	yield now and if using clean seed	12.5 to 25 t/ha (10–15; 20–30)

Source(s): Authors’ own creation