in-vitro germination attributes of some Citrus species

In order to raise stocks to be used as rootstocks, an in-vitro study was undertakent during the year 2011–12 at the Tissue Culture Laboratory and at the Department of Fruit Science, College of Horticulture and Forestry, Jhal rapatan city, Jhalawar (Rajasthan). From the findings of the experiment, it appeared that seeds of Carrizo, Rangpur lime and Rough lemon differed significantly in respect to germination (%), peak period of germination (days) and polyembryony (%). The maximum germination (88.66%), peak period of germination (26.33 days) and polyembryony (58.61%) were observed in Rough lemon, Carrizo and Rough lemon, respectively. The minimum germination (78.66%), peak period of germination (19.00 days) and polyembryony (26.58%) were observed in Carrizo, Rangpur lime and Rangpur lime respectively. Carrizo rootstock produced maximum no. of nodes (2.86), no. of internodes (2.03) and no. of leaves (4.26), whereas, maximum shoot length (4.93cm) and root length (5.33cm) were recorded in Rough lemon rootstock. From the growing attributes it is manifested that Carrizo having the highest no. of nodes is dwarfing in nature and Rough lemoan having minimum no. of nodes is having vigours growth behaviour.