Introduction
Globally, sugarcane has got a prime candidate as a cash crop which fulfilled 80% world sugar demand and emerging biofuel crop in near future due to its dexterous biomass production (Gallo-Meagher et al., 2000). This tropical grass is the member of family Poaceae which contains high polyploidy level (2n=80~270) (Heinz and Mee, 1969). This grass is the most suitable promising crop which could be utilized mainly for sugar production and then for power generation, paper making, live stock feed, chipboard, cane wax, fertilizer, bioethanol, syrup and mulch. Recently, additional revenue being produced in the form of bioplastics by sugarcane stalk and bagasse from sugarcane. Sugarcane as a perennial crop is the world’s most resourceful crop in converting solar energy into chemical energy. The preliminary but significant results led to the utilization of in vitro cell and tissue culture for a range of functions such as micropropagation (Hendre et al., 1983), breeding (Krishnamurthy and Tlaskal, 1974), germplasm conservation (Taylor and Dukic, 1993), the eradication of systemic pathogens (Parmessur et al., 2002) and genetic engineering (Arencibia et al., 1995) of sugarcane. (Taylor et al., 1992) tested sugarcane cultivars readily produce embryogenic callus from young leaf tissue and readily regenerate plants from callus. Plant tissue culture techniques have become a powerful tool for studying and solving basic and applied problems in plant biotechnology especially gene introduction (Villalobos and Arias, 1987). Therefore, it is significant for every genotype to optimize media with different levels of plant growth regulators along with growing conditions so that optimum regeneration could be attained (Anjum et al., 2012). Lack of suitable multiplication procedure and contamination by systemic diseases are the serious problem to multiply an elite genotype of sugarcane in the open field.

Problems associated with the traditional breeding methods have been overcome by the use of plant tissue culture techniques for the propagation of sugarcane and these techniques ensure disease free multiplication of the plants by reducing the time period required for the multiplication (Khan et al., 2006). Large-scale production of disease-free quality planting material of sugarcane can also be achieved through micropropagation. Use of plant tissue culture techniques reduces the breeding cycle (Lloyd and Pillay, 1980).

1 Results and Discussion
Lack of proficient and reproducible regeneration system to produce transformed plants at an adequate rate is still the key factor seriously restricting the improvement of crops through genetic transformation (Popelka and Alpeter, 2003). Tissue culture is a powerful tool for studying and solving, problems in plant biotechnology. A tissue culture system provides considerable quantities of target tissue.

To check the response of fresh orange juice and dry milk on in vitro regeneration, we used selected media combination that we were reported already (Ijaz et al., 2012). This media combination consisted of CIM3 (Callus induction medium 3), genotype; S-2003-us- 359, Callus age; 21 days old calli and RM3 (Regeneration medium 3). CIM3 contained 3 mg/L 2, 4-D, 40 g/L sucrose and basal MS salt. RM3 contained 0.1 mg/L 2, 4-D, 0.25 mg/L BAP, 40 g/L sucrose and basal MS salt. We just modified the RM3 in this media combination by adding orange juice RM3 (a) and dry milk RM3 (b). Calli of genotype S-2003-us-359 were induced on CIM3 and 21 days old calli were transferred to RM3 (control), RM3 (a) (modified regeneration medium by adding orange juice) and RM3 (b) (modified regeneration medium by adding dry milk) (Figure 1).

The analysis of variance (ANOVA) table depicts the significant effect of regeneration media on in vitro regeneration (Table 1). This comparative study revealed that the RM3 (a) (modified RM3 by adding orange juice) gave maximum number of plants (Figure 2) the mean value 166.33 shoots per explant. This response of RM3 (a) was statistically significantly different from control (RM3) and RM3 (b); modified RM3 by adding dry milk. But RM3 and RM3 (b) are statistically similar with mean value of 134.67 and 137.77 shoots per explant respectively (Table 2, Figure 3).
 

Plant juices and liquid endosperms have been shown to possess stimulatory properties. The inclusion of liquid endosperm from immature corn (Netien et al, 1951), tomato juice (Nitsch, 1951; Straus and La Rue, 1954), immature fruits and seeds (Steward and Caplin,1952; Steward and Shantz, 1959), malt extract, yeast extract, leaf extracts from a number of plants and tumor extracts (Butenko, 1968), have been reported. These results are agreed with our results because by adding orange juice in our selected regeneration RM3), the regeneration response is enhanced.

2 Materials and Methods
The immature young leaves of sugarcane genotype S-2003-us-359 were cut into slices by using blades and scalpels and were cultured on callus induction medium containing 3 mg/L 2, 4-D, 40 g/L sucrose plus MS Salt in common. They were kept on dark conditions for callus induction.

Twenty one days old calli of this genotype were shifted on regeneration media. In this experiment regeneration medium reported by us (Ijaz et al., 2012) was modified by adding orange juice and dry milk (Table 3). Here reported regeneration medium was used as control. Data were collected on the basis of number of plants. Experiment was repeated three times.

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