RDE Abstract of Completed Research
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Cultural Management / Varietal response to inputs
- Proteins extracted from different sugarcane varieties used in this study have IE values in the range of 6.45 – 7.65. The amino acids actively present in extracted proteins could be phenylalanine, methionine, tyrosine, threonine, cysteine, glycine or serine. Molecular weight of extracted protein could also be determined based on IE values of extracted protein.
T.D. Macuro and C. L. Morales
This study employed 2-D electrophoresis technique in evaluating micropropagated plantlets at different cycles of multiplication to determine their homogeneity and variability. It utilizes protein separation procedures based on solubility differences as function of pH and ionic strength.
The isoelectric pHs of extracted proteins for both Phil 8013 and Phil 94-0913 microplantlets produced in each cycle of multiplication were found to be comparable, hence regenerated plantlets produced in every cycle were considered to be homogenous.
tatistical data show that Phil 94-0913 microplantlets produced in cycles 5, 6, 7, 8, 9, 10, 11 and 12 were statistically comparable with each other, hence uniformity and homogeneity among regenerated plantlets or cultivars are assured. For Phil 8013, microplantlets produced in cycles 2, 3, 4, 5, 6, 7, 8, and 9 were found to be comparable, hence uniformity and homogeneity of cultivars are assured.
Jean C. Nierves and Cresenciana L. Morales
The study was conducted at SRA LGAREC Station, La Granja, La Carlota City from December 2002 to December 2005 to determine the ratoon performance of three Phil 92 series and four Phil 93 series. The treatments were arranged in Randomized Complete Block Design and replicated four times using 5m x 6 m experimental plots.
Phil 92-0051 consistently obtained higher cane tonnage and sucrose content than the other varieties tested from 1st up to the 3rd rations and up to the 2nd ratoon in sugar yield.
Generally, rationing decreased tonnage and sugar yields of the tested varieties after the third ratoon and Lkg/TC increased only up to 2nd ratoon.
Based on the results, Phil 92-0051 is the only variety that consistently increased in TC/Ha and Lkg/TC up to the 3rd ratoon and sugar yield up to the 2nd ratoon.
Ratoon Performance of New Sugarcane HYVs (2006) Manlapaz, B. and J. Recuenco - Among the 17 sugarcane varieties tested, Phil 8943, Phil 90-1237 gave lower percentage reduction in TC/Ha and second ratoon crops. In terms of Lkg/TC these four sugarcane varieties were significantly comparable with those sugarcane varieties with high Lkg/TC.
Variety Performance at Different Seasons of Planting (2005) B. Manlapaz and M. Guevarra - Percent germination of 14 test varieties significantly differ with season of planting (early mid and late planting season). TC/Ha and LKg/TC of the varieties were statistically comparable at different seasons of planting. Variety means for TC/Ha and LKg/TC significantly differ. Season of planting means for TC/Ha of early planting was significantly higher than those in mid and late planting seasons. LKg means of seasons of planting were significantly different. There was a significant interaction between varieties and season of planting on LKg/Ha.
Influence of different cultural practices on ratoon yields of new HYVs (1998) M. Lazatin, S. Samiano, L. and R. Del Rosario - Three (3) varieties maintained good performance during the second ratoon. Phil 8477, Phil 7544 and Phil 85-706 performed consistently both in the first and second ratoon crops. Phil 85-566 and Phil 8583 decreased by 48.18% and 20.31% in Lkg/Ha, respectively.
Performance of five (5) Phil '89 clones at different ages of harvest (1997) M. Lazatin, S. Samiano and A. Vitug - The study evaluated the performance and stability of five sugarcane clones at different ages of harvest. The five varieties when harvested at 12 months showed maximum yields. Yields of Phil 83-442 was stable even up to the 14th month. The rest of varieties showed diminishing yields after the 12th month.
Varietal response to cane ripener (1997) M. Lazatin, S. Samiano, L. and R. Del Rosario - Spraying intervals did not give statistically significant yield increment. However, early spraying at eight weeks before harvesting gave the highest Lkg/Ha. Spraying ripener to harvestable canes help maximize purity. Phil 87-11 responded positively to ripener application.
Technology impact assessment of commercial planting of Phil 8477 at Ibaan, Batangas (1995) S. Samiano - Phil 8477 was proven to be a high yielding variety at Torrejos Farm. Net profits of more than Php 40,000/ha/yr were gained in two cropping years; CY 1993 - 94 and CY 1994 - 95.
