Somaiya

www.somaiya.edu

Karnataka Institute of Applied Agricultural Research

Crop : Sugarcane.

Field : Plant Breeding

Collaborator : Self.

Title : VARIETAL SELECTION PROGRAMME (EARLY - VARIETIES)

Author : R.S.Patil,VasudevRao,T.D.Krishnamurthy and S.I. Harlapur.

Year : 1988-89

Performance of 12 early maturing varieties were studied to know their adapatability for early season crush.

The experimental details are as follows:
Location	: Sy.No. 121/A5
Sugarcane Varieties	: Co 6907, CoA 7701, CoC 8001, Co 8013, CoC 8201, CoA 8401,
	Co 740, Co 7508, Co 7704, CoC 671, CoT 8201, CoA 8201.
Experimental design	: Randomised Block with 3 replications.
Soil	: Light
Fertilization (Kg ha-1)	: N	P	K
	250	75	187.5
Basal	: 25	75	187.5
45 days	: 112.5
90 days	: 112.5
Irrigations	: 22
Planting	: January 1988
Harvesting	: November 1988

The varietal performance data on quality at increasing crop age and yield parameters are presented in Table 3 and 4.

TABLE - 3. SUGARCANE EARLY VARIETAL TRIAL JUICE QUALITY AT INCREASING CROP AGE.

Varieties	9 Months(Oct.)			10 Months(Nov.)			11 Months(Dec.)
	Brix	Pol	Purity	Brix	Pol	Purity	Brix	Pol	Purity
CoC 671	16.60	13.47	81.14	19.38	16.84	86.89	20.38	18.44	90.48
Co 6806	16.21	12.28	75.76	18.26	15.19	83.19	18.92	16.94	89.53
Co 6907	15.88	12.96	81.61	18.53	16.37	88.34	19.30	17.34	89.84
Co 7508	17.83	14.94	83.79	18.82	16.71	88.79	19.74	17.64	89.36
CoA 7701	15.86	12.45	78.50	17.78	15.22	85.60	18.49	16.27	87.99
Co 7704	16.29	12.12	74.40	19.49	17.03	87.38	19.69	17.46	88.67
CoC 8001	16.50	13.73	83.21	19.40	17.30	89.18	20.20	18.24	90.30
Co 8013	17.29	14.05	81.26	19.85	17.01	85.69	20.33	18.13	89.18
CoA 8001	16.17	12.75	78.85	18.20	15.61	85.77	20.20	18.09	89.55
CoC 8201	17.79	15.17	85.27	19.86	17.83	89.78	20.54	18.51	90.12
CoT 8201	17.66	14.55	82.39	19.91	17.82	89.50	20.20	18.02	89.21
CoA 8401	17.10	14.37	84.04	19.62	17.82	90.82	19.99	18.24	91.25

TABLE - 4. SUGARCANE EARLY VARIETAL TRIAL YIELD PARAMETERS.

Variety	Inital Plant Popl. at	Mean Popl.	Number of	Yield	CCS %	Sugar
	45 days per m2	per m2 at 120 days	canes per	per/ha	11 months	Yield
			ha ('ooo)	(M.T)		(M.T) ha-1
CoC 671	6.6	15.0	80.7	83.05	12.76	10.60
Co 6806	5.8	18.0	73.0	62.02	11.98	7.50
Co 6907	6.8	14.0	118.8	75.06	12.28	9.30
Co 7508	6.7	11.0	77.0	53.09	12.46	6.70
CoA 7701	6.8	13.0	78.0	70.09	11.40	8.10
Co 7704	7.4	15.0	63.3	77.00	12.29	9.50
CoC 8001	5.9	15.0	76.7	78.01	12.95	10.10
Co 8013	8.0	17.0	77.4	63.01	12.80	8.10
CoA 8201	6.5	15.0	92.8	72.8	12.79	9.70
CoC 8201	7.0	13.0	85.8	77.02	13.13	10.10
CoT 8201	7.6	17.0	63.1	47.08	12.72	6.10
CoA 8401	7.8	16.0	88.7	78.05	13.01	10.20

The juice analysis showed that varieties CoC 8201, CoT 8201, CoA 8401, Co 8013 and CoC 8001 had higher pol than standards CoC 671 and Co 7704 at 9 and 10 months crop age. Only CoC 8201 recorded slightly higher pol than CoC 671 at 11 months in December. None of the varieties could out perform variety CoC 671 in yield. CoC 8201, CoC 8001 and CoA 8401 have recorded yield on par with Co 7704. Sugar yield per hectare was found to be higher in CoC 671 followed by CoA 8401, CoC 8201, CoC 8001, CoA 8201 and Co 7704.

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