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COMPARATIVE PERFORMANCE OF SUGARCANE VARIETIES AND GENOTYPE ENVIRONMENTAL INTERACTIONS

Qayum, Abdul (1998) COMPARATIVE PERFORMANCE OF SUGARCANE VARIETIES AND GENOTYPE ENVIRONMENTAL INTERACTIONS. PhD thesis, Sindh Agriculture University, Tando Jam.

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Abstract

Sixteen genotypes of sugarcane (S'accharum hybrid spp.) in two separate maturity groups were evaluated in Peshawar valley of NWFP during crop seasons 1990/91 to 1993/94. This study of comparative performance, or final evaluation was carried out with estimation of genotype-environment interactions as a precise method of selection. Early and mid maturing groups(EMG and MMG) constituted eight genotypes and a check variety. Almost all genotypes were derived from the already screened germ pool, secured from the Canal Point f (CP), Florida source, except BI;' 162, which was advanced to the present study from the Faisalabad source of Barbados/Faisalabad origin. The experiments were conducted at three locations at distinct ecological zones of the Valley, having severe, mild and frost-free growing and different soil conditions. The sites were infield location I at Mardan and out-field locations 2 and 3 at Peshawar and at Sakhakot of Malakand Agency. At each site, both the EMG and MMG cultivars were arranged in RCB design. Plot size, number of rows and replicates were marked according to the land pieces, but three replicates were counted finally. Three plant crops were harvested at each location, successively followed by three first - ratoon at location 1 and 2. Twelve principal characters, seven of them yield contributing and five of quality, besides seven ancillary/additional characters along with response of genotypes to frost and pests were examined in each plant crops. Still five more characters were studied in ratoon crops. Germination %, number of tillers and millable stalks/ha, stalk diameter and weight, tons of cane/ha (TCH), Brix, Pol %, Purity %, monthly commercial cane sugar (MCCS %) and monthly tons of sugar/ha (MTSH) were studied very keenly. Stability analyses, besides ANOVA were specifically conducted for all these characters. Simple statistical methods were used for lodging %, fiber %, and growth rate in stalks, leaves and internodes/plant, internodes and stalk length in plant crops together with tillers/stool, millable stalks, TCH, MCCS % and MTSH in ratoon crops. In plant crops, combined analyses of variance and estimates of variance components were computed for 12 principal characters under split-split plot arrangement in which locations and genotypes were fixed and years kept at random. The data were proceeded further for phenotypic stability, using Eberhart and Russell

Item Type:Thesis (PhD)
Uncontrolled Keywords:Sugercane, Sugercane Genotypes, Germination percentage, Number of tillers, Number of Millablestalks, Plant height, Stalk Diameter, Stalk Weight, Tons of Cane/Hectare, Brix of, EMG, MMG, BF 162, Ratoon crops, CP 69/1059, CP 77/400,
Subjects:Agriculture & Veterinary Sciences(a) > Agriculture(a1)
ID Code:235
Deposited By:Mr Ghulam Murtaza
Deposited On:17 Jun 2006
Last Modified:21 May 2009 17:52

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