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Advanced Yield Trial of Clonal Hybrids of Potato

M. A. Kawochar
TCRC, BARI

B. C. Kundu
TCRC, BARI

S. Naznin
TCRC, BARI

M. M. Hossain
TCRC, BARI

A. T. M. T. Islam
TCRC, BARI

A. A. Mahamud
TCRC, BARI

M. M. Sheikh
TCRC, BARI

M. M. Rahman
TCRC, BARI

S. Akter
TCRC, BARI

N. V. Ahmed
TCRC, BARI

S. C. Halder
TCRC, BARI

M. A. Hossain
TCRC, BARI

B. K. Goswami
TCRC, BARI

M. J. Uddin
TCRC, BARI

Abstract/ Executive Summary:

The AMMI model was used evaluating tuber yield stability of eight potato genotypes in randomized complete block design with three replications at Bogra, Debigon, Gazipur, Jamalpur, Jessore and Munshigonj during rabi cropping season in 2013-14. The objectives were to estimate the nature and magnitude of genotypes and environmental interaction (GEl) for tuber yield at 65 days after planting (DAP) and 90 DAP to identify stable potato genotypes for general adaptation and unstable genotypes for specific adaptation. The average tuber yield over locations at 65 DAP of the genotypes ranged from 20.52 t/ha in check BARl Alu-8 (Cardinal) to 27.52 t/ha in clone 9.35. In AMMI stability value (ASV) method, a genotype with least ASV score is the most stable; accordingly clone 9.125, followed by BARl Alu-28 (Lady Rosetta), clone 9.91 and BARl Alu-7 (Diamant) were the most stable. Clone 9.125, 9.91 and BARl Alu-28 (Lady Rosetta) were located toward the center of biplot having zero interaction. Based on the genotypic selection index (GSI) the most desirable genotype for selection of both stability and high tuber yield is clone 9.125 followed by clone 9.91. These two clones, 9.125 and 9.91, can be selected as early bulker and included in regional yield trial. The average tuber yield at 90 DAP of the genotypes ranged from 31.18 t/ha in check BARl Alu-28 (Lady Rosetta) to 43.8 t/ha in clone 9.35. In ASV method, clone 9.125, followed by check BARl Alu-28 (Lady Rosetta) and clone 9.91 were the most stable.Biplot analysis displayed that clone 9.44 and 9.35 and environment of Gazipur and Jessore had the great effect in the GE interaction. Clone 9.35 had specific adaptation with environment of Gazipur and Jamalpur. Clone 9.125,9.91, BARl Alu-28 (Lady Rosetta), BARl Alu-8 (Cardinal) and clone 9.112 were located toward the center of biplot having zero interaction, therefore, they can be considered as stable. Based on the GSI the most desirable genotype for selection of both stability and high tuber yield is clone 9.125 followed by clone 9.91 and 9.35. They were also more stable and high yielder than checks. These four clones viz. 9.125, 9.91 and 9.35 can be evaluated in regional yield trial next year as high yielding table potato.

Keywords: AMMI analysis, Environment interactions, Genotypes of potato; Tuber yield of potato; Stability

Location: Bogra, Debigonj, Gazipur, Jamalpur, Jessore, and Munshigonj

Start Date: 00-00-2013

End Date: 00-00-2014

Program Area: Variety and Species

Commodity: Potato

Objectives:

To identify high yielding potato genotypes

Methodology:

Five clonal hybrids, developed from own crossing program of TCRC, BARI, along with BARI Alu- 7 (Diamant), BARI Alu- 8 (Cardinal) and BARl Alu- 28 (L. Rosetta) as check varieties were planted in randomized complete block design with three replications at designated six locations (Bogra, Debigonj, Gazipur, Jamalpur, Jessore, and Munshigonj) over the Bangladesh during 2013-14. The unit plot size was 3m x 3m. Whole tubers were planted with a spacing of 60 x 25 cm. Planting was done in second half of November, 2013. Fertilizers doses and necessary intercultural operations were done as per TCRC recommendation. The crop was harvested at 90 DAP. Data were recorded on days to start of emergence, emergence at 30 days after planting (DAP), plant vigor (1-10 scale) at 45 DAP; plant height (cm), foliage coverage (%) and number of stem/hill at 60 DAP; tuber yield (t/ha) and dry matter (%) at 65 DAP; number of tuber/hill, weight of tuber/hill (kg), single tuber weight (g), tuber number/stem, dry matter (%), tuber yield (t/ha), grading by weight and number and tubers' morphological characteristics at 90 DAP. The recorded data for different characters were subjected to combined analysis of variance by using MSTATC to find out the variation among the different genotypes. Treatment means were separated by Duncan's Multiple Range Test. Finally adaptability and phenotypic stability analyzes were performed by the AMMI model. After selecting the AMMI model, a study of adaptability and phenotypic stability of the biplot graphic was designed. This graphic was obtained by the combinations of the orthogonal axis of the IPCAs. The biplot term refers to a type of graphic that contains two categories of points or markers. In this study, it refers to genotypes and environments. The biplot graphic interpretation was based on the variation caused by the main additive effects of genotype and environment, and the multiplicative effect of the G x E interaction. The abscissa represents the main effects (overall aver- age of the variables of the genotypes evaluated) and the ordinate is the first interaction axis (lPCAI). In this case, the lower the IPCA 1 value (absolute values), the lower its contribution to the G x E interaction; therefore, the more stable the genotype. The ideal genotype is one with high productivity and IPCA 1 values close to zero. An undesirable genotype has low stability associated with low productivity. Finally, the predictive averages were estimated according to the selected model. The CROPSTAT software was used for AMMI analysis. The larger the IPCA score, either negative or positive, the more specifically adapted a genotype is to certain environments. Smaller ASV scores indicate a more stable genotype across environments. Based on the rank of mean grain yield of genotypes (RYj) across environments and rank of AMMI stability value (RYi) a selection index called GSI was calculated for each genotype which incorporates both mean grain yield and stability index in a single criterion (GSi).

Source of Information: Annual Research Report 2013-14, TCRC, BARI, September 2014, pp: 13-32.

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Regarding to tuber yield at 65 DAP, clone 9.44 and 9.35 and environment of Gazipur, Jamalpur and Munshigonj had great effect in the GE interaction. Clone 9.44 had specific adaptation with environment of Jessore, while clone 9.35 had specific adaptability with environment of Gazipur and clone 9.112 had specific adaptability with environment of Jamalpur. The most desirable genotype for selection of both stability and high tuber yield are clone 9.125 and 9.91. These two clones can be selected as early bulker and included in regional yield trial. Regarding to tuber yield at 65 DAP, clone 9.44 and 9.35, and environment of Gazipur and Jessore had the great effect in the GE interaction. Clone 9.44 had specific adaptation with environment of Gazipur and Jessore, while 9.35 had specific adaptation with environment of Gazipur and Jamalpur. The most desirable genotype for selection of both stability and high tuber yield is in clone 9.125 followed by clone 9.112, 9.91 and 9.35. These four can be evaluated in regional yield trial as high yielding table potato.

Knowledge Management: Report/Proceedings