Yield stability analysis of nine spring bread wheat genotypes in the central highlands of Ethiopia

Assefa, Solomon; Geleta, Bekele; Tanner, D.G.

doi:10.4314/acsj.v3i1.54563

Cited by 2 publications

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“…The coefficient of determination values (Table 5) suggest that 85-99 per cent of the variation in yield was accounted for by variation in growing environments. Tariq et al (2003) reported similar results in maize, and Assefa, Gelete & Tanner (1995) in wheat.…”

Section: Grain Yield and Yield Stabilitymentioning

confidence: 57%

Combining inorganic fertilizer with poultry manure for sustainable production of quality protein maize in Ghana

Dapaah¹,

Ennin²,

Asafu-Agyei³

2009

Ghana Journal of Agricultural Science

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Field studies were used, in the major and minor seasons of 2002 and 2003 at Fumesua (forest zone) and Ejura (transition zone), to determine the effects of combining inorganic fertilizer with poultry manure on grain yield stability and economic benefits of quality protein maize (QPM) production. The experimental design was a randomized complete block with four replicates. The treatments were (i) recommended inorganic fertilizer rate (IFR) (76 kg N ha -1 ); (ii) recommended poultry manure (PM) (3 t PM ha -1 ); (iii) 57 kg N ha -1 + 0.75 t PM ha -1 (i.e. ¾ IFR + ¼ PM); (iv) 38 kg N ha -1 + 1.5 t PM ha -1 (i.e. ½ IFR + ½ PM); (v) 19 kg N ha -1 + 2.2 t PM ha -1 (i.e. ¼ IFR + ¾ PM); and (vi) no fertilizer (control). An open-pollinated QPM variety Obatanpa was used. Averaged over all seasons and locations, grain yield for the recommended IFR was 3.31 t ha -1 , similar to grain yields of 3.22 and 3.10 t ha -1 for the ½ IFR + ½ PM and ¼ IFR + ¾ PM treatments, respectively. However, these treatments together yielded 7-14 per cent higher than the yields produced at 3 t PM and ¾ IFR + ¼ PM; and 32-38 per cent higher than the control. The yields at ¼ IFR + ¾ PM and recommended IFR were most stable across all environments, with mean yields above the grand mean and regression coefficients less than but close to 1.0. The ¼ IFR + ¾ PM and ½ IFR + ½ PM recorded the highest net benefits and marginal rate of returns (MRR) of 187 -349 per cent over 3 t PM ha -1 . The recommended IFR and ¾ IFR + ¼ PM treatments had lower net benefits, but higher total variable costs than the ¼ IFR + ¾ PM and ½ IFR + ½ PM; and, therefore, were dominated by the latter.

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Section: Grain Yield and Yield Stabilitymentioning

confidence: 57%

Combining inorganic fertilizer with poultry manure for sustainable production of quality protein maize in Ghana

Dapaah¹,

Ennin²,

Asafu-Agyei³

2009

Ghana Journal of Agricultural Science

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“…Developing a variety that performs equally well under different environmental conditions is a great challenge to plant breeders (Assefa et al 1995). In general the performance of a variety is the cumulative effect of contributions from both genotype and environment.…”

Section: Introductionmentioning

confidence: 99%

Development of mulberry varieties for sustainable growth and leaf yield in temperate and subtropical regions of India

et al. 2011

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Sericulture is an agro-based industry, which heavily depends on mulberry (Morus spp.) for its sustainability, as mulberry leaf is the only available feed for the silkworm Bombyx mori L. Sericulture, in West Bengal and other subtropical regions in India, suffers from lack of adequate quantity of quality mulberry leaf during the colder months, the best season for rearing the high yielding bivoltine silkworm hybrids. In order to develop mulberry varieties, which can sustain normal growth during these colder months to yield better, efforts have been made in different research institutes in India. The present report is part of such an effort in which accessions in germplasm bank were screened for better growth, leaf retention and leaf yield contributing associated traits. Twenty three selected parents were crossed, 3,500 seeds were sown, 2,700 seedlings were transplanted to progeny row trail, selected 210 hybrids were evaluated under primary yield trial and finally nine hybrids along with a control variety were studied in detail for all leaf yield contributing traits under final yield trial. Stability analysis was adopted to identify hybrids, which can yield stably across seasons. The hybrids CT-44 and CT-11 out yielding the control by 17.17 and 7.11% were selected as these hybrids yield 7.93 and 8.15 mt/ha leaf respectively during the colder months (February) for their direct use as cultivars in West Bengal and other subtropical areas of India to sustain bivoltine sericulture to produce quality and gradable silk fibers.

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Yield stability analysis of nine spring bread wheat genotypes in the central highlands of Ethiopia

Cited by 2 publications

References 0 publications

Combining inorganic fertilizer with poultry manure for sustainable production of quality protein maize in Ghana

Combining inorganic fertilizer with poultry manure for sustainable production of quality protein maize in Ghana

Development of mulberry varieties for sustainable growth and leaf yield in temperate and subtropical regions of India

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