Physiological analysis of growth and yield variation of rapeseed and mustard

Rapeseed and mustard crops are the second most important source of edible oil after groundnut in India. The average yield of these crops is around 600 kg/ha which has been static for several years. These low yields are of increasing concern in view of the short supply of oil seeds in India. Considerable breeding efforts are being directed to improving production potential as well as stability of yield in these crops (Prakash, 1980). An understanding of the physiological basis of yield formation can be of great help in selecting for high and stable yields. However, there is little information available on the production physiology of these crops (Mehrotra, Saxena & Moosa, 1976; Bhargava & Tomar, 1982).

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Physiological analysis of the growth, development and yield of oil-seed sesame

The Journal of Agricultural Science ◽

10.1017/s0021859600088158 ◽

1980 ◽

Vol 95 (3) ◽

pp. 733-736 ◽

Cited By ~ 3

Author(s):

S. N. Saha ◽

S. C. Bhargava

Keyword(s):

North America ◽

Management Practices ◽

Animal Feed ◽

Sesamum Indicum ◽

Edible Oil ◽

Average Yield ◽

Oil Seed ◽

Physiological Analysis ◽

Growth Development ◽

Seed Yields

Sesame (Sesamum indicum L.) is a crop of great antiquity which is widely grown in tropical and subtropical regions of Asia, Africa, South and North America and to some extent in Russia for edible oil and for animal feed purposes. The average yield in India is only about 235 kg/ha. Even under good management practices the seed yields usually remain poor and, therefore, commercial prospects of sesame production are not good.

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Biodiesel production potential from edible oil seeds in Iran

Renewable and Sustainable Energy Reviews ◽

10.1016/j.rser.2011.03.004 ◽

2011 ◽

Vol 15 (6) ◽

pp. 3041-3044 ◽

Cited By ~ 55

Author(s):

M. Safieddin Ardebili ◽

B. Ghobadian ◽

G. Najafi ◽

A. Chegeni

Keyword(s):

Edible Oil ◽

Biodiesel Production ◽

Production Potential ◽

Oil Seeds

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Physiological analysis of growth and yield variation in groundnut (Arachis hypogaea L.)

Electronic Journal of Plant Breeding ◽

10.5958/0975-928x.2017.00180.6 ◽

2017 ◽

Vol 8 (4) ◽

pp. 1258

Author(s):

V.A. Mane ◽

M.Y. Ladole ◽

A.A. Shinde ◽

A.R. Bhuyar

Keyword(s):

Arachis Hypogaea ◽

Growth And Yield ◽

Yield Variation ◽

Arachis Hypogaea L ◽

Physiological Analysis

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Growth and yield formation of sugar beet ( Beta vulgaris L.) under strip tillage compared to full width tillage on silt loam soil in Central Europe

European Journal of Agronomy ◽

10.1016/j.eja.2016.10.017 ◽

2017 ◽

Vol 82 ◽

pp. 182-189 ◽

Cited By ~ 12

Author(s):

Daniel Laufer ◽

Heinz-Josef Koch

Keyword(s):

Sugar Beet ◽

Beta Vulgaris ◽

Central Europe ◽

Growth And Yield ◽

Silt Loam ◽

Full Width ◽

Silt Loam Soil ◽

Loam Soil ◽

Strip Tillage ◽

Yield Formation

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PHYSIOLOGICAL BASIS OF YIELD VARIATION OF TEA (CAMELLIA SINENSIS) DURING DIFFERENT YEARS OF THE PRUNING CYCLE IN THE CENTRAL HIGHLANDS OF SRI LANKA

Experimental Agriculture ◽

10.1017/s0014479709990482 ◽

2009 ◽

Vol 45 (4) ◽

pp. 429-450 ◽

Cited By ~ 1

Author(s):

W. A. J. M. DE COSTA ◽

D. M. S. NAVARATNE ◽

A. ANANDACOOMARASWAMY

Keyword(s):

Harvest Index ◽

Biomass Partitioning ◽

Sink Strength ◽

Down Regulation ◽

Physiological Basis ◽

Area Index ◽

Yield Decline ◽

Yield Variation ◽

Shoot Number ◽

Significant Yield

SUMMARYThe objective of this study was to elucidate the physiological basis of the significant yield decline that occurs during the fourth year of the pruning cycle of tea. Biomass partitioning, which was hypothesized to be a major factor in causing this yield decline, was measured by destructive harvests of entire tea bushes, in two contrasting, mature, field-grown tea cultivars (TRI 2025 and DT1) at the end of different years of the pruning cycle. In both cultivars, yield showed continuous increases from year 1 to 3, followed by reductions of 44% and 35% in TRI2025 and DT1 respectively in the fourth year. Patterns of biomass partitioning to roots, stems or branches did not correlate with the above yield variation whereas harvest index, canopy leaf area index and mature leaf dry weight showed variations which paralleled the yield variation. The fourth-year decline in harvest index was brought about by reductions in both shoot number per m2 and mean individual shoot weight, which indicate a reduction in sink strength. Both cultivars showed reductions in light-saturated photosynthetic rate of maintenance foliage during the second half of the pruning cycle, indicating reduced source capacity. Hence, a combined reduction of both sink strength and source capacity during the fourth year could have brought about the significant yield reduction in tea. A significant increase of root starch in the fourth year indicated a down-regulation of physiological activities of the bush towards the end of the pruning cycle. Mechanisms responsible for this down-regulation need to be elucidated by further research.

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Growth and yield differences between triazine-tolerant and non-triazine-tolerant cultivars of canola

Australian Journal of Agricultural Research ◽

10.1071/ar01159 ◽

2002 ◽

Vol 53 (6) ◽

pp. 643 ◽

Cited By ~ 31

Author(s):

M. J. Robertson ◽

J. F. Holland ◽

S. Cawley ◽

T. D. Potter ◽

W. Burton ◽

...

Keyword(s):

Harvest Index ◽

Growth Analysis ◽

Oil Content ◽

Cropping Systems ◽

Growth And Yield ◽

Physiological Basis ◽

Use Efficiency ◽

The Difference ◽

Radiation Extinction ◽

Radiation Use

Canola tolerant to the triazine group of herbicides is grown widely in Australian broad-acre cropping systems. Triazine-tolerant (TT) cultivars are known to have a yield and oil content penalty compared with non-TT cultivars. This study was designed to elucidate the crop physiological basis for the yield differences between the two types. Two commercial cultivars, near-isogenic for the TT trait, were compared in a detailed growth analysis in the field, and 22 crops were compared for phenology and crop attributes at maturity. In the growth analysis study, the TT trait was found to lower radiation use efficiency, which carried through to less biomass at maturity. There were minimal effects on leaf area development and harvest index, and no effect on canopy radiation extinction. Across the 22 crops, where yield varied from 240 to 3400 kg/ha in the non-TT cultivar, yield was on average 26% less in the TT cultivar due to less biomass produced, as there was no significant effect on harvest index. The difference in oil content (2-5%) was greater in low oil content environments. Flowering was delayed by 2-10 days with a greater delay being in later flowering environments. Quantification of the physiological attributes of TT canola allows the assessment of the productivity of different cultivar types across environments.

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