Pollination and fruit growth models for studying the management of kiwifruit orchards. I. Models description

Lescourret, Françoise; Habib, Robert H.; Génard, Michel; Agostini, D.; Chadœuf, Joël

doi:10.1016/s0308-521x(97)00042-5

Cited by 22 publications

(15 citation statements)

References 46 publications

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“…The performance of the thermal time approach, however, was not good (RMSE was 0.26 and 0.25 at low and high PPFD, respectively), with under prediction of most of the observed data except when the temperature is optimum (Figure 2). Note that, in addition to the linear response, a value of T base = 7.5 o C, commonly used for kiwifruit (MORLEY-BUNKER & SALINGER, 1987;LESCOURRET et al, 1998LESCOURRET et al, , 1999, is also not an appropriate assumption in the thermal time approach (Figure 2). The T base in the thermal time function was also set to 0 o C, but even then the response was under predicted (data not shown), with RMSE of 0.16 and 0.15 at high and low PPFD, respectively, indicating that eq.…”

Section: Resultsmentioning

confidence: 99%

“…Crop simulation models are incomplete tools and errors in the predictions are still quite frequent, including in kiwifruit models (LESCOURRET et al, 1998(LESCOURRET et al, , 1999. The responses of some basic plant processes to environmental factors are still poorly described in crop simulation models, and, from the results obtained here, the temperature response of growth and developmental parameters in kiwifruit (using thermal time) is one among them.…”

Section: Streckmentioning

confidence: 93%

“…(3) is plotted in figure 1. The thermal time function used in kiwifruit models (MORLEY-BUNKER & SALINGER, 1987;LESCOURRET et al, 1998LESCOURRET et al, , 1999 was also used in this study as a comparison with eq. (3).…”

Section: Methodsmentioning

confidence: 99%

“…However, a literature search showed that thermal time is still being used in models of horticultural crops, including kiwifruit (e.g. MORLEY-BUNKER & SALINGER, 1987;LESCOURRET et al, 1998LESCOURRET et al, , 1999. This comprises a rationale for developing a nonlinear temperature response function in kiwifruit models.…”

Section: Ciência Rural V 33 N 2 Mar-abr 2003mentioning

confidence: 99%

“…The assumption of a T min = 0 o C has been successfully used in models of other winter and summer crops (WANG AND ENGEL, 1998;YAN & HUNT, 1999). A T base = 7.5 o C for kiwifruit, however, seems to be not appropriate, even though it has been used in kiwifruit models (MORLEY-BUNKER & SALINGER, 1987;LESCOURRET et al, 1998LESCOURRET et al, , 1999. A T base =10 o C was used for grape vine (Vitis vinifera L.), a species grown in similar seasons and with similar growth habit (GITTEREZ et al, 1985;SHULTZ, 1992).…”

Section: Streckmentioning

confidence: 99%

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A generalized nonlinear tempeature response function for some growth and developmental parameters in kiwifruit (Actinidia deliciosa (A. Chev.) C. F. Liang & A. R. Ferguson)

Streck

2003

Cienc. Rural

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Temperature is a major factor that affects metabolic processes in living organisms. Thermal time has been widely used to account for the effects of temperature on crop growth and development. However, the thermal time approach has been criticized because it assumes a linear relationship between the rate of crop growth or development and temperature. The response of the rate of crop growth and development to temperature is nonlinear. The objective of this study was to develop a generalized nonlinear temperature response function for some growth and developmental parameters in kiwifruit (Actinidia deliciosa (A. Chev.) C. F. Liang & A. R. Ferguson). The nonlinear function has three coefficients (the cardinal temperatures), which were 0ºC, 25ºC, and 40ºC. Data of temperature response of relative growth rate, relative leaf area growth, net photosynthesis rate, and leaf appearance rate in kiwifruit (female cv. Hayward) at two light levels, which are from published research, were used as independent data for evaluating the performance of the nonlinear and the thermal time functions. The results showed that the generalized nonlinear response function is better than the thermal time approach, and the temperature response of several growth and developmental parameters in kiwifruit can be described with the same response function.

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Section: Resultsmentioning

confidence: 99%

Section: Streckmentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: Ciência Rural V 33 N 2 Mar-abr 2003mentioning

confidence: 99%

Section: Streckmentioning

confidence: 99%

See 3 more Smart Citations

A generalized nonlinear tempeature response function for some growth and developmental parameters in kiwifruit (Actinidia deliciosa (A. Chev.) C. F. Liang & A. R. Ferguson)

Streck

2003

Cienc. Rural

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Modelling Fruit Quality: Ecophysiological, Agronomical and Ecological Perspectives

Génard

Lescourret

Production Practices and Quality Assessment of Food Crops Volume 1

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Relations between several traits linked to sexual plant reproduction in Theobroma cacao L.: number of ovules per ovary, number of seeds per pod, and seed weight

Cilas

Machado²,

Motamayor³

2009

Tree Genetics & Genomes

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Tropical perennial plants cultivated outside their place of origin call for major germplasm characterization and prebreeding work. For cacao breeding, the selection process has to optimize the weight of cacao beans produced per tree by increasing the number of pods produced, the number of seeds per pod (NoSP), and the mean weight of seeds produced (SW). NoSP and SW were studied over nine consecutive years in a collection of more than 200 clones. The number of ovules per ovary (NoOV) was also examined in a subsample of this collection in order to evaluate the ability to predict NoSP. NoSP and SW showed a relatively normal distribution with heritabilities of 0.29 and 0.51, respectively. The composite trait "mean seed weight per pod" showed a generalized extreme value distribution of intermediate heritability (0.43). NoSP and SW were found to be genetically independent. NoOV was highly heritable (h 2 =0.810), but it did not provide good prediction of NoSP. The largest seeds were observed in genotypes derived from crosses between cultivated cacao trees, which had been formerly domesticated. Domestication therefore favored seed size, while for the other traits examined, similar variation was found between wild and domesticated populations.

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Pollination and fruit growth models for studying the management of kiwifruit orchards. I. Models description

Cited by 22 publications

References 46 publications

A generalized nonlinear tempeature response function for some growth and developmental parameters in kiwifruit (Actinidia deliciosa (A. Chev.) C. F. Liang & A. R. Ferguson)

A generalized nonlinear tempeature response function for some growth and developmental parameters in kiwifruit (Actinidia deliciosa (A. Chev.) C. F. Liang & A. R. Ferguson)

Modelling Fruit Quality: Ecophysiological, Agronomical and Ecological Perspectives

Relations between several traits linked to sexual plant reproduction in Theobroma cacao L.: number of ovules per ovary, number of seeds per pod, and seed weight

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