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Adolfo Rosati, Andrea Paoletti, Giorgio Pannelli, and Franco Famiani

these cultivars exhibit greater branching associated with smaller diameters of trunk, branches, and shoots, resulting in higher yield efficiency and a greater number of fruiting shoots in the small canopy volume allowed in super high-density systems

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Herbert Thompson, J.M. Joshi, R.B. Dadson, and M. Nobaht

Vegetable Soybean Cultivars belonging to MG III thru V were evaluated for their Seed Yield Efficiency (SYE) and Resistance to Heliothis Zea.

This study was conducted in 1968 and 1969. Each entry was planted in a single row plot. Each plot was 5.0 m long and 0.75 m apart in a randomized complete block design with 4 replications.. All entries were evaluated for Seed Yield Efficiency by computing the ratio of seed dry matter wt. to non-seed dry matter wt. and their resistance as the percentage of damage pods.

Preliminary data indicated that cultivars kim and Oakland (MG III), Kingston and Jefferson (MG IV), Pershing and PI 416.467 (MG V) were very high in SYE while Fuji (MG III), Sanga (MG IV) and PI 417.266 (MG V) were observed to have high level of resistance to Heliothis Zea.

We hope that these cultivars could be used as parents for the development of Breeding Program in Vegetable Soybean.

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Malcolm W. Smith, Mark D. Hoult, and Jeremy D. Bright

Low yields and high harvesting costs are long-standing problems in mango (Mangifera indica L.) cultivation. In an effort to increase productivity in the scion 'Kensington Pride' we examined the impact of nine different rootstocks over a 10-year period. Rootstock effects on fruit production were significant in most seasons, and cumulative yields (nine seasons of cropping) for the best treatment ('Sg. Siput') exceeded those of the poorest treatment ('Sabre') by 141%. Yield efficiencies (expressed on both a trunk cross-sectional area and canopy silhouette area basis) were also significantly affected by rootstock. Rootstock effects on yield and yield efficiency were generally consistent across seasons, despite large seasonal variations in yield. Harvest rates were also influenced by rootstock, and were poorly correlated with tree size. These results demonstrate possibilities for manipulating mango scion productivity through rootstock genotype.

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Fenton E Larsen and Stewart S. Higgins

The influence of 9 rootstock on growth and production of `Goldspur' (GS) and `Wellspur Delicious' (WS), and of 3 rootstock on growth and production of `Red King Delicious' (RK) and `Golden Delicious' (GD) apple was evaluated. The spur-type `Delicious' (WS) produced more fruit per tree than the non-spur (RK) strain with Mailing (M) 7 and Malling-Merton (MM) 106 but not with M 26. GD produced more fruit per tree than GS on M 7 and M 26 but not MM 106. Yield efficiencies were usually superior with spurred strains. Efficiency of RK was markedly inferior to GD and WS. Comparing cumulative yields among 9 stocks within spurred strains showed that highest yields were with MM 106 roots. Clonal stocks were more efficient than seedling. The least size-controlling stocks (seedling, MM 104, MM 109, and M 25) tended to be less efficient than M 2, M 7, M 26, MM 106, or MM 111, but the trends throughout the experiment were not consistent. Seedling, MM 104 and MM 109 had the largest trees with spurred tops, and M 26 the smallest.

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Fenton E Larsen and Stewart S. Higgins

The influence of 9 rootstock on growth and production of `Goldspur' (GS) and `Wellspur Delicious' (WS), and of 3 rootstock on growth and production of `Red King Delicious' (RK) and `Golden Delicious' (GD) apple was evaluated. The spur-type `Delicious' (WS) produced more fruit per tree than the non-spur (RK) strain with Mailing (M) 7 and Malling-Merton (MM) 106 but not with M 26. GD produced more fruit per tree than GS on M 7 and M 26 but not MM 106. Yield efficiencies were usually superior with spurred strains. Efficiency of RK was markedly inferior to GD and WS. Comparing cumulative yields among 9 stocks within spurred strains showed that highest yields were with MM 106 roots. Clonal stocks were more efficient than seedling. The least size-controlling stocks (seedling, MM 104, MM 109, and M 25) tended to be less efficient than M 2, M 7, M 26, MM 106, or MM 111, but the trends throughout the experiment were not consistent. Seedling, MM 104 and MM 109 had the largest trees with spurred tops, and M 26 the smallest.

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Gabino H. Reginato, Víctor García de Cortázar, and Terence L. Robinson

orchards, fruit per tree and yield per tree were divided by the fraction of PAR intercepted by the trees ( PAR f ; %) multiplied by the land area assigned to the trees. The resulting crop load or yield efficiency values had units of fruits or kilograms

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Malcolm W. Smith, Jeremy D. Bright, Mark D. Hoult, Richard A. Renfree, Tony Maddern, and Neil Coombes

) examined nine rootstocks under ‘Kensington Pride’ that differed in yield by 141%. Rootstock effects on tree size have been of similar magnitude. Although there is clear evidence that rootstocks can improve yield and yield efficiency in mango, all

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Nicole L. Russo, Terence L. Robinson, Gennaro Fazio, and Herb S. Aldwinckle

., 2001 ; Norelli et al., 2003 ). Geneva® rootstocks exhibit high cumulative yield efficiency in multiple size classes combined with enhanced disease and, in some cases insect, resistance ( Autio et al., 2005a , 2005b ; Cummins and Aldwinckle, 1983

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Lorenzo León, Raúl de la Rosa, Diego Barranco, and Luis Rallo

reported ( León et al., 2004a , b ; Santos–Antunes et al., 2005 ). In this work, the results concerning earliness of bearing and initial crop and yield efficiency of a comparative field trial including 15 selections, from the previously cited seedling

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Gerry H. Neilsen, Denise Neilsen, Frank Kappel, and T. Forge

, total annual crop was harvested and was weighed at the commercial harvest date for each cultivar. Yield efficiency (YE) was subsequently calculated by dividing harvest (kg) by the end of the growing season TCSA (cm 2 ) for each year. A randomly harvested