scholarly journals Nursery Selection for High Early Fruit Yield in Subtropical Strawberries

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 548E-549
Author(s):  
P.J.S. Lopez ◽  
C.K. Chandler
Keyword(s):  
Total Yield ◽  
Fruit Production ◽  
Fruit Yield ◽  
Plant Production ◽  
First Year ◽  
Early Season ◽  
Factorial Mating ◽  
Selection For ◽  
Factorial Mating Design ◽  
Strawberry Cultivars

Development of new strawberry cultivars for winter fruit production in Florida entails growing of hybrid seedlings in a nursery in the summer of the first year for runner plant production. Two runner plants are taken from each seedling and planted in the fruiting field in the fall. An experiment was conducted to see if it is possible to predict which genotypes in the nursery will have the highest early season fruit yield. Seedlings from 24 families from a 6 × 4 factorial mating design were grown in a nursery. From each family, daughter plants of 20 seedlings with the highest vigor and 20 randomly picked seedlings were then evaluated in the fruiting field. Plants from selected (high-vigor) seedlings were more vigorous, but had fewer crowns and runners, than unselected plants. More inflorescences were counted in selected plants than in unselected plants during the second week of January. This could account for higher early yield (yield at the end of January) and total yield (yield at the end of March) in selected than in unselected plants.

scholarly journals Genetic Variation and Response to Selection for Early Season Fruit Production in California Strawberry Seedling (Fragaria ×ananassa Duch.) Populations

2005 ◽  
Vol 130 (1) ◽  
pp. 41-45 ◽  
Author(s):  
Douglas V. Shaw ◽  
Kirk D. Larson
Keyword(s):  
Genetic Variance ◽  
Total Yield ◽  
Selection Response ◽  
Fruit Production ◽  
Fragaria Ananassa ◽  
Early Season ◽  
Selection For ◽  
Selection Intensities ◽  
Opportunity For Selection ◽  
Selection Of

The genetic opportunity for selection of early fruiting strawberry cultivars was evaluated using seedling populations from the Univ. of California (UC) breeding program in three years. Narrow-sense heritabilities for early season yield and for the proportion of an individual's total yield expressed early were moderate (h2 = 0.24-0.53) and broad-sense heritabilities were slightly larger (H2 = 0.31-0.70), suggesting the presence of some nonadditive genetic variance for these traits. These two traits were genetically correlated with each other (rg = 0.78-0.98), but only early yield was consistently genetically correlated with seasonal yield (rg = 0.52-0.82). Selection was performed for each trait using an index on full-sib family means and individual phenotypic values in two of the three years, and predicted response was compared with that obtained using vegetatively propagated runner plants from selected genotypes in the subsequent fruiting season. Statistically significant (P < 0.05) selection response was obtained in one of two years for each trait, and combined analysis demonstrated highly significant (P < 0.01) response for both traits. However, realized response over all traits and years was just 27.3% of that predicted based on the estimated heritabilities and applied selection intensities. These results suggest that selection for early yield should be based at least in part on runner plant evaluations rather than exclusively on seedling performance.

scholarly journals Anticipated selection for intrapopulation breeding of passion fruit

2017 ◽  
Vol 39 (2) ◽  
pp. 143 ◽  
Author(s):  
Natan Ramos Cavalcante ◽  
Willian Krause ◽  
Alexandre Pio Viana ◽  
Celice Alexandre Silva ◽  
Keithi Karla Xavier Porto ◽  
...  
Keyword(s):  
Fruit Production ◽  
Passion Fruit ◽  
First Year ◽  
State University ◽  
Mato Grosso ◽  
Coincidence Index ◽  
Selection For ◽  
Fruit Mass ◽  
Selection Of ◽  
Production Characteristics

 The aim of this work was to verify the efficiency of the anticipated selection of superior plants in intrapopulation breeding of passion fruit. The experiment was conducted at the Mato Grosso State University experimental area. Eight populations were evaluated. Planting was carried out in August 2010 following the randomized blocks experimental design, with ten repeats and ten plants per plot. The production characteristics of mass and number of fruits were evaluated from data obtained from two cultivation periods, the first year and the full two-year cycle of culture. Estimates of genetic parameters indicate the possibility of selection gains. The accuracies of fruit production, fruit number and fruit mass characteristics had high magnitude, independent of the selection cycle. Coincidence index estimates were high for all characteristics. Based on the results, early selection (first year) was efficient and reduced the time of selection for the best plants and can be used for passion fruit breeding. 

scholarly journals Expression of heterosis for productive traits in F1 eggplant (Solanum melongena L.) hybrids

1998 ◽  
Vol 21 (1) ◽  
pp. 99-103
Author(s):  
João Alencar de Sousa ◽  
Wilson Roberto Maluf
Keyword(s):  
Block Design ◽  
Total Yield ◽  
Solanum Melongena ◽  
Fruit Production ◽  
Fruit Weight ◽  
Fruit Yield ◽  
F1 Hybrids ◽  
Breeding Lines ◽  
Early Production ◽  
Productive Traits

This study was carried out to obtain estimates of heterosis in crosses between seven eggplant cultivars (Embu = E; Santa Genebra = SG; Viserba = V; Aubergine de Barbentane = AB; Florida Market 10 = FM; Black Beauty = BB, and Melitino = M) and two breeding lines (B-14-07 = B1 and B-31-06 = B2). The F1 hybrids used were: E x FM; E x BB; E x M; E x B1; E x B2; SG x FM; SG x BB; SG x M; SG x B1; SG x B2; V x FM; V x B1; V x B2; AB x FM; AB x M; AB x B1; AB x B2 and M x FM. Cultivars, lines and hybrids were evaluated at the ESAL experimental field in Lavras, MG, from February to October 1992. A randomized complete block design with three replications was used. Significant heterosis relative to the parental means was detected for all traits studied. Their values ranged from +41.23% to +113.31% for total fruit yield, from -11.45% to +26.17% for average fruit weight, and from +27.98% to +141.81% for early production. Heterosis relative to the superior parent ranged from +13.89% to +92.51% for total fruit yield. Hybrid pairs: SG x FM and AB x B1, V x FM and AB x FM, E x M and AB x B1 were the most heterotic relative to the parental mean for total fruit production, mean fruit weight and early production, respectively. The hybrids displaying highest heterosis relative to the superior parent for total yield were AB x B1 and SG x FM.

scholarly journals 913 PB 159 FIELD TRIAL WITH SIX MICROPROPAGATED STRAWBERRY CULTIVARS IN EGYPT

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 565a-565
Author(s):  
Fouad H. Moham
Keyword(s):  
Vegetative Growth ◽  
Total Yield ◽  
Fruit Size ◽  
Fruit Production ◽  
Planting Density ◽  
Plant Spacing ◽  
Strawberry Fruit ◽  
Petiole Length ◽  
Production Area ◽  
Strawberry Cultivars

This experiment was conducted at Ismailia, the largest strawberry fruit production area in Egypt. Runner plants of the second progeny of micropropagated cvs.: Parker, Chandler, Sequoia, Selva, Brighton and Douglas were planted in 1992/1993 to study their growth and fruiting behavior in response to planting density and runner removal. For most cvs. tested, vegetative growth i.e; petiole length and leaf area as well as fruiting i.e; fruit number and yield/plant were increased under 50cm. between plant spacing with runner intact. Sequoia, Chandler and Parker produced the best growth. Fruit size increased with 25cm. spacing and runner removal. The highest early yield was that of Sequoia and Douglas which correlated well with the number of flower trusses produced. Chandler and Selva produced the highest total yield followed by Douglas, Sequoia, Parker and Brighton.

scholarly journals Effect of Plant Density and Cultivar on the Fruiting Response of Strawberry using the Winter Annual Hill Culture System

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 800B-800
Author(s):  
Earl E. Albregts ◽  
Craig K. Chandler
Keyword(s):  
Culture System ◽  
Plant Density ◽  
Fruit Production ◽  
Fruit Yield ◽  
Fruit Rot ◽  
Plant Production ◽  
Plant Spacing ◽  
Cultural System ◽  
Winter Annual

Four strawberry (Fragaria ×ananassa, Duch.) cultivars were grown in a winter strawberry fruiting study using the annual hill cultural system and polyethylene-mulched beds during two seasons. Plants were set on 15, 30, 45, and 60 cm in row-plant spacing with two rows per bed spaced at 45 cm. Increasing plant density in the fruiting field generally increased early fruit yield and sometimes total fruit yield during two seasons. Yields of cull fruit were also increased with increased plant density. Daughter plant production decreased with increased plant density. Growers should consider planting costs, fruit rot, and harvesting problems when selecting the plant density for fruit production.

Orchestrated Flowering and Interspecific Facilitation: Key Factors in the Maintenance of the Main Pollinator of Coexisting Threatened Species of Andean Wax Palms (Ceroxylon spp.)

2020 ◽  
Vol 105 (3) ◽  
pp. 281-299
Author(s):  
Javier Carreño-Barrera ◽  
Luis Alberto Núñez-Avellaneda ◽  
Maria José Sanín ◽  
Artur Campos D. Maia
Keyword(s):  
Conservation Status ◽  
Population Decline ◽  
Floral Biology ◽  
Fruit Production ◽  
Biological Data ◽  
Fruit Yield ◽  
Insect Species ◽  
Individual Species ◽  
Pollination Services ◽  
Flower Visiting

Solitary, dioecious, and mostly endemic to Andean cloud forests, wax palms (Ceroxylon Bonpl. ex DC. spp.) are currently under worrisome conservation status. The establishment of management plans for their dwindling populations rely on detailed biological data, including their reproductive ecology. As in the case of numerous other Neotropical palm taxa, small beetles are assumed to be selective pollinators of wax palms, but their identity and relevance in successful fruit yield were unknown. During three consecutive reproductive seasons we collected data on population phenology and reproductive and floral biology of three syntopic species of wax palms native to the Colombian Andes. We also determined the composition of the associated flower-visiting entomofauna, quantifying the extent of the role of individual species as effective pollinators through standardized value indexes that take into consideration abundance, constancy, and pollen transport efficiency. The studied populations of C. parvifrons (Engel) H. Wendl., C. ventricosum Burret, and C. vogelianum (Engel) H. Wendl. exhibit seasonal reproductive cycles with marked temporal patterns of flower and fruit production. The composition of the associated flower-visiting entomofauna, comprised by ca. 50 morphotypes, was constant across flowering seasons and differed only marginally among species. Nonetheless, a fraction of the insect species associated with pistillate inflorescences actually carried pollen, and calculated pollinator importance indexes demonstrated that one insect species alone, Mystrops rotundula Sharp, accounted for 94%–99% of the effective pollination services for all three species of wax palms. The sequential asynchronous flowering of C. parvifrons, C. ventricosum, and C. vogelianum provides an abundant and constant supply of pollen, pivotal for the maintenance of large populations of their shared pollinators, a cooperative strategy proven effective by high fruit yield rates (up to 79%). Reproductive success might be compromised for all species by the population decline of one of them, as it would tamper with the temporal orchestration of pollen offer.

scholarly journals Land-Use Impact on Stand Structure and Fruit Yield of Tamarindus indica L. in the Drylands of Southeastern Ethiopia

Life ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 408
Author(s):  
Gizachew Zeleke ◽  
Tatek Dejene ◽  
Wubalem Tadesse ◽  
Pablo Martín-Pinto
Keyword(s):  
Land Use ◽  
Stand Structure ◽  
Fruit Production ◽  
Tree Density ◽  
Fruit Yield ◽  
Tamarindus Indica ◽  
Land Use Types ◽  
Significant Difference ◽  
Management Plans ◽  
Baseline Information

In this study, we evaluated stand status, dendrometric variables, and fruit production of Tamarind (Tamarindus indica L.) trees growing in bushland and farmland-use types in dryland areas of Ethiopia. The vegetation survey was conducted using the point-centered quarter method. The fruit yield of 54 trees was also evaluated. Tree density and fruit production in ha were estimated. There was a significant difference in Tamarind tree density between the two land-use types (p = 0.01). The mean fruit yield of farmland trees was significantly higher than that of bushland trees. However, Tamarind has unsustainable structure on farmlands. Differences in the dendrometric characteristics of trees were also observed between the two land-use types. Predictive models were selected for Tamarind fruit yield estimations in both land-use types. Although the majority of farmland trees produced <5000 fruit year−1, the selection of Tamarind germplasm in its natural ranges could improve production. Thus, the development of management plans to establish stands that have a more balanced diameter structure and thereby ensure continuity of the population and fruit yields is required in this area, particularly in the farmlands. This baseline information could assist elsewhere in areas that are facing similar challenges for the species due to land-use change.

scholarly journals GENERAL AND SPECIFIC COMBINING ABILITY IN SUNFLOWER (Helianthus annuus L.) / APTITUD COMBINATORIA GENERAL Y ESPECÍFICA EN EL GIRASOL (Helianthus annuus L.) / APTITUDE À LA COMBINATION GENERAL ET SPECIFIQUE CHEZ LE TOURNESOL (Helianthus annuus L.)

Helia ◽  
2001 ◽  
Vol 24 (34) ◽  
pp. 1-16 ◽  
Author(s):  
Domenico Laureti ◽  
Andrea Del Gatto
Keyword(s):  
Helianthus Annuus ◽  
Combining Ability ◽  
Central Italy ◽  
Specific Combining Ability ◽  
First Year ◽  
Male Sterile ◽  
Breeding Programs ◽  
East Central ◽  
Helianthus Annuus L ◽  
Selection For

SUMMARYA total of 245 test cross progenies obtained by crossing cytoplasmic male sterile (CMS) lines and restorer (RHA) lines were evaluated in replicated trials in 1995 and 1997. Experiments were carried out in two locations (Osimo, East Central Italy and Budrio, Northern Italy) in 1995, whereas in 1997 trials were conducted only in Osimo. General combining ability (GCA) and specific combining ability (SCA) of the parents was evaluated to identify genotypes suitable to be used as testers for breeding programs and to verify the performance of hybrids. The results obtained in 1995 were used to make test crosses in 1996 to be evaluated in 1997. The GCA and SCA of RHA and CMS lines were nearly always significant for all the studied traits when lines were randomly taken in 1995. When selected testers were used on the basis of the results of the first year, the SCA of new RHA lines and GCA of new CMS lines were not significant for achene yield, but they were for the other traits.The best GCA estimates for RHA were often higher than those of CMS, indicating that selection for RHA could be more useful than for CMS. As expected, GCA was always lower than SCA. CMS and RHA, with high variance among their test crosses for yield and many other traits, could be used as testers. The lack of a tester with high variance in all traits requires more than one tester in evaluating lines. The GCA of a line can change in function of the germplasm with which it is combined.

EFFECTS OF INORGANIC NITROGEN AND PHOSPHORUS FERTILIZERS ON SELECTED SITES OF NATIVE GRASSLAND IN WESTERN CANADA

1965 ◽  
Vol 45 (3) ◽  
pp. 229-237 ◽  
Author(s):  
M. R. Kilcher ◽  
S. Smoliak ◽  
W. A. Hubbard ◽  
A. Johnston ◽  
A. T. H. Gross ◽  
...  
Keyword(s):  
Inorganic Nitrogen ◽  
Total Yield ◽  
First Year ◽  
Western Canada ◽  
Phosphorus Fertilizer ◽  
Nitrogen And Phosphorus ◽  
Native Grass ◽  
Yield Increase ◽  
Native Grassland ◽  
Better Than

N, P, and N + P at 60, 26, and 60 + 26 lb per acre were applied on native grass sites during three successive years at seven, locations in Western Canada. Single applications of the N fertilizer resulted in 3- or 4-year total yield increases of 300 to 600 lb per acre at six locations. At Summerland the 3-year increase was nearly 1400 lb. Phosphorus fertilizer by itself provided very little yield increase. N + P gave yield increases that were only slightly better than those from N alone.Residual responses to fertilizer were important, especially in the 12- to 16-in. rainfall locations. Only about one-third of the total yield increase occurred in the first year, with the remainder coming in the subsequent seasons.Weeds, where present, showed a marked response to fertilizer N in the first season; in subsequent years the response largely disappeared.

scholarly journals Yield of gherkin in response to doses of bovine manure

2009 ◽  
Vol 27 (1) ◽  
pp. 100-102 ◽  
Author(s):  
Arnaldo Nonato P de Oliveira ◽  
Ademar P de Oliveira ◽  
Francisco de Assis P Leonardo ◽  
Iordam da S Cruz ◽  
Damiana F da Silva
Keyword(s):  
Experimental Design ◽  
Fruit Production ◽  
Fruit Yield ◽  
Northeastern Brazil ◽  
Experimental Plot

Considering the importance of gherkin in Northeastern Brazil, studies focusing on increasing its quality and yield are powerful tools to improve people social and economical condition in this region. The effects of doses of bovine manure were evaluated in gherkin yield in an experiment using cultivar Nordestino, from May to September 2006, at the Federal University of Paraíba, in Areia County, Paraíba State, Brazil. The experimental design was randomized complete blocks, with five treatments (0; 10; 20; 30, and 40 t ha-1) of bovine manure, in four replications. The working area in each experimental plot corresponded to 80 m², including 20 plants, with 2.0 x 2.0 m spaces. The highest number of fruits per plant (30) was achieved with 32.2 t ha-1 of bovine manure. Both fruit production per plant and fruit yield increased with doses of bovine manure, with maximum values of respectively 1,306 g and 19.5 t ha-1, when 40 t ha-1 of bovine manure were used.

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