EVALUATION OF SHARKA RESISTANCE IN NEW CULTIVARS AND SELECTIONS OF THE APRICOT BREEDING PROGRAMME AT CEBAS-CSIC IN MURCIA (SPAIN)

The strawberry (Fragaria × ananassa) cultivars Suvetar and Valotar have been released from the breeding programme of MTT Agrifood Research Finland. Both new cultivars overwintered as well as the control cultivars Jonsok and Polka. Suvetar overwintered even better than Polka. Suvetar was produced from the cross Polka × Emily. It scored better than the control cultivars for sensory assessed skin resistance. Measured fruit firmness of Suvetar was not significantly different from that of Polka, but was better than Jonsok. Valotar originates from a cross between Jewel and Senga Sengana. Its measured fruit firmness was better than that of Jonsok and Polka. Considering sensory assessments, the good firmness seems to be largely due to good skin resistance. The fresh flavour, yield, fruit size and fruit appearance of Suvetar and Valotar, together with improved fruit firmness, make both the new varieties suitable for the fresh fruit market.;

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THE SUCCESS OF THE LUCERNE MESSAGE IN MARLBOROUGH

Proceedings of the New Zealand Grassland Association ◽

10.33584/jnzg.1981.42.1553 ◽

1981 ◽

pp. 179-183

Author(s):

A.J. Cresswell

Keyword(s):

North America ◽

Weed Control ◽

Seed Yield ◽

Insect Pest ◽

Fold Increase ◽

Plant Spacing ◽

Insect Pest Control ◽

One Year ◽

Seed Yields ◽

New Cultivars

This paper, as well as being a testimonial to the benefit the writer has received from the Grassland Association, shows how the knowledge of scientists has been used to increase lucerne seed yields by methods of growing resistant cultivars especially for seed production as opposed to growing for hay, silage or grazing. It shows how new cultivars can be multiplied quickly by growing two crops in one year, one in each hemisphere, by using low seeding rates, wide plant spacing and very good weed control. Increased flowering of the crop has been achieved by the use of boron and the choice of time of closing; better pollination has been achieved by the use of more efficient bees - two varieties of which have been imported from North America. Weed and insect pest control and the use of a desiccant at harvest are contributing to a four-fold increase in seed yield, which should double again soon,

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MANAGEMENT OF NEW CULTIVARS FOR DRYLAND

Proceedings of the New Zealand Grassland Association ◽

10.33584/jnzg.1983.44.1650 ◽

1983 ◽

pp. 61-73 ◽

Cited By ~ 5

Author(s):

J.A. Lancashire ◽

J.L. Brock

Keyword(s):

Tall Fescue ◽

Seed Quality ◽

Technical Information ◽

Grazing Management ◽

Grass Species ◽

Hill Country ◽

Seasonally Dry ◽

Prairie Grass ◽

Management Procedures ◽

New Cultivars

Some characteristics of seed quality, establishment rates, performance in mixtures and response to grazing management of 5 new pasture plants with potential in dryland are described. On a dry hill country site in the Wairarapa, the contribution of the sown grasses established in separate plots with clovers under rotational grazing was 'Grasslands Wana' cocksfoot 65%; 'Grasslands Maru' phalaris 23%; 'Grasslands Matua' prairie grass 22%; and 'Grasslands Roa' tall fescue 13% after 2 years. The other main grass species was resident perennial ryegrass which established from buried seed (ca. 240 plants/m*) and had a major impact on the establishment and growth of the sown grasses. On a seasonally dry Manawatu flat land soil 3 grazing managementsviz. set stocked all year (S); rotational all year (R); and combination (Cl (set stocked from lambing to drafting and rotational for the remainder of the year) were applied to mixtures of the new cultivars (except that 'Grasslands Apanui' cocksfoot replaced Wana) with ryegrass and white clover stocked at 20 sheep/ha. After 3 years the contribution of the new cultivars was negligible under S and ryegrass was dominant. The R pastures became cocksfoot dominant and Matua (in winter) and chicory (in summer) contributed more than in the S system. The C system produced the most evenly balanced species contribution with only Roa remaining at (5%. A sub-trial with cocksfoot cultivars demonstrated that Wana maintained better production and tiller density ~ll,000/m2 ) than Apanui (1000/m' ) under set stocking IS). Although some of the new cultivars will require specialised management procedures to fulfil their potential in dryland, the increasing and widespread use of Matua prairie grass in farming suggests that these techniques can be adopted in commercial agriculture provided good technical information is available in a management package when the cultivar is released. Keywords: Dryland, grazing management, mixtures, Matua prairie grass, Wana cocksfoot, Roa tall fescue, Maru phalaris, Chicory

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Selection of New Late-Season Mandarin Cultivars Based on Sensory Changes and Consumer Acceptance after Fruit Cold Storage

Agronomy ◽

10.3390/agronomy11010116 ◽

2021 ◽

Vol 11 (1) ◽

pp. 116

Author(s):

Paula Tarancón ◽

Adrián Giménez-Sanchis ◽

Pablo Aleza ◽

Cristina Besada

Keyword(s):

Cold Storage ◽

Multidisciplinary Approach ◽

Consumer Preferences ◽

Consumer Acceptance ◽

Sensory Profile ◽

Skin Damage ◽

Late Season ◽

Commercial Cultivars ◽

Sensory Changes ◽

New Cultivars

Late-season mandarins are normally cold-stored to prolong the commercial season. Thus, it is necessary to investigate poststorage consumer acceptance to predict the potential success of new late-season mandarin varieties on the market. The aim of the present work was to evaluate consumer response to three new late-season cultivars preselected in the IVIA breeding programme (Omet, Matiz and Tri-703) after different cold storage periods. The three new cultivars were compared to commercial cultivars Orri, Nadorcott and Ortanique, all of which are widely available in stores. A multidisciplinary approach was used to determine the main changes during storage at 1 °C for up to one month: (1) analysis of physico-chemical parameters; (2) description of the sensory profile by semitrained assessors by the Free Choice Profile technique; (3) evaluation of consumer acceptability and purchase intention. Our results showed that the sensory changes that fruit underwent during storage depended on the variety; these changes allowed us to understand why consumer preferences varied during storage. Of the three new cultivars, two (Omet and Tri-703) showed the greatest potential for success. However, while Tri-703 can be stored for one month, Omet should not be stored longer than 15 days due to its susceptibility to manifest skin damage during storage. Of the commercial cultivars, internal Orri quality was keenly appreciated by consumers, while Ortanique was considered the most attractive variety. The multidisciplinary approach followed in this study proved to be a potent tool for selecting varieties that should be implemented in selection processes of breeding programmes.

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Diversity of pathogenic Pseudomonas isolated from citrus in Tunisia

AMB Express ◽

10.1186/s13568-020-01134-z ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Maroua Oueslati ◽

Magdalena Mulet ◽

Mohamed Zouaoui ◽

Charlotte Chandeysson ◽

Jorge Lalucat ◽

...

Keyword(s):

Phylogenetic Analysis ◽

Pseudomonas Syringae ◽

Ice Nucleation ◽

Phylogenetic Study ◽

Future Studies ◽

Citrus Orchards ◽

First Time ◽

New Cultivars

Abstract The damages observed in Tunisian citrus orchards have prompted studies on the Pseudomonas spp. responsible for blast and black pit. Prospective orchards between 2015 and 2017 showed that the diseases rapidly spread geographically and to new cultivars. A screening of Pseudomonas spp. isolated from symptomatic trees revealed their wide diversity according to phylogenetic analysis of their housekeeping rpoD and cts genes. The majority of strains were affiliated to Pseudomonas syringae pv. syringae (Phylogroup PG02b), previously described in Tunisia. However, they exhibited various BOX-PCR fingerprints and were not clonal. This work demonstrated, for the first time in Tunisia, the involvement of Pseudomonas cerasi (PG02a) and Pseudomonas congelans (PG02c). The latter did not show significant pathogenicity on citrus, but was pathogenic on cantaloupe and active for ice nucleation that could play a role in the disease. A comparative phylogenetic study of citrus pathogens from Iran, Montenegro and Tunisia revealed that P. syringae (PG02b) strains are closely related but again not clonal. Interestingly P. cerasi (PG02a) was isolated in two countries and seems to outspread. However, its role in the diseases is not fully understood and it should be monitored in future studies. The diversity of pathogenic Pseudomonas spp. and the extension of the diseases highlight that they have become complex and synergistic. It opens questions about which factors favor diseases and how to fight against them efficiently and with sustainable means.

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