Green Leaf Lettuce Breeding Lines with Resistance to Corky Root, 06-831 and 06-833

Abstract: The objective of this work was to estimate the stability and genotypic adaptability of advanced lines and cultivars of curled green-leaf lettuce (Lactuca sativa), in different growing environments and seasons, using the REML/Blup mixed model. Ten genotypes, seven cropping environments, and two growing seasons were studied in 2015. Plant yield traits were evaluated, and data were subjected to the Selegen-REML/Blup software. Genotype stability and adaptability were analyzed using the harmonic mean of genotypic values (HMGV) and the relative performance of genotypic values (RPGV), respectively. The harmonic mean of RPGV (HMRPGV) was used to simultaneously estimate the stability, adaptability, and yield of breeding lines or cultivars. Considering the combined analysis of the two seasons for the set of traits, the lines L6, L7, and L8 were selected as promising ones and recommended for planting. The breeding lines selected for all season exhibit good yield and are considered superior to the commercial cultivars Vanda and Vera.

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Red Leaf Lettuce Breeding Line with Resistance to Corky Root, 06-810

HortScience ◽

10.21273/hortsci.50.1.143 ◽

2015 ◽

Vol 50 (1) ◽

pp. 143-144

Author(s):

Beiquan Mou

Keyword(s):

Breeding Line ◽

Corky Root ◽

Lettuce Breeding ◽

Leaf Lettuce

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06-857, a Green Leaf Lettuce Breeding Line with Resistance to Leafminer and Lettuce Mosaic Virus

HortScience ◽

10.21273/hortsci.45.4.666 ◽

2010 ◽

Vol 45 (4) ◽

pp. 666-667 ◽

Cited By ~ 1

Author(s):

Beiquan Mou ◽

Edward J. Ryder

Keyword(s):

Mosaic Virus ◽

Green Leaf ◽

Breeding Line ◽

Lettuce Mosaic Virus ◽

Lettuce Breeding ◽

Leaf Lettuce

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Crisphead Lettuce Breeding Lines with Resistance to Corky Root and Lettuce Mosaic Virus

HortScience ◽

10.21273/hortsci.42.3.701 ◽

2007 ◽

Vol 42 (3) ◽

pp. 701-703 ◽

Cited By ~ 6

Author(s):

Beiquan Mou ◽

Ryan J. Hayes ◽

Edward J. Ryder

Keyword(s):

Mosaic Virus ◽

Lettuce Mosaic Virus ◽

Breeding Lines ◽

Corky Root ◽

Lettuce Breeding

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Selection of loose-leaf lettuce breeding lines based on non-parametric indexes

AFRICAN JOURNAL OF BIOTECHNOLOGY ◽

10.5897/ajb2017.16176 ◽

2017 ◽

Vol 16 (40) ◽

pp. 1984-1989

Author(s):

dos Santos Candido Willame ◽

Enith Tobar-Tosse Dora ◽

Silva Soares Renato ◽

da Silva Santos Lucas ◽

Andrade Franco Carolina ◽

...

Keyword(s):

Breeding Lines ◽

Lettuce Breeding ◽

Leaf Lettuce ◽

Selection Of ◽

Non Parametric

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Comparison between non-parametric indexes in the selection of biofortified curly lettuce

Comunicata Scientiae ◽

10.14295/cs.v11i.3351 ◽

2020 ◽

Vol 11 ◽

pp. e3351

Author(s):

Joicy Vitória Miranda Peixoto ◽

Gabriel Mascarenhas Maciel ◽

Ana Carolina Silva Siquieroli ◽

Lucas Medeiros Pereira ◽

José Magno Queiroz Luz ◽

...

Keyword(s):

Agronomic Traits ◽

Indirect Selection ◽

Stem Diameter ◽

Anthocyanin Content ◽

Grand Rapids ◽

Commercial Cultivars ◽

Lettuce Breeding ◽

Selection Indexes ◽

Leaf Lettuce ◽

Selection Of

Selection indexes can be applied to simultaneous analysis of traits, increasing the efficiency of breeding in choosing the genotypes that meet the needs of both the market and the consumer. While it is a technic applied to several cultures, there are few studies about it in lettuce lines. For this reason, the aim of this study was to comparate assess the efficiency of different selection indexes for selecting biofortifiedleaf lettuce lines with good agronomic traits. The experiment was carried out at the Estação Experimental de Hortaliças of Federal University of Uberlândia (UFU), campus Monte Carmelo, in 2018. The experiment was designed in full randomized blocks of 3 repetitions with 25 leaf lettuce genotypes (22 lines from cultivars Pira 72 versus Uberlândia 10000 and 3 commercial cultivars – cv. Grand Rapids, UFU-Biofort and Uberlândia 10000). The lines are part of the UFU biofortified lettuce breeding program and were assessed for the total green mass (g), the stem diameter (cm), commercial leaves count, plant diameter (cm), foliar temperature (°C), SPAD index, anthocyanin content (mg 100g-1 sample), and bolting (days after sowing). To estimate selection gains, 10 genotypes were selected using both direct and indirect selection, as well as the traditional index, the sum of ranks index, Willians base index, and the multiplicative index. Mulamba and Mock sum of ranks index and Subandi multiplicative index provided the biggest total gains for the traits assessed in biofortified leaf lettuce. Both indexes were similar in selecting genotypes.

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Growth analysis of green-leaf lettuce under different sources and doses of organic and mineral fertilization

Revista Colombiana de Ciencias Hortícolas ◽

10.17584/rcch.2019v13i2.8521 ◽

2019 ◽

Vol 13 (2) ◽

pp. 237-247

Author(s):

Rúbia Rejane Ribeiro ◽

Jose Luiz Rodrigues Torres ◽

Valdeci Orioli-Junior ◽

Hamilton Cesar De Oliveira Charlo ◽

Dinamar Márcia Da Silva Vieira

Keyword(s):

Organic Matter ◽

Growth Analysis ◽

Chicken Manure ◽

Residual Effects ◽

Green Leaf ◽

Organic Fertilization ◽

Mineral Fertilization ◽

Lettuce Yield ◽

Leaf Lettuce ◽

Different Sources

The objective of this study was to evaluate the influence of different sources and doses of organic and mineral fertilization on the production of green-leaf lettuce. The experiment design used randomized blocks in a factorial scheme (6×3), with six doses of fertilizers (1 = 0; 2 = 25; 3 = 50; 4 = 100; 5 = 150, and 6 = 200% of the recommended fertilization for green-leaf lettuce crop) and three sources of fertilizers [cattle manure (CaM) and chicken manure (ChM), decomposed, on a wet basis and applied 100% at planting at the doses: CaM – 0, 12.5, 25, 50, 75, 100 Mg ha-1; ChM – 0, 5, 10, 20, 30, 40 Mg ha-1; mineral fertilization (MF) varying the N levels: 0, 37.5, 75, 150, 225, 300 kg ha-1 plus 400 kg ha-1 of P2O5 and 60 kg ha-1 of K2O]. The fertilization with CaM and ChM was more efficient than the MF at increasing the production of green-leaf lettuce, mainly because of the higher residual effects of P in the Oxisol. The ChM provided a higher soil pH, P and K, while the CaM provided a higher soil Mg, organic carbon and organic matter. The dose with 144% of organic fertilization exclusively on a wet basis corresponding to 72 Mg ha-1 of CaM and 29 Mg ha-1 of ChM resulted in the highest green-leaf lettuce yield.

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Parasitological analysis of green leaf lettuce cultivated in different production systems

Semina Ciências Agrárias ◽

10.5433/1679-0359.2017v38n2p801 ◽

2017 ◽

Vol 38 (2) ◽

pp. 801

Author(s):

Juliana Santiago Santos ◽

Cristina Atsumi Kuba ◽

Francislaine Anelize Garcia Santos ◽

Aline Da Silveira Batista ◽

Stênio Clemente Paião Sitolino ◽

...

Keyword(s):

Production Systems ◽

Vegetable Consumption ◽

Intestinal Parasites ◽

Leafy Vegetables ◽

Green Leaf ◽

Organic System ◽

Cultivation System ◽

Hydroponic System ◽

Sanitary Conditions ◽

Leaf Lettuce

This study analysed parasite contamination in green leaf lettuce (Lactuca sativa), grown in different cultivation systems (conventional, organic, and hydroponic), from a family farmer cooperative in the municipality of Presidente Prudente, São Paulo, Brazil. Samples were collected at weekly intervals during five months, totalling 180 vegetable samples (60 samples of leaf lettuce from each cultivation system). Lettuce leaves were washed with 0.5% Extran MA 02, and the resulting fluid subjected to sedimentation and centrifugal flotation for recovery of parasite structures. Overall, 71 samples (39.4%) were contaminated with at least one parasite structure, 34 (47.9%) from lettuce grown in the hydroponic system, 20 (28.2%) from the organic system, and 17 (23.9%) from the conventional system. Entamoeba spp. cysts were the most common parasite structures found in the leafy vegetables, with the highest cyst counts found in the hydroponic system (p = 0.003). It is concluded that, regardless of the cultivation system (conventional, organic, or hydroponic), there is a possibility of green leaf lettuce contamination by intestinal parasites. Measures that improve sanitary conditions during production, as well as proper hygiene during the preparation of raw leafy vegetables, may be important to reduce contamination and consequent transmission of parasite diseases from raw leafy vegetable consumption.

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