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

HortScience ◽  
2015 ◽  
Vol 50 (1) ◽  
pp. 143-144
Author(s):  
Beiquan Mou
Keyword(s):  
Breeding Line ◽  
Corky Root ◽  
Lettuce Breeding ◽  
Leaf Lettuce

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

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.

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

HortScience ◽  
2007 ◽  
Vol 42 (3) ◽  
pp. 701-703 ◽  
Author(s):  
Beiquan Mou ◽  
Ryan J. Hayes ◽  
Edward J. Ryder
Keyword(s):  
Mosaic Virus ◽  
Lettuce Mosaic Virus ◽  
Breeding Lines ◽  
Corky Root ◽  
Lettuce Breeding

scholarly journals THE YIELD OF LETTUCE BREEDING LINE UNDER LED LAMPS IN WINTER GREENHOUSE IN THE NORTH

2017 ◽  
pp. 38-41
Author(s):  
I. V. Dalke ◽  
I. G. Zakhozhiy ◽  
R. V. Malyshev ◽  
E. E. Grigoray ◽  
G. N. Tabalenkova ◽  
...  
Keyword(s):  
Breeding Line ◽  
The North ◽  
Lettuce Breeding

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

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

scholarly journals Differential interactions between strains ofRhizorhapis,Sphingobium,SphingopyxisorRhizorhabdusand accessions ofLactucaspp. with respect to severity of corky root disease

2014 ◽  
Vol 63 (5) ◽  
pp. 1053-1061 ◽  
Author(s):  
A. H. C. van Bruggen ◽  
O. Ochoa ◽  
I. M. Francis ◽  
R. W. Michelmore
Keyword(s):  
Root Disease ◽  
Corky Root

Reduction of leaf lettuce tipburn using an indicator cultivar

2016 ◽  
Vol 210 ◽  
pp. 14-18 ◽  
Author(s):  
Yuichi Uno ◽  
Hiroshi Okubo ◽  
Hiromichi Itoh ◽  
Ryohei Koyama
Keyword(s):  
Leaf Lettuce

scholarly journals Independent Resistant Reactions Expressed in Root and Tuber of Potato Breeding Lines with Introgressed Resistance to Meloidogyne chitwoodi

2009 ◽  
Vol 99 (9) ◽  
pp. 1085-1089 ◽  
Author(s):  
C. R. Brown ◽  
H. Mojtahedi ◽  
L.-H. Zhang ◽  
E. Riga
Keyword(s):  
Genetic Factors ◽  
Dominant Gene ◽  
Breeding Line ◽  
Single Dominant Gene ◽  
Solanum Bulbocastanum ◽  
Chromosome 11 ◽  
Meloidogyne Chitwoodi ◽  
Tuber Resistance ◽  
Advanced Backcross ◽  
Resistance Breaking

Resistance to Meloidogyne chitwoodi was introgressed from Solanum bulbocastanum into the cultivated gene pool of potato. A single dominant gene is responsible for resistance to race 1 reproduction on the root system. An additional form of resistance was discovered in certain advanced backcross clones. A BC5 clone, PA99N82-4, resisted invasion of tubers by available nematode juveniles whether supplied by weeds or challenged by several root resistance-breaking pathotypes. This tuber resistance is inherited as a single dominant gene and is linked to RMc1(blb). Because this gene has been mapped to chromosome 11, tuber resistance genetic factors are inferred to be on the same chromosome in coupling phase. Among 153 progeny derived from crosses with PA99N82-4, 42 recombinants, comprising both resistant root/susceptible tuber and susceptible root/resistant tubers, were found while other progeny were doubly resistant (like PA99N82-4) or doubly susceptible. Therefore, the existence of two linked genetic factors controlling independently expressed traits is confirmed. The combination of the two phenotypes is likely to be a sufficient level of resistance to avoid tuber damage from circumstances that provide exogenous juveniles proximal to the tubers in the soil. These factors are weed hosts of M. chitwoodi host races and pathotypes of M. chitwoodi that overcome RMc1(blb). Under field conditions, where a resistance-breaking pathotype of M. chitwoodi was present, tuber-resistant PA99N82-4 breeding line produced tubers which were commercially acceptable and not culled. A related breeding line, root resistant but tuber susceptible, and Russet Burbank were severely tuber damaged and commercially unacceptable.

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