Some Comments on Infraspecific Classification of Cultivars of Melon

Pitrat, Michel; Hanelt, Peter; Hammer, K.

doi:10.17660/actahortic.2000.510.4

Cited by 184 publications

(175 citation statements)

References 0 publications

Supporting

Mentioning

151

Contrasting

Unclassified

Order By: Relevance

“…This new categorization was aided by Jeffrey methodology (1980) for classification of melon subspecies and botanical varieties (PITRAT; HANELT;HAMMER, 2000). Thus, a representation of the most contrasting phenotypes is shown in Figure 1.…”

Section: Resultsmentioning

confidence: 99%

“…The botanical var. chandalak, originally from Central Asia, showed consistent characteristics, with andromonoecious sexual expression, greenish pulp, small seeds and climacteric fruit (PITRAT; HANELT;HAMMER, 2000).…”

Section: Resultsmentioning

confidence: 99%

“…The descriptor list applied was adapted from IPGRI (2003) and supplemented by descriptors proposed by Pitrat, Hanelt and Hammer (2000) for different phenotypes of the botanical varieties. The qualitative descriptors were: ovary hairiness (short and long) (JEFFREY, 1980), sexual expression (monoecious, andromonoecious and ginomonoecious), fruit shape (globular, flat, elliptical, pear-shaped, oval, elongated, acorn-shaped and malformation), skin colour (light yellow, yellow, yellow-green, intense yellow, light yellow spotted with medium green, yellow spotted with dark green, light green, dark green, light green streaked with dark green, light green streaked with medium green and light green spotted with dark green), presence of furrows (absent, superficial, medium and deep), stripe colour (absent, light green, medium green, dark green) and pulp colour (white, greenish, orange and cream).…”

Section: Methodsmentioning

confidence: 99%

“…The data of the phenotypic characterization of generations S 1 and S 2 were compared visually with photographic records and consistent qualitative criteria for the classification of melon subspecies and their botanical varieties, according to Pitrat, Hanelt and Hammer (2000).…”

Section: Methodsmentioning

confidence: 99%

“…More recently, a study investigated the diversity of melons collected from family farming in Northeast Brazil, based on morphological and molecular characters (DANTAS et al, 2015). However, the two previous works used classifications that did not consider melon subspecies (ARAGÃO et al, 2013;TORRES FILHO et al, 2009), while the last work (DANTAS et al, 2015) used the classification by Pitrat, Hanelt and Hammer (2000), which takes these subspecies into account (agrestis, with five varieties, and melo, with eleven varieties). Nonetheless, Dantas et al (2015) only used six accessions from family farming in the state of Maranhão.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Botanical Identification and Genetic Diversity in Melons From Family Farming in the State of Maranhão

et al. 2017

View full text Add to dashboard Cite

-The aim of this work was to perform botanical identification and to estimate genetic diversity in two sequential inbred generations (progenies S 1 and S 2 ) of melon accessions from traditional agriculture in the state of Maranhão, in order to generate useful information for commercial melon breeding. Two field experiments were carried out in a completely randomized block, using four replicates of 15 accessions from a first selfing cycle in 2013, and three replicates of 25 subaccessions (generation S 2 ) in 2014. Flower and fruit descriptors were measured to obtain quantitative and qualitative data, in addition to a systematized photographic documentation of fruit for visually comparing the progenies S 1 and S 2 . Distance matrices for quantitative and qualitative data were obtained and used to perform a joint analysis and UPGMA method. Large genetic diversity was found in the accessions analysed, since the presence of melon progenies was observed in the Cucumis melo ssp. agrestis, with its botanical varieties momordica and conomom, and of the Cucumis melo ssp. melo, with the botanical varieties cantalupensis and chandalak. Divergence analysis showed the formation of three groups in generation S 1 and four groups in S 2 . However, the groups were not separated either by subspecies or by botanical variety. Thus, in addition to the large genetic diversity among and within melon accessions from family farming in the state of Maranhão, the progenies presented a large introgression of traits of the different subspecies and their botanical varieties due to the reproductive system and seed management of these species.Keywords: Botanical variety. Cucumis melo L.. Endogamic progenies.CLASSIFICAÇÃO BOTÂNICA E DIVERGÊNCIA GENÉTICA EM MELÕES DA AGRICULTURA FAMILIAR MARANHESE RESUMO -O trabalho teve como objetivos realizar a classificação botânica e estimar a diversidade genética em duas gerações endogâmicas sequenciais (progênies S 1 e S 2 ) de acessos de melão da agricultura familiar do Maranhão, visando gerar informações úteis para o melhoramento do melão comercial. Foram conduzidos dois experimentos de campo em blocos casualizados completos, com quatro repetições e 15 acessos em 2013 e, três repetições e 25 subacessos em 2014. Para avaliação dos acessos foram aplicados descritores quantitativos e qualitativos de flor e fruto, além de uma documentação fotográfica sistematizada dos frutos com análise visual, comparando os frutos das gerações S 1 e S 2 . Foram obtidas as matrizes de distância nos dois tipos de descritores e se fez a análise conjunta e em seguida realizou-se o agrupamento pelo método UPGMA. Verificou-se que nos acessos analisados, existe uma grande diversidade genética, pois foram encontradas progênies de melão da subespécie agrestis e suas variedades botânicas momordica e conomom e da subespécie melo com as variedades botânicas cantalupensis e chandalak. A análise de divergência na geração S 1 mostrou a formação de três grupos e na geração S 2 foram formados quatro agrupamentos, entretanto os grup...

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%