Effect of the parthenocarpy gene P1 and ploidy on fruit and bunch traits of plantain-banana hybrids

Ortíz, Rodomiro; Vuylsteke, D

doi:10.1038/hdy.1995.162

Cited by 33 publications

(17 citation statements)

References 14 publications

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“…The parthenocarpic fruits obtained either by hormone application or by preventing fertilization at low night temperature showed a deformed fruit shape (Bosland and Votava, 1999) and a reduced fruit size (Rylski, 1986). Genetically controlled parthenocarpy has been observed in tomato (Vardy et al, 1989), banana (Qrtiz and Vuylsteke, 1995) and cucumber (Rudich et al, 1977). A transgenic approach has been successfully applied for obtaining parthenocarpic fruits in eggplant and tobacco (Rotino et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Selection of Sweet Pepper (Capsicum Annuum L.) Genotypes for Parthenocarpic Fruit Growth

Tiwari¹,

Dassen

Heuvelink³

2007

Acta Hortic.

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Yield irregularity and blossom-end-rot are major problems in sweet pepper production, which can be reduced by parthenocarpy. However no commercial parthenocarpic cultivars are available. The purpose of this study was to find parthenocarpic genotype(s) of sweet pepper with the ability to produce good quality fruits without seeds. Eleven genotypes of sweet pepper were studied at normal (20/20°C D/N) and at low night temperature (20/10°C D/N), in two greenhouse compartments from January till May. Fruit length, diameter, fresh and dry weight and number of seeds per fruit were measured. A higher percentage of parthenocarpic fruits was observed for all genotypes at low night temperature compared to normal temperature. Within the genotypes which showed at least 60% parthencarpic fruit growth at low night temperature, two groups were distinguished, which showed a different expression of parthenocarpy in response to the environment. In one set of genotypes (Line 1 and Line 3) high expressivity for parthenocarpy was found irrespective of night temperature. In another set of genotypes (Gen A, Gen B, Gen C, Lamuyo A, Lamuyo B and Bruinsma Wonder), a high level of parthenocarpy was expressed at low night temperature only, which may be due to non-viable pollen at low night temperature. Further evaluation of the latter six genotypes resulted in one genotype (Bruinsma Wonder) for which the absence of seeds only marginally influenced shape and size of fruits. These selected genotypes may eventually lead to an exploitation of parthenocarpy in sweet pepper breeding.

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Section: Introductionmentioning

confidence: 99%

Selection of Sweet Pepper (Capsicum Annuum L.) Genotypes for Parthenocarpic Fruit Growth

Tiwari¹,

Dassen

Heuvelink³

2007

Acta Hortic.

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“…Irrespective of the precision of our genetic models, our analysis shows that it was possible to dissect quantitative trait variation in progeny derived from a triploid organism like plantain. Moreover, the reported effects of the genetic markers were expected since ploidy, fruit parthenocarpy, and host-response to black sigatoka significantly influence the phenotype for bunch and fruit traits in Musa (SIMMONDS 1995;ORTIZ and VUYLSTEKE 1995a;CRAENEN and ORTIZ 1996). The recent development of DNA markers in Musa (KAEMMER et al 1992;FAURE et al 1993;HOWELL et al 1994;JARRET et al 1994) may enhance our capability for dissecting quantitative trait variation and advanced genetic manipulations for the betterment of the plantain and banana genomes.…”

Section: Resultsmentioning

confidence: 99%

“…Hybrid seeds were in vitro germinated (VUYLSTEKE et al 1990). Both plantain parents have a duplex and simplex genotype for fruit parthenocarpy (ORTIZ and VUYLSTEKE 1995a) and black sigatoka resistance (ORTIZ and VUY LSTEKE 1994a), respectively; whereas the wild banana has a recessive genotype for both loci (SIMMONDS 1952;ORTIZ and VUYLSTEKE 1994a).…”

Section: Methodsmentioning

confidence: 99%

“…The effect of major genes on QTV can be explained by linkage or pleiotropism and may act in an additive or non-additive manner. The nonadditive gene interaction can be either within the locus (dominance or intralocus interaction) or between loci (epistasis or interlocus interaction) (FAL-The independent effect of ploidy and genetic markers in quantitative trait variation has been investigated recently in Musa (ORTIZ and VUYLSTEKE 1995a;VANDENHOUT et al 1995;CRAENEN and ORTIZ 1996). However, knowledge of combined effects of specific types of gene action in the plantain genome is lacking.…”

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confidence: 99%

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Ploidy Manipulations and Genetic Markers as Tools for Analysis of Quantitative Trait Variation in Progeny Derived from Triploid Plantains

2004

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Plantains (Musa spp. AAB group) are starchy bananas widely grown in Africa and tropical America by small landholders. Genetic analysis of the plantain genome is difficult due to its triploidy and high sterility. Ploidy manipulations (scaling up and down the number of chromosomes) and interspecific plantain‐banana hybridization opened the path for the genetic amelioration of the crop and for the investigation of its genome for further manipulations. This report shows the associated effects of ploidy and of the major loci controlling vegetative fruit parthenocarpy and resistance to black sigatoka fungal leaf spot on growth and yield characteristics of plantain‐banana euploid hybrids. The number of copies of the black sigatoka resistance allele (bs1) and of the fruit parthenocarpy gene (P1) in addition to their intralocus interaction and ploidy level were all found to significantly affect bunch and fruit characteristics in euploid plantain‐banana hybrids. Epistasis significantly affected fruit weight and size in one cross but not in another. Significant multiple regression models combining ploidy and genetic markers explained 15 % to 85 % of quantitative trait variation (QTV). The amount of QTV accounted by ploidy and genetic markers varied according to the characteristic and cross in which the markers were examined.

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“…Cauliflower is simple mutation from cabbage-like Brassica oleracea. Other single genes include parthenocarpy in banana (Ortiz and Vuylsteke 1995) and dwarf varieties of wheat and rice (Peng et al 1999). Many other single genes are likely to be identified with worthwhile contributions to plant agronomic characteristics.…”

Section: Identification Of Novel Genesmentioning

confidence: 98%

Exploiting novel germplasm

Heslop-Harrison

2002

Aust. J. Agric. Res.

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Only 0.1% of the world's plant species are grown as crops, and even within these crop species, only a small proportion of the total genetic variability is used in commercial varieties. Here, I address 6 inter-related questions about why it might be desirable to exploit novel germplasm in breeding programs: to exploit plant diversity, to meet continuing breeding objectives in major crops, to develop new crops, to meet new needs from existing crops, to ensure all the world's people benefit from breeding programs, and to ensure the sustainability of crop production. Both species which are rarely cultivated, and genes from accessions and species related to existing crops, can be exploited to meet the need for improvement of agricultural production. Molecular and statistical methods have the potential to speed introduction of novel germplasm-allowing quantitative assessment of diversity, characterisation of desirable genes, tracking of chromosomes, genes, or gene combinations through breeding programs, selection of rare recombination events, and direct gene transfer through transformation. But the challenges of maintaining desirable characters in varieties incorporating novel germplasm, overcoming genetic stability problems, and ensuring safety are considerable.

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Effect of the parthenocarpy gene P1 and ploidy on fruit and bunch traits of plantain-banana hybrids

Cited by 33 publications

References 14 publications

Selection of Sweet Pepper (Capsicum Annuum L.) Genotypes for Parthenocarpic Fruit Growth

Selection of Sweet Pepper (Capsicum Annuum L.) Genotypes for Parthenocarpic Fruit Growth

Ploidy Manipulations and Genetic Markers as Tools for Analysis of Quantitative Trait Variation in Progeny Derived from Triploid Plantains

Exploiting novel germplasm

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