Seed Dispersal and Crop Domestication: Shattering, Germination and Seasonality in Evolution under Cultivation

Fuller, Dorian Q.; Allaby, Robin G.

doi:10.1002/9781444314557.ch7

Cited by 129 publications

(157 citation statements)

References 195 publications

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“…During crop domestication, one challenge is controlling the degree of grain shattering (Fuller and Allaby, 2009). While easy shattering causes a loss of seeds before harvest, nonshattering leads to difficulties when that grain is being threshed (Ji et al, 2010).…”

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confidence: 99%

KNOX Protein OSH15 Induces Grain Shattering by Repressing Lignin Biosynthesis Genes

et al. 2017

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Seed shattering is an agronomically important trait. Two major domestication factors are responsible for this: qSH1 and SH5. Whereas qSH1 functions in cell differentiation in the abscission zone (AZ), a major role of SH5 is the repression of lignin deposition. We have determined that a KNOX protein, OSH15, also controls seed shattering. Knockdown mutations of OSH15 showed reduced seed-shattering phenotypes. Coimmunoprecipitation experiments revealed that OSH15 interacts with SH5 and qSH1, two proteins in the BELL homeobox family. In transgenic plants carrying the OSH15 promoter-GUS reporter construct, the reporter gene was preferentially expressed in the AZ during young spikelet development. The RNA in situ hybridization experiment also showed that OSH15 messenger RNAs were abundant in the AZ during spikelet development. Analyses of osh15 SH5-D double mutants showed that SH5 could not increase the degree of seed shattering when OSH15 was absent, indicating that SH5 functions together with OSH15. In addition to the seedshattering phenotype, osh15 mutants displayed dwarfism and accumulated a higher amount of lignin in internodes due to increased expression of the genes involved in lignin biosynthesis. Knockout mutations of CAD2, which encodes an enzyme for the last step in the monolignol biosynthesis pathway, caused an easy seed-shattering phenotype by reducing lignin deposition in the AZ. This indicated that the lignin level is an important determinant of seed shattering in rice (Oryza sativa). Chromatin immunoprecipitation assays demonstrated that both OSH15 and SH5 interact directly with CAD2 chromatin. We conclude that OSH15 and SH5 form a dimer that enhances seed shattering by directly inhibiting lignin biosynthesis genes.

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confidence: 99%

KNOX Protein OSH15 Induces Grain Shattering by Repressing Lignin Biosynthesis Genes

et al. 2017

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“…Concerning the selection process during long cultivation history, Fuller and Allaby (2009) suggested that different selective pressures occurred different organs as target f selection. Similar argument was advocated by Mladenovic et al (2012) in their study on morphological characterization of Lagenaria siceraria based on multivariate analysis on fruit and seeds morphology.…”

Section: Discussionmentioning

confidence: 99%

ASSESSMENT OF TAXONOMIC AFFINITY OF INDONESIAN PUMMELO (<i>CITRUS MAXIMA</i> (BURM.) MERR.) BASED ON MORPHOLOGICAL CHARACTERS

Susandarini

Subandiyah

Rugayah³

et al. 2013

American Journal of Agricultural and Biological Sciences

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Citrus maxima is a tropical fruit species with high morphological variability on fruit characters, including shape, size, thickness of peel, flesh color and taste. This variability has been used by breeders and common people to practically distinguish different pummelo cultivars. Despite such well known variation, so far there is no published study specifically addressed the extent of phenotypic variability and taxonomy of pummelo in Indonesia. This study was, therefore, aiming at assessing phenotypic variability and taxonomic affinity of Indonesian pummelo cultivars and landraces using multivariate analysis methods. A total of 60 accessions from six provinces were collected, including some representatives of registered cultivars. Twenty one morphological characters were subjected to cluster analysis and principal component analysis. Results showed that two major clusters were formed, in which each group was characterized by combination of distinctive morphological features leading to recognition of two cultivar groups. Based on the fact that the morphology of individuals from intensively cultivated orchards showed similar level of variability to those from sporadically distributed areas, there was strong indication that the morphological variation has genetic background.

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“…With the advancement of next-generation sequencing and genome-wide association analysis, several genes involved in pod dehiscence have been discovered, and a variety of mutations underlying shattering resistance have been determined in many crops and their wild relatives [52,149]. In Brassica, efforts to improve shattering resistance include interfering with the dehiscence process via manipulating its molecular and hormonal control pathways [150,151], and generating transgenic lines with pod-shattering resistance [81,82].…”

Section: Efforts To Control Pod Shatteringmentioning

confidence: 99%

Pod Shattering: A Homologous Series of Variation Underlying Domestication and an Avenue for Crop Improvement

Ogutcen¹,

Pandey²,

Khan³

et al. 2018

Preprint

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In wild habitats, fruit dehiscence is a critical strategy for seed dispersal; however, in cultivated crops it is one of the major sources of yield loss. Therefore, indehiscence of fruits, pods, etc., was likely to be one of the first traits strongly selected in crop domestication. Even with the historical selection against dehiscence in early domesticates, it is a trait still targeted in many breeding programs, particularly in minor or underutilized crops. Here, we review of this trait in pulse (grain legume) crops, which are of growing importance as a source of protein in human and livestock diets, and which have received less attention iii) the molecular pathways underlying this important trait, iv) an overview of the extent of crop losses due to shattering, and the effects of environmental factors on shattering, and, v) efforts to reduce shattering in crops. While our focus is mainly pulse crops, we also included comparisons to crucifers and cereals because there is extensive research on shattering in these taxa.

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Seed Dispersal and Crop Domestication: Shattering, Germination and Seasonality in Evolution under Cultivation

Cited by 129 publications

References 195 publications

KNOX Protein OSH15 Induces Grain Shattering by Repressing Lignin Biosynthesis Genes

KNOX Protein OSH15 Induces Grain Shattering by Repressing Lignin Biosynthesis Genes

ASSESSMENT OF TAXONOMIC AFFINITY OF INDONESIAN PUMMELO (<i>CITRUS MAXIMA</i> (BURM.) MERR.) BASED ON MORPHOLOGICAL CHARACTERS

Pod Shattering: A Homologous Series of Variation Underlying Domestication and an Avenue for Crop Improvement

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