Parallel domestication of the Shattering1 genes in cereals

Lin, Zhongwei; Li, Xianran; Shannon, Laura M.; Yeh, Cheng‐Ting; Wang, Ming L.; Bai, Guihua; Peng, Zhao; Li, Jiarui; Trick, Harold N.; Clemente, Thomas E.; Doebley, John; Schnable, Patrick S.; Tuinstra, Mitchell R.; Tesso, Tesfaye; White, Frank F.; Yu, Jianming

doi:10.1038/ng.2281

Cited by 402 publications

(410 citation statements)

References 31 publications

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“…These results suggest that these flowering time QTLs are stably expressed in intraspecies and interspecies populations. The high QTL correspondence indicates that this maize‐teosinte BC 2 S 3 population is a representative and powerful tool to assess the genetic architectures of complex traits, as indicated in previous studies that used this population (Hung et al ., 2012; Lin et al ., 2012; Wills et al ., 2013; Lang et al ., 2014; Huang et al ., 2015). …”

Section: Discussionmentioning

confidence: 99%

The genetic architecture of leaf number and its genetic relationship to flowering time in maize

Wang

Zhang

et al. 2015

New Phytologist

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Summary The number of leaves and their distributions on plants are critical factors determining plant architecture in maize (Zea mays), and leaf number is frequently used as a measure of flowering time, a trait that is key to local environmental adaptation.Here, using a large set of 866 maize‐teosinte BC 2S3 recombinant inbred lines genotyped by using 19 838 single nucleotide polymorphism markers, we conducted a comprehensive genetic dissection to assess the genetic architecture of leaf number and its genetic relationship to flowering time.We demonstrated that the two components of total leaf number, the number of leaves above (LA) and below (LB) the primary ear, were under relatively independent genetic control and might be subject to differential directional selection during maize domestication and improvement. Furthermore, we revealed that flowering time and leaf number are commonly regulated at a moderate level. The pleiotropy of the genes ZCN8, dlf1 and ZmCCT on leaf number and flowering time were validated by near‐isogenic line analysis. Through fine mapping, qLA1‐1, a major‐effect locus that specifically affects LA, was delimited to a region with severe recombination suppression derived from teosinte.This study provides important insights into the genetic basis of traits affecting plant architecture and adaptation. The genetic independence of LA from LB enables the optimization of leaf number for ideal plant architecture breeding in maize.

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Section: Discussionmentioning

confidence: 99%

The genetic architecture of leaf number and its genetic relationship to flowering time in maize

Wang

Zhang

et al. 2015

New Phytologist

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“…Independence of a major domestication locus from its genetic background was also found by Gu et al (36) for the qSD12 locus that controls ∼50% of the variation in seed dormancy in rice, whereas minor loci showed multiple epistatic interactions. Similar genetic architectures exist for vegetative architecture in maize and foxtail millet (26,37) and shattering in sorghum, wheat, and rice (35,38,39).…”

Section: Epistasis Affects Domestication and Crop Improvement Traitsmentioning

confidence: 89%

Beyond the single gene: How epistasis and gene-by-environment effects influence crop domestication

Doust

Lukens

Olsen

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

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Domestication is a multifaceted evolutionary process, involving changes in individual genes, genetic interactions, and emergent phenotypes. There has been extensive discussion of the phenotypic characteristics of plant domestication, and recent research has started to identify the specific genes and mutational mechanisms that control domestication traits. However, there is an apparent disconnect between the simple genetic architecture described for many crop domestication traits, which should facilitate rapid phenotypic change under selection, and the slow rate of change reported from the archeobotanical record. A possible explanation involves the middle ground between individual genetic changes and their expression during development, where gene-by-gene (epistatic) and gene-by-environment interactions can modify the expression of phenotypes and opportunities for selection. These aspects of genetic architecture have the potential to significantly slow the speed of phenotypic evolution during crop domestication and improvement. Here we examine whether epistatic and gene-byenvironment interactions have shaped how domestication traits have evolved. We review available evidence from the literature, and we analyze two domestication-related traits, shattering and flowering time, in a mapping population derived from a cross between domesticated foxtail millet and its wild progenitor. We find that compared with wild progenitor alleles, those favored during domestication often have large phenotypic effects and are relatively insensitive to genetic background and environmental effects. Consistent selection should thus be able to rapidly change traits during domestication. We conclude that if phenotypic evolution was slow during crop domestication, this is more likely due to cultural or historical factors than epistatic or environmental constraints.QTL | genotype-by-environment interactions | G × E | Setaria | domestication syndrome

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“…Specifically, shattering in cereal crops occurs in a layer of specialized cells, collectively called the abscission zone, between pedicel and lemma [72]. Studies aimed to understand the molecular mechanisms of shattering in cereal crops have been mainly focused on rice, wheat, and sorghum [14,15,17,19].…”

Section: A Shattering In Cereal Cropsmentioning

confidence: 99%

“…In sorghum, YABBY transcription factor Shattering1 (Sh1) was found to be responsible for shattering, and orthologs of this gene were found in other cereals including rice and maize [19]. Shattering in sorghum was initially thought to be regulated by a single gene, but another gene was found to control shattering in wild sorghum (Sorghum propinquum).…”

Section: A Shattering In Cereal Cropsmentioning

confidence: 99%

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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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Parallel domestication of the Shattering1 genes in cereals

Cited by 402 publications

References 31 publications

The genetic architecture of leaf number and its genetic relationship to flowering time in maize

The genetic architecture of leaf number and its genetic relationship to flowering time in maize

Beyond the single gene: How epistasis and gene-by-environment effects influence crop domestication

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

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