Insights into the molecular control of cross‑incompatibility in Zea mays Lu, Yongxian Moran Lauter, Adrienne Scott, M. Paul Makkena, Srilakshmi Scott, M. Paul Evans, Matthew
dc.contributor.department Agronomy 2020-09-14T14:13:08.000 2021-02-24T19:25:26Z 2021-02-24T19:25:26Z 2020-01-01
dc.description.abstract <p>Gametophytic cross-incompatibility systems in corn have been the subject of genetic studies for more than a century. They have tremendous economic potential as a genetic mechanism for controlling fertilization without controlling pollination. Three major genetically distinct and functionally equivalent cross-incompatibility systems exist in <em>Zea mays</em>: <em>Ga1</em>, <em>Tcb1</em>, and <em>Ga2</em>. All three confer reproductive isolation between maize or teosinte varieties with different haplotypes at any one locus. These loci confer genetically separable functions to the silk and pollen: a female function that allows the silk to block fertilization by non-self-type pollen and a male function that overcomes the block of the female function from the same locus. Identification of some of these genes has shed light on the reproductive isolation they confer. The identification of both male and female factors as pectin methylesterases reveals the importance of pectin methylesterase activity in controlling the decision between pollen acceptance versus rejection, possibly by regulating the degree of methylesterification of the pollen tube cell wall. The appropriate level and spatial distribution of pectin methylesterification is critical for pollen tube growth and is affected by both pectin methylesterases and pectin methylesterase inhibitors. We present a molecular model that explains how cross-incompatibility systems may function that can be tested in <em>Zea</em> and uncharacterized cross-incompatibility systems. Molecular characterization of these loci in conjunction with further refinement of the underlying molecular and cellular mechanisms will allow researchers to bring new and powerful tools to bear on understanding reproductive isolation in <em>Zea mays</em> and related species.</p>
dc.description.comments <p>This article is published as Lu, Yongxian, Adrienne N. Moran Lauter, Srilakshmi Makkena, M. Paul Scott, and Matthew MS Evans. "Insights into the molecular control of cross-incompatibility in Zea mays." <em>Plant Reproduction</em> (2020). doi: <a href="">10.1007/s00497-020-00394-w</a>.</p>
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dc.identifier archive/
dc.identifier.articleid 1729
dc.identifier.contextkey 19390180
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath agron_pubs/680
dc.language.iso en
dc.source.bitstream archive/|||Sat Jan 15 01:29:07 UTC 2022
dc.source.uri 10.1007/s00497-020-00394-w
dc.subject.disciplines Agriculture
dc.subject.disciplines Agronomy and Crop Sciences
dc.subject.disciplines Plant Breeding and Genetics
dc.subject.keywords Cross-incompatibility
dc.subject.keywords Pectin methylesterase
dc.subject.keywords Zea mays
dc.subject.keywords Pollen
dc.subject.keywords Pistil
dc.subject.keywords Reproductive isolation
dc.title Insights into the molecular control of cross‑incompatibility in Zea mays
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 97acee5f-1291-4c27-8929-a8e1617c411d
relation.isOrgUnitOfPublication fdd5c06c-bdbe-469c-a38e-51e664fece7a
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