Featured Research

from universities, journals, and other organizations

Divergent Mating Systems And Parental Conflict As A Barrier To Hybridization In Flowering Plants

Date:
August 15, 2005
Source:
University of Chicago Press Journals
Summary:
A new study in the September issue of The American Naturalist argues that with increased self-fertilization, parental conflict decreases. Consequently, parents from frequently selfing groups should be competitively inferior with respect to this parental conflict.

Sexual reproduction can be thought of as a cooperative process in whichtwo individuals come together to produce a new individual. It can alsobe viewed as a process in which two parties with differing interests,investment, and background interact to produce a new individual. Fromthe former perspective, parental interests are unified (both wish toproduce vigorous offspring), while the latter suggests possibleconflict. This conflict can occur before or after fertilization. Beforefertilization, the mother has an interest in picking the best suitedfather from a larger pool, while all fathers have an interest in beingpicked. After fertilization, fathers have an interest in maximizingmaternal investment in their progeny, while mothers will have aninterest in carefully partitioning resources among progeny to maximizetheir combined success.

A new study in the September issue of The American Naturalist arguesthat with increased self-fertilization, parental conflict decreases.Consequently, parents from frequently selfing groups should becompetitively inferior with respect to this parental conflict. YanivBrandvain and David Haig examine crosses between selfing andoutcrossing pairs and find that, in most cases, there are pre- andpost-zygotic symptoms of outcrossers being "stronger" than selfers withregard to parental conflict. They contend that this competitiveimbalance can explain a common pattern of unilateral incompatibility,in which pollen from self-incompatible populations can successfullyfertilize ovules of self-compatible individuals, but the reciprocalcross fails. Since both pre- and post-zygotic consequences of thisimbalanced conflict can perturb successful fertilization anddevelopment, they provide barriers to hybridization and may facilitatespeciation.

###

Sponsored by the AmericanSociety of Naturalists, The American Naturalist is a leading journal inthe fields of ecology and evolutionary biology and animal behavior. Formore information, please see our website: www.journals.uchicago.edu/AN

Yaniv Brandvain and David Haig, "Divergent mating systems andparental conflict as a barrier to hybridization in flowering plants"166:3 September 2005.


Story Source:

The above story is based on materials provided by University of Chicago Press Journals. Note: Materials may be edited for content and length.


Cite This Page:

University of Chicago Press Journals. "Divergent Mating Systems And Parental Conflict As A Barrier To Hybridization In Flowering Plants." ScienceDaily. ScienceDaily, 15 August 2005. <www.sciencedaily.com/releases/2005/08/050814164038.htm>.
University of Chicago Press Journals. (2005, August 15). Divergent Mating Systems And Parental Conflict As A Barrier To Hybridization In Flowering Plants. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2005/08/050814164038.htm
University of Chicago Press Journals. "Divergent Mating Systems And Parental Conflict As A Barrier To Hybridization In Flowering Plants." ScienceDaily. www.sciencedaily.com/releases/2005/08/050814164038.htm (accessed October 21, 2014).

Share This



More Plants & Animals News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

'Cadaver Dog' Sniffs out Human Remains

'Cadaver Dog' Sniffs out Human Remains

AP (Oct. 21, 2014) Where's a body buried? Buster's nose can often tell you. He's a cadaver dog, specially trained to find human remains and increasingly being used by law enforcement and accepted in courts. These dogs are helping solve even decades-old mysteries. (Oct. 21) Video provided by AP
Powered by NewsLook.com
White Lion Cubs Born in Belgrade Zoo

White Lion Cubs Born in Belgrade Zoo

AFP (Oct. 20, 2014) Two white lion cubs, an extremely rare subspecies of the African lion, were recently born at Belgrade Zoo. They are being bottle fed by zoo keepers after they were rejected by their mother after birth. Duration: 00:42 Video provided by AFP
Powered by NewsLook.com
Traditional Farming Methods Gaining Ground in Mali

Traditional Farming Methods Gaining Ground in Mali

AFP (Oct. 20, 2014) He is leading a one man agricultural revolution in Mali - Oumar Diatabe uses traditional farming methods to get the most out of his land and is teaching others across the country how to do the same. Duration: 01:44 Video provided by AFP
Powered by NewsLook.com
Goliath Spider Will Give You Nightmares

Goliath Spider Will Give You Nightmares

Buzz60 (Oct. 20, 2014) An entomologist stumbled upon a South American Goliath Birdeater. With a name like that, you know it's a terrifying creepy crawler. Sean Dowling (@SeanDowlingTV) has the details. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins