Skip to Content.
Sympa Menu

nafex - Re: [nafex] self fertile pears?

nafex@lists.ibiblio.org

Subject: North American Fruit Explorers mailing list at ibiblio

List archive

Chronological Thread  
  • From: Michael Dossett <phainopepla@yahoo.com>
  • To: mailing list at ibiblio - Northamerican Allied Fruit Experimenters <nafex@lists.ibiblio.org>, Henry <treehugger53ah@yahoo.com>
  • Subject: Re: [nafex] self fertile pears?
  • Date: Thu, 13 Oct 2016 20:48:41 +0000 (UTC)

In pears the flowers will produce both male and female parts that are viable
- the mechanism is a type of self-incompatibility where the pollen germinates
and grows about a third of the way down the style before the RNAs are
degraded by enzymes in the style if they contain the same genetic allele as
the pollen.  Sometimes this can be overcome by temperatures that allow pollen
tube growth to occur more quickly and reach the ovules prior to degradation.  
If you are consistently getting fruit set when none existed before then there
really are only a couple of possible scenarios. 1. There is pollen from
somewhere that you aren't aware of.  Honeybees will travel a long distance.  
From my conversations with beekeepers here, I've been told that any pollen
source within a radius of ~5 miles can allow pollination (obviously, closer
is better).  2. Chimeral mutation (aka bud sport) on a limb somewhere that
has allowed different alleles to be produced thereby providing compatible
pollen on the same variety of tree.  This isn't completely unheard of but it
is somewhat rare.
Michael Michael Dossett Mission, British Columbia www.Mdossettphoto.com
phainopepla@yahoo.com

On Wednesday, October 12, 2016 6:33 PM, Jim Fruth <jimfruth@charter.net>
wrote:


My pear flowers seem to have both pistle and stamens.


-----Original Message-----
From: Henry
Sent: Wednesday, October 12, 2016 8:17 AM
To: mailing list at ibiblio - Northamerican Allied Fruit Experimenters
Subject: Re: [nafex] self fertile pears?

The purpose of a plant seems to be to reproduce itself.

I have heard that some plants "get frustrated" after years of not producing
seed and "fix" the problem.

We are not allowed to grow the "sterile" forms of the invasive buckthorn
here in Minnesota because they tend to revert to seed production when they
get "old."

Some isolated "female" dioecious plants will grow a branch of "male" flowers
so as to be able to make viable seeds.

I don't know what the pears might be doing to pull this off.

--Henry Fieldseth

__________________
nafex mailing list
nafex@lists.ibiblio.org
Northamerican Allied Fruit Experimenters
subscribe/unsubscribe|user config|list info:
http://lists.ibiblio.org/mailman/listinfo/nafex



>From oowonbs@netscape.net Fri Oct 14 01:06:52 2016
Return-Path: <oowonbs@netscape.net>
X-Original-To: nafex@lists.ibiblio.org
Delivered-To: nafex@lists.ibiblio.org
Received: by lists.ibiblio.org (Postfix, from userid 20217)
id 6D56E182B; Fri, 14 Oct 2016 01:06:52 -0400 (EDT)
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on
mailman1.ibiblio.org
X-Spam-Level:
X-Spam-Status: No, score=-1.4 required=5.0 tests�YES_00,DKIM_SIGNED,
DKIM_VALID, HTML_MESSAGE, RCVD_IN_DNSWL_NONE,
RCVD_IN_SORBS_SPAM autolearn=no version=3.3.1
Received: from omr-a016e.mx.aol.com (omr-a016e.mx.aol.com [204.29.186.65])
by lists.ibiblio.org (Postfix) with ESMTP id 1F298B89
for <nafex@lists.ibiblio.org>; Fri, 14 Oct 2016 01:06:49 -0400 (EDT)
Received: from mtaomg-mbc01.mx.aol.com (mtaomg-mbc01.mx.aol.com
[172.26.221.143])
by omr-a016e.mx.aol.com (Outbound Mail Relay) with ESMTP id
136E23800083
for <nafex@lists.ibiblio.org>; Fri, 14 Oct 2016 01:06:48 -0400 (EDT)
Received: from core-abc05a.mail.aol.com (core-abc05.mail.aol.com
[172.27.9.15])
by mtaomg-mbc01.mx.aol.com (OMAG/Core Interface) with ESMTP id
D958138000082
for <nafex@lists.ibiblio.org>; Fri, 14 Oct 2016 01:06:47 -0400 (EDT)
Received: from 50.152.145.223 by webprd-m93.mail.aol.com (10.74.71.96) with
HTTP (WebMailUI); Fri, 14 Oct 2016 01:06:47 -0400
Date: Fri, 14 Oct 2016 01:06:47 -0400
From: Oowonbs <oowonbs@netscape.net>
To: nafex@lists.ibiblio.org
Message-Id: <157c195e0de-2e6a-3159@webprd-m93.mail.aol.com>
In-Reply-To: <mailman.1999.1476391894.1758.nafex@lists.ibiblio.org>
References: <mailman.1999.1476391894.1758.nafex@lists.ibiblio.org>
MIME-Version: 1.0
X-MB-Message-Source: WebUI
X-MB-Message-Type: User
X-Mailer: JAS NEW_PHONE
X-Originating-IP: [50.152.145.223]
x-aol-global-disposition: G
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.netscape.net;
s 150623; t76421608;
bh=nsM4h9UDDeHmDYyYOEoKI7+VbE/RpqbJn/tjumGuXB0=;
h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type;
b=jEWeEqbmdwzUXDqSM+Uw9Xdqq1vXNuO4IPcnkq5DQhAFFe1mce77j+CIUO9PMN5/8
0z20JWUkYxHegX6fx/0FJPn5twvDC7CkltCzC5yFNVLufV7o5rM7Yx7LdF7lnhupkr
76E2qgnwWarCA2Qy2eqG2jopS/I9m436rh2THxegx-aol-sid:
3039ac1add8f580067e7104d
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-Content-Filtered-By: Mailman/MimeDel 2.1.20
Subject: Re: [nafex] nafex self fertile pears?
X-BeenThere: nafex@lists.ibiblio.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: mailing list at ibiblio - Northamerican Allied Fruit Experimenters
<nafex.lists.ibiblio.org>
List-Unsubscribe: <http://lists.ibiblio.org/mailman/options/nafex>,
<mailto:nafex-request@lists.ibiblio.org?subject=unsubscribe>
List-Archive: <https://lists.ibiblio.org/sympa/arc/nafex/>
List-Post: <mailto:nafex@lists.ibiblio.org>
List-Help: <mailto:sympa@lists.ibiblio.org?subject=HELP>
List-Subscribe: <http://lists.ibiblio.org/mailman/listinfo/nafex>,
<mailto:nafex-request@lists.ibiblio.org?subject=subscribe>
X-List-Received-Date: Fri, 14 Oct 2016 05:06:52 -0000

Can honeybees pollinate self-fertile pears? Tomatoes are seld-fertile but
honeybees are unable for the.most part - bumblebees are required. Tomatoes, I
understand, have 3 sets of genes and may occasionally revert to a different
set.

5 miles for a honeybee is possible, but most gain is lost around 4 miles.
They use up almost all they collect. While they instinctually do not over
forage too close to home, (wasted trips to over-foraged flowers,) a mile is a
preferred maximum, give or take, when possible.

BillSF9c
- near San Francisco, USDA 10a
>From abb7@lehigh.edu Fri Oct 14 08:08:09 2016
Return-Path: <abb7@lehigh.edu>
X-Original-To: nafex@lists.ibiblio.org
Delivered-To: nafex@lists.ibiblio.org
Received: by lists.ibiblio.org (Postfix, from userid 20217)
id 2797FB7C; Fri, 14 Oct 2016 08:08:09 -0400 (EDT)
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on
mailman1.ibiblio.org
X-Spam-Level:
X-Spam-Status: No, score=-1.9 required=5.0 tests�YES_00,RCVD_IN_DNSWL_NONE
autolearn=ham version=3.3.1
Received: from rain4.cc.lehigh.edu (rain4.cc.lehigh.edu [128.180.3.218])
by lists.ibiblio.org (Postfix) with ESMTP id 473F2B6E
for <nafex@lists.ibiblio.org>; Fri, 14 Oct 2016 08:08:06 -0400 (EDT)
Received: from webmail.lehigh.edu (rain4.cc.lehigh.edu [128.180.3.218])
(Authenticated sender: abb7)
by rain4.cc.lehigh.edu (Postfix) with ESMTPSA id BAC66503C283
for <nafex@lists.ibiblio.org>; Fri, 14 Oct 2016 08:08:06 -0400 (EDT)
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII;
format=flowed
Content-Transfer-Encoding: 7bit
Date: Fri, 14 Oct 2016 08:08:06 -0400
From: "Alexander B. Brands ( Faculty - Biological Sciences )"
<abb7@lehigh.edu>
To: nafex@lists.ibiblio.org
Message-ID: <21431af8c05155d1811c162026639e34@lehigh.edu>
X-Sender: abb7@lehigh.edu
User-Agent: Roundcube Webmail/1.1.5
X-RoundCube-Server: 128.180.3.218
X-Virus-Scanned: clamav-milter 0.99.2 at rain4.CC.lehigh.EDU
X-Virus-Status: Clean
Subject: Re: [nafex] self fertile pears?
X-BeenThere: nafex@lists.ibiblio.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: mailing list at ibiblio - Northamerican Allied Fruit Experimenters
<nafex.lists.ibiblio.org>
List-Unsubscribe: <http://lists.ibiblio.org/mailman/options/nafex>,
<mailto:nafex-request@lists.ibiblio.org?subject=unsubscribe>
List-Archive: <https://lists.ibiblio.org/sympa/arc/nafex/>
List-Post: <mailto:nafex@lists.ibiblio.org>
List-Help: <mailto:sympa@lists.ibiblio.org?subject=HELP>
List-Subscribe: <http://lists.ibiblio.org/mailman/listinfo/nafex>,
<mailto:nafex-request@lists.ibiblio.org?subject=subscribe>
X-List-Received-Date: Fri, 14 Oct 2016 12:08:09 -0000



Another possibility is that the rootstock has sent out a shoot from
below the graft union, and started flowering, making a 2 in 1 tree.




Archive powered by MHonArc 2.6.24.

Top of Page