RE: HTD: Maternal Inheritence

What this shows is that different mother plants have a differenc in how the seeds germinate. This could be nucleus genetics or cytoplasmic inheritence. 
To test how it is inherited you need to check the next generation, keeping track of which seedlings have which parent. If the seedlings with CS as pod parent have poorer germination then the seedlings with CS as pollen parent then you have evidence in favour of cytoplasm. If there are plants in both groups with easy and hard germination , then the evidence would be in favor of nucleus genetics.

Regards,

Chuck Chapman


>Date: Thu, 17 Mar 2005 13:23:54 -0500
>From: Linda Mann <lmann@volfirst.net>
>Subject: [iris] HYB: maternal inheritance
>
>Thought you folks might find this interesting -
>
>summer 2003 I did reverse crosses between PINK FORMAL and CELEBRATION
>SONG, got one pod each containing around 50 seeds.
>
>The seeds were handled the same way, but kept separate.
>
>Fall/winter 2004
>around 19 seedlings germinated from PINK FORMAL X CSONG (around 17
>currently surviving)
>around 2 germinated from CSONG X PINK FORMAL - both died.
>
>Fall/winter 2005
>one additional seedling up from PINK FORMAL X CSONG last summer
>around 15 up so far from CSONG X PINK FORMAL.
>
>Looks like maternal plant not only affects vegetative growth, but also
>can influence seed dormancy & the number/duration of chilling cycles
>required to break it.
>
>I'm in a rush, so am guessing at numbers.  If anybody wants to know, I
>will dig out my notes from last year and post actual data.
>
>- --
>Linda Mann east Tennessee USA zone 7/8


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