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I am all ears: Maximize maize doubled haploid success by promoting axillary branch elongation
Year:
2020
Source of publication :
Plant Direct
Authors :
Goldshmidt, Alexander
;
.
Volume :
Co-Authors:

Miin-Feng Wu  - Bayer U.S. - Crop Science Chesterfield MO USA.

Daniel Ovadya  - Bayer U.S. - Crop Science Woodland CA USA.

Huachun Larue -  Bayer U.S. - Crop Science Chesterfield MO USA.

Facilitators :
From page:
0
To page:
0
(
Total pages:
1
)
Abstract:

The maize doubled haploid (DH) technology plays an important role in accelerating breeding genetic gain. One major challenge in fully leveraging the potential of DH technology to accelerate genetic gain is obtaining a consistent seed return from haploid (DH0) plants after chromosome doubling. Here we demonstrated that DH0 seed production can be increased by increasing the number of mature axillary female inflorescences (ears) at anthesis. To determine the maximum capacity of a maize plant to develop ears, we first characterized the developmental progression of every axillary meristem. We found that all axillary meristems developed to a similar developmental stage before the reproductive transition of the shoot apical meristem (SAM). Upon reproductive transition of the SAM, all axillary meristems are released for reproductive development into ears in a developmental gradient reflective on their positions along the main stem. However, under most circumstances only the top one or two ears can generate silks at anthesis. We found that applying the GA inhibitor paclobutrazol (PAC) during the early reproductive transition of axillary meristems increased the number of silking ears at anthesis, leading to increased success of self-pollination and seed production. These results provide a blueprint to improve DH efficiency and demonstrate the potential of breeding innovation through understanding crops' developmental processes.

Note:
Related Files :
axillary branches
colchicine
doubled haploid
maize
Plant growth regulator
Show More
Related Content
More details
DOI :
10.1002/pld3.226
Article number:
0
Affiliations:
Database:
PubMed
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
47969
Last updated date:
02/03/2022 17:27
Creation date:
27/05/2020 16:37
You may also be interested in
Scientific Publication
I am all ears: Maximize maize doubled haploid success by promoting axillary branch elongation

Miin-Feng Wu  - Bayer U.S. - Crop Science Chesterfield MO USA.

Daniel Ovadya  - Bayer U.S. - Crop Science Woodland CA USA.

Huachun Larue -  Bayer U.S. - Crop Science Chesterfield MO USA.

I am all ears: Maximize maize doubled haploid success by promoting axillary branch elongation

The maize doubled haploid (DH) technology plays an important role in accelerating breeding genetic gain. One major challenge in fully leveraging the potential of DH technology to accelerate genetic gain is obtaining a consistent seed return from haploid (DH0) plants after chromosome doubling. Here we demonstrated that DH0 seed production can be increased by increasing the number of mature axillary female inflorescences (ears) at anthesis. To determine the maximum capacity of a maize plant to develop ears, we first characterized the developmental progression of every axillary meristem. We found that all axillary meristems developed to a similar developmental stage before the reproductive transition of the shoot apical meristem (SAM). Upon reproductive transition of the SAM, all axillary meristems are released for reproductive development into ears in a developmental gradient reflective on their positions along the main stem. However, under most circumstances only the top one or two ears can generate silks at anthesis. We found that applying the GA inhibitor paclobutrazol (PAC) during the early reproductive transition of axillary meristems increased the number of silking ears at anthesis, leading to increased success of self-pollination and seed production. These results provide a blueprint to improve DH efficiency and demonstrate the potential of breeding innovation through understanding crops' developmental processes.

Scientific Publication
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