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Seed parent breeding efficiency of three diverse cytoplasmic-nuclear male-sterility systems in pearl millet

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Relation http://oar.icrisat.org/5045/
http://dx.doi.org/10.1007/s10681-008-9765-7
 
Title Seed parent breeding efficiency of three diverse
cytoplasmic-nuclear male-sterility systems in pearl millet
 
Creator Rai, K N
Khairwal, I S
Dangaria, C J
Singh, A K
Rao, A S
 
Subject Millets
 
Description Pearl millet (Pennisetum glaucum (L.) R.
Br.) hybrids, grown widely in India and to some
extent in the US, are all based on an A1 CMS source,
leaving the pearl millet hybrids vulnerable to potential
disease or insect pest epidemics. A comparison of
this CMS system with two additional CMS systems
(A4 and A5) in the present study based on isonuclear
A-lines (seed parents) and their isonuclear hybrids
showed that A-lines with the A4 cytoplasm had much
fewer pollen shedders and much reduced selfed seed
set in visually assessed non-shedding plants as compared
to those with the A1 cytoplasm. A-lines with the
A5 cytoplasm had neither any pollen shedders nor did
they set any seed when selfed. This showed that the
A5 CMS system imparts complete and most stable
male sterility, followed by the A4 and A1 CMS systems.
The frequency of maintainers, averaged across
a diverse range of 26 populations, was highest for the A5 CMS system (98%), followed by the A4 (59%) and
the A1 (34%) system indicating the greatest prospects
for genetic diversiWcation of A-lines lies with the A5
cytoplasm, and the least with the A1 cytoplasm. Mean
grain yield of hybrids with the A1 cytoplasm was 5%
more than the A4-system hybrids, while there was no
diVerence between the mean grain yield of hybrids
based on A1 and A5 CMS systems. Based on these
results, it is suggested that seed parents breeding
eYciency will be the greatest with the A5 CMS system,
followed by the A4 CMS system, and least with
the currently commercial A1 CMS system.
 
Publisher Springer
 
Date 2009
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/5045/1/Euphytica165_3_495-507_2008.pdf
Rai, K N and Khairwal, I S and Dangaria, C J and Singh, A K and Rao, A S (2009) Seed parent breeding efficiency of three diverse cytoplasmic-nuclear male-sterility systems in pearl millet. Euphytica, 165 (3). pp. 495-507. ISSN 0014-2336