Reference "Comparative analysis of QTLs affecting domestication traits between two domesticated x wild pearl millet ( Pennisetum glaucum L., Poaceae) crosses"

Reference ID

8257

Title

Comparative analysis of QTLs affecting domestication traits between two domesticated x wild pearl millet ( Pennisetum glaucum L., Poaceae) crosses

Source

Theoretical and applied genetics, 2002, vol. 104, pp. 965-975

Authors (7)

Poncet-V	Martel-E
Allouis-S	Devos-M
Lamy-F	Sarr-A
Robert-T

Abstract

Comparative mapping of Quantitative trait loci (QTLs) involved in domestication
of adaptative syndrome traits of pearl millet was realized at the intra-specific
level using two F(2) populations derived from domesticated ( Pennisetum glaucum
ssp. glaucum) x wild ( Pennisetum glaucum ssp. monodii) crosses. The two
domesticated parents analyzed differ in their geographical origins, agronomic
characteristics and life cycles. In both populations, two regions of the genome
were identified on linkage groups 6 and 7, that controlled most of the key
morphological differences. The importance of these two linkage groups reveals
their central role both in the developmental control of spikelet structure and
in the domestication process of this crop. In contrast, QTLs involved in traits
that are components of yield and measure differences in resource allocation
(such as the shape of the spike, the number of spikes per plant and plant
height) show a low level of correspondence among our two crosses. The results of
the comparative mapping between cereals, although preliminary, reveal that genes
involved in seed-shattering could correspond in maize, rice and sorghum. The
evolutionary significance of our results, and especially the relationships
between genome organization and cereal domestication, are discussed. The
potential use of these results in pearl millet genetic-resources enhancement are
presented.