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The Royal Vetrinary and Agricultural University (Denmark) (1999)

The effect of some major genes on bird damage earliness and yield of pearl millet composite ICMV 155

Abraha, N

Titre : The effect of some major genes on bird damage earliness and yield of pearl millet composite ICMV 155

Auteur : Abraha, N

Etablissement de soutenance : The Royal Vetrinary and Agricultural University (Denmark).

Grade : Master of Science 1999

Résumé partiel
Studieh were made to nsccrtn n tlic effects of b ;lckcross trnnrfcr of the I,, genc for pliotoperiod-insensitive early flowering on phenology and agronomic performance for grain yield and stover yield in pearl millet. Simultoneoualy, the effects of backcross transfer of long panicle bristling on grain and stover yield potcrit nl and vulnerability of grain to bird ddniage was also assessed. Moht of the genotypes were affec ed by extended day length, but ICMV 155 (,,el was the Ieart nflected : this ecirly version of ICMV 1.55 rcnchcd 75(1 flowering in 49 day ? under normal day Icngtlis and 51 day\ under extended day lengths. Tlie homozygous r.1 gene conditioned the crop to rnature I I to 14 days earlicr th ;in its irogrn c counter parts under norri1 ;rl and extended day Iengtlis. 111 this experinlent, it was observed that the early genotype (I,,I,,) bloomed the earliert among ttic nine genotypes in hoth riorrnal and extended day lc lfths. Selectlo i of sou ng d ;ltec allti grnotypcs liad also ntliienccd for days required for lliis ch ;ir;ictcr. l !hr of thc e,o, gene con produce pearl millet tho1 if photopcrio i iisens ti\e tli ;it car1 grow iitid motiire at Ihc liortes pors hlc duration. Thus in conihin ;i ori with oprii i ;ll honing tlatcs ;uid soil Se tility rate, llie genolype can he useful ;is ;I me,ln. ; of drou:ht, pcht ;iritl tl he,lsc csc ;rpe mechnnis n in ;ireas where n prcdorninnnlly ra n-fcd crop is grown iind favourable noisturc regime ih limitcd. Howebel., th s early gc iot !pe hati lou total dl- ! liintter production ah comparcd to other genotype. ;. Wlicn the B istled genotype wa. ; evaluated, it perfornictl ucll in rehistiny the bird damage, i.e.. the Bristling gene (Rr) expressed well in protecting from h rd dlrniage. It war alro compar ;ible with two geriotypes which had less da nnge because the f rhl kns a late vxicty with El genc and the second gcnotype was with the 1 ;rter-tlo\\erm$ genotype witli tlic brown mid-rib gene (h lrr), which had lodging prohlcnlr

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