Combining ability for yield and plant phenology in plantain-derived populations |
| |
Authors: | A Tenkouano R Ortiz D Vuylsteke |
| |
Institution: | (1) Carolyn House, IITA c/o Lambourn and Co., 26 Dingwall Road, Croydon, CR9 3EE, U.K. (author for correspondence);(2) Department of Agricultural Sciences, The Royal Veterinary and Agricultural University (KVL), 40 Thorvaldsensvej, DK-1871 Frederiksberg C Copenhagen, Denmark |
| |
Abstract: | Genetic enhancement of Musa spp. has aimed at producing hybrids with high yield, short stature, fast crop cycling, and disease
resistance through interspecific and interploidy crosses. Progeny testing for parental selection has seldom been carried out
in Musa and little is known on combining ability and heterosis in this species. A 5 × 5 factorial mating design was used to
estimate components of phenotypic variance in 4 x-2 x hybrid populations and to determine the combining ability of their progenitors
for yield and associated traits. General combining ability was much greater than specific combining ability for these traits,
and, therefore, only little recombinative heterosis could be expected upon crossing. Thus, the 4 x-2 x breeding scheme should
aim to accumulate favourable alleles in 4 x and 2 x clones through recurrent selection. Such clones could be used per se or
in crosses aimed at restoring the seedlessness character in the progeny due to female sterility in a triploid background.
This revised version was published online in August 2006 with corrections to the Cover Date. |
| |
Keywords: | Musa spp 4 x-2 x breeding scheme parental selection breeding value nonallelic interactions crop cycling efficiency |
本文献已被 SpringerLink 等数据库收录! |
|