Heterosis and combining ability in Brassica rapa populations for biomass production
Presently there is an increasing interest in Europe to use plant biomass for biogas production. Winter B. rapa is a potential biomass crop, mainly because of its high early biomass production and could be used as a pre-crop harvested early in the year for biogas and followed by a second crop. This study was therefore conducted to estimate heterosis and combining ability for biomass yield and other related traits among inter-population full-sibs of winter B. rapa. A half-diallel without reciprocals was conducted among 15 populations of winter B. rapa after which the parents and their 105 full-sibs (FS) produced were evaluated at two locations for days to flowering (DTF), fresh biomass yield (FBY), dry matter content (DMC), and dry biomass yield (DBY).Analysis of variance (ANOVA) showed significant differences among locations, entries and crosses for all traits except DTF. The expression of the various traits studied seems to be controlled by both general combining ability (GCA) and specific combining ability (SCA). Percent mid parent heterosis (MPH ％) and percent high parent heterosis (HPH ％) for DBY ranged from-14％ to 50％ with a mean of 13％ and-22％ to 45％ with a mean of 3％, respectively. From all 105 FS, 81％ showed positive MPH％ and 56％ showed positive HPH％ for DBY. Significant variation in heterosis over locations and crosses was observed for MPH％ and HPH％ for most traits.
Brassica rapa heterosis biomass biogas general combining ability specific combining ability
Atta Ofori Heiko C.Becker
Department of Crop Sciences, Georg-August-University G(o)ttingen, Von-Siebold-Str.8, 37075 G(o)ttingen, Germany
国际会议
第十二届国际油菜大会( The 12th International Rapeseed Congress)
武汉
英文
140-143
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）