已收录 272915 条政策
 政策提纲
  • 暂无提纲
Investigation into the suitability of wheat for ethanol production in the Western Cape
[摘要] ENGLISH ABSTRACT: This study aimed to investigate the suitability of spring wheat in the Western Cape as a potentialfeedstock for a future bio-ethanol industry as well as initiate a pre-breeding effort to develop bioethanol-directed improved lines.Determined primarily on grain yield, disease resistance and, direct as well as indirectassaying of important parameters, material was selected from a base-population for use as maleparents. These were crossed with female parents sourced from the Stellenbosch University PlantBreeding Laboratory (SU-PBL) male sterility -mediated marker-assisted recurrent selection (MSMARS)programe. This programe is constituted by an agronomically and disease-resistance -improved population, containing a dominant male sterility gene (Ms3). The progeny of thesecrosses was used to initiate the production of doubled haploids in order to ultimately derive higherethanol yielding lines.Multi-location field trial (MLFT) data revealed that 00K60-16-3-3 was the best adapted andhighest yielding (2160.95 litres ethanol per hectare) advanced breeding line (ABL). Its performancewas not statistically significantly less than first-ranked 03H86-8-2 (2184.62 litres per hectare) andboth ABLs significantly (P≤0.05) out-performed six controls in the study. ABL 00K60-16-3-3 wasalso the most adapted in terms of potential yield in litres per ton of grain. ABL 03H86-8-1 wassecond recommended for the Western Cape, performing above the expected mean for yield inlitres per hectare. Further adaptation of specific ABLs to the two major sub-regions of the WesternCape i.e. the Swartland and Southern Cape including the Rûens was also elucidated. Napier wassignificantly the highest yielding trial site although none of the considered sites were both stableand high yielding. It was also determined that entry X locality interaction (GxE) was indeedsignificant across the whole production area regarding litres per hectare as well as its two subregions.This is expected considering the environmentally diverse nature of the region as a whole.Using several entries as examples, relationships between starch, ethanol production inlitres ethanol per hectare and litres per ton where grain yield is not taken into consideration wereillustrated. Overall applicable relationships other than clear grouped entry differences could not beestablished. What was clearly demonstrated however, is that the maximization of grain yield isparamount. Highlighted thus, is the individuality of a specific genotype where MLFTs will alwaysbe required to quantify genotype potential.
[发布日期]  [发布机构] Stellenbosch University
[效力级别]  [学科分类] 
[关键词]  [时效性] 
   浏览次数:3      统一登录查看全文      激活码登录查看全文