《Table 6–Preliminary yield performance from best selected F2:6lines derived from ARS 563–286 and ARS

  提示：宽带有限、当前游客访问压缩模式

本系列图表出处文件名：随高清版一同展现

《Alternate phenotype–genotype selection for developing superior high-yielding irrigated rice lines》

1. 获取 高清版本忘记账户？点击这里登录

1. 下载图表忘记账户？点击这里登录

GY，promising lines grain yield；GYsdc，standard check variety grain yield；GYbp，best parent grain yield；GYmidp，mid-parent grain yield.*Significant at the 0.05 probability level.**Significant at the 0.01 to 0.001 probability levels.

The experiments were conducted at the Africa Rice Regional Research Center in St Louis，Senegal，（16°14′N，16°14′W，9 m a.s.l.） .An allelic diversity survey was conducted with 30high-yielding rice varieties（Fig.1）that were screened and selected from 300 high-yielding indica cultivars from West African countries during the 2012 dry and wet seasons in two locations.Markers polymorphic between NERICA-L-20（Africa Rice）and Giza178（Egypt Research Center）associated with grain weight（GW5，Marker_1 to Marker_3），grain size（GS3，Marker_4 to Marker 6），grain number（Gn1a，Marker_7 to Marker_10）and strong stems and heavy panicles（SCM2/APO1，Marker_11 to Marker_16）were used to show plant performance for yield component traits of each inbred line（Table 1）.The F1（ARS 563）progeny derived from crosses between NERICA-L-20 and Giza178 were self-pollinated to generate large F2，F2:3，F2:4，and F2:5populations.Field experiments were conducted twice a year from 2012 to 2014 and F2populations totaling 1000 plants were evaluated during the 2013 dry season.An augmented experimental design laid out in 40blocks was used to evaluate yield potential.Each block contained two rows of each parent，two checks（Sahel 108and Sahel 201，released by ISRA Senegal）and 29 F2lines.The parents and checks were replicated in each block.In contrast，a randomized complete block design with three replications was used to evaluate selected F2:3，F2:4，and F2:5lines.The transplanting density was 20 cm between plants within rows and 20 cm between rows.Fertilizers were applied at the rate of 150 kg ha-1as follows:NPK15–15-15at vegetative stage and60 kg ha-1urea as top dressing at tillering and panicle initiation.Weeds were controlled manually throughout the growing season.The descriptors for rice[23]were used to record total biomass（TB），harvest index（HI），panicle number per square meter（PN/m2），total grain number per panicle（GNP），1000-weight grain（1000-GW），spikelet fertility（SF），and grain yield（GY）for selected F2:3and F2:4.Tiller number at60 days after planting（T60），plant height at 60 days after planting（H60），and days to heading at 50%flowering（DH50）were added as parameters for selected F2:5plants.Pedigree selection including the two parents and check varieties（Sahel108 and Sahel 201）was conducted using a phenotypic acceptability parameter rate scaling that ranged from excellent（1）to unacceptable（9）with intermediate values of 3（good），5（fair），and 7（poor）.