大麥飼用性狀的好壞直接關(guān)系到動(dòng)物的表現(xiàn),，它決定了飼料向動(dòng)物產(chǎn)品轉(zhuǎn)化的效率。目前人們對(duì)飼用性狀研究不多,，因此蒙大拿州立大學(xué)的Lisa Surber和其他研究人員開(kāi)展了一項(xiàng)名為“大麥中飼用性狀相關(guān)數(shù)量性狀位點(diǎn)的確定”的研究,，這項(xiàng)工作發(fā)表在Springer link旗下的雜志上。
研究人員對(duì)飼用品質(zhì)特征的變化進(jìn)行了評(píng)估,，確定了相關(guān)的數(shù)量性狀位點(diǎn)（QTLs）,，并判斷這些性狀的變化是否具有可遺傳性。結(jié)果表明,，在過(guò)去兩年的試驗(yàn)中灌溉條件下的Steptoe x Morex雙單倍體大麥的圖譜群體呈上升趨勢(shì),。他們還研究了開(kāi)花和高產(chǎn)兩個(gè)階段的品質(zhì)性狀，分別在兩個(gè)階段鑒定出了32 QTLs和10 QTLs,。研究發(fā)現(xiàn)開(kāi)花階段飼用性狀的遺傳性較高或一般,，而高產(chǎn)階段性狀的遺傳性較低，這表明飼用性狀的選擇宜在作物發(fā)育早期進(jìn)行,。實(shí)驗(yàn)中鑒定出的QTLs將用于飼用性狀的標(biāo)記輔助選擇,。（生物谷Bioon.com）
生物谷推薦原文出處：
Molecular Breeding DOI:10.1007/s11032-010-9473-6
Mapping quantitative trait loci controlling variation in forage quality traits in barley
Lisa Surber1, Hussein Abdel-Haleem2, 3 , Jack Martin2, Pat Hensleigh2, Dennis Cash1, Jan Bowman1 and Tom Blake2
(1) Department of Animal and Range Sciences, Montana State University, Bozeman, MT 59717, USA
(2) Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman, MT 59717, USA
(3) Center for Applied Genetic Technologies, University of Georgia, 111 Riverbend Rd, Athens, GA 30602, USA
Barley forage quality has a direct relationship to animal performance, but forage quality traits are often neglected or not accessible to the plant breeders. Doubled haploid lines (145) from the cross Steptoe × Morex were grown in 2 years of trails under irrigated conditions to evaluate the variation in forage quality characteristics, identify quantitative trait loci (QTL) for these traits and determine if variation in forage quality characteristics among barley lines is heritable. Forage quality traits were determined at plant anthesis and at peak forage yield stages. A total of 32 QTL were identified that conditioned forage traits at anthesis stage, and 10 QTLs were identified at peak forage yield. At anthesis, forage traits were highly to moderate heritablely, while at peak forage yield, all traits were weakly heritable, indicating that selection progress for these traits will be effective at early stages of maturity. This research has identified and mapped QTL for barley forage quality and will allow deployment of genes for improved forage quality via marker-assisted selection.
