Baum M, Grando S, Backes G, Jahoor A, Sabbagh A, Ceccarelli S
Germplasm Program, ICARDA, P.O. Box 5466, Aleppo, Syria.
Theor Appl Genet. 2003 Nov;107(7):1215-25. doi: 10.1007/s00122-003-1357-2. Epub 2003 Jul 26.
A genetic linkage map has been developed for recombinant inbred lines (RILs) of the cross 'Arta' x Hordeum spontaneum 41-1. One hundred and ninety four RILs, randomly chosen from a population of 494 RILs, were mapped with 189 markers including one morphological trait ( btr = brittle rachis locus). The linkage map extended to 890 cM. Agronomic traits such as grain yield, biological yield, days to heading, plant height, cold tolerance and others were evaluated at the ICARDA research stations Tel Hadya and Breda during the years 1996-97 and 1997-98. QTLs for agronomic traits related to drought resistance were localized. For the most-important character 'plant height under drought stress', QTLs on 2H, 3H and 7H were detected. The 'plant height' QTLs, specially the one on 3H, showed pleiotropic effects on traits such as days to heading, grain yield and biological yield. QTLs were also identified for other traits associated with adaptation to the Mediterranean environment such as cold tolerance, days to heading and tiller number. The identification of QTLs for agronomic traits is a first step to analyze and to dissect complex characters such as adaptation to drought tolerance.
已构建了杂交组合‘Arta’×野生大麦41-1的重组自交系（RIL）的遗传连锁图谱。从494个RIL群体中随机选取194个RIL，用包括一个形态性状（btr = 脆穗轴基因座）在内的189个标记进行图谱绘制。该连锁图谱延伸至890厘摩。1996 - 1997年和1997 - 1998年期间，在国际干旱地区农业研究中心（ICARDA）的Tel Hadya和Breda研究站对诸如籽粒产量、生物产量、抽穗天数、株高、耐寒性等农艺性状进行了评估。定位了与抗旱性相关的农艺性状的QTL。对于最重要的性状‘干旱胁迫下的株高’，在2H、3H和7H上检测到了QTL。‘株高’QTL，特别是3H上的QTL，对抽穗天数、籽粒产量和生物产量等性状表现出多效性作用。还鉴定出了与适应地中海环境相关的其他性状的QTL，如耐寒性、抽穗天数和分蘖数。农艺性状QTL的鉴定是分析和剖析复杂性状（如适应耐旱性）的第一步。
