A new reduced height gene found in the tetraploid semi-dwarf wheat landrace Aiganfanmai
A new reduced height gene found in the tetraploid semi-dwarf wheat landrace Aiganfanmai
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四倍体半矮化小麦地方品种爱干饭麦中发现一个新的矮高基因
DOI：
10.4238/2011.october.5.5
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发表时间：
2011-01-01
影响因子：
0.4
通讯作者：
Liao, M. L.
中科院分区：
文献类型：
--
作者：
Peng, Z. S.;Li, X.;Liao, M. L.
矮杆繁麦是一个矮秆四倍体小麦地方品种。turgidum），其稳定地产生半矮秆性状。栽培时植株高度为80-105厘米。与硬粒小麦（T.图尔吉达姆湾durum）品种兰登，我们发现它有短穗和种子，除了一个半侏儒的性格。我们将矮杆繁麦与兰登杂交，分析半矮秆性状的遗传基础。矮秆返麦F-2代矮秆性状与正常性状的分离比例为1：3，表明矮秆返麦携带隐性矮秆基因。微卫星分析表明该基因位于7AS臂上的分子标记Xgwm 471和Xgwm 350之间。没有Rht基因的报道，我们将其命名为Rht 22。Rht 22，不像其他以前报道的Rht基因，不减少节间细胞长度。细胞数量的减少可能解释了短茎的特征。
Aiganfanmai is a dwarf tetraploid wheat landrace (Triticum turgidum var. turgidum) that stably produces the semi-dwarf trait. Plant height varies from 80-105 cm under cultivation. Compared with tall durum wheat (T. turgidum var. durum) variety Langdon, we found it to have short spikes and seeds, besides a semi-dwarf character. We crossed Aiganfanmai with Langdon to analyze the genetic basis of the semi-dwarf trait. The F-2 population segregated at a 1:3 ratio for the short trait to the normal, which demonstrates that Aiganfanmai carries a recessive reduced height (Rht) gene. This gene was found to be located between the molecular markers Xgwm471 and Xgwm350 on chromosome arm 7AS by microsatellite analysis. No Rht gene had been reported from this chromosome; we designated it as Rht22. Rht 22, unlike other previously reported Rht genes, does not reduce internodal cell length. Reduced cell numbers might explain the short stem trait.