关键词:普通小麦; 华山新麦草; 异代换系; SCAR; 基因组原位杂交(GISH); SSR; STS Molecular Cytogenetics Identification of a wheat Psathyrostachys huashanica Substitution Line DH2322 WANG Xiu-Juan, CHEN Xin-Hong, PANG Yu-Hui, JING Fan, ZHANG Jun, HU Si-Yuan, ZAN Kai, WU Jun, YANG Qun-Hui, ZHAO Ji-Xin* College of Agronomy, Northwest A&F University, Yangling 712100, China
AbstractA wheat- P. huashanica alien substitution line DH2322 was isolated from the F4 progeny of heptaploid hybrid H8911 × Triticum durum cv. D4286 and identified by using SCAR markers, genomic in situ hybridization (GISH) , SSR markers, and STS markers. The results using SCAR marker RHS141 showed that DH2322 carrys chromosome derived from P. huashanica. Cytogenetics observation indicated that DH2322 has a chromosome karyotype of 2 n = 42 = 21 II. GISH showed that DH2322 is a line with 40 chromosomes from wheat and two Ns chromosomes from P. huashanica, which formed a ring bivalent at metaphase I in pollen mother cells (PMC). According to SSR and STS analysis, the wheat chromosome 2D in DH2322 was substituted by the chromosome 2Ns from P. huashanica. Evaluation of the agronomic traits showed that DH2322 presented favorable agronomic traits in spike length and kernels per spike. Development of this new germplasm will be useful for wheat breeding programs in the future.
Keyword: Triticum aestivum; Psathyrostachys huashanica; Alien substitution line; SCAR; GISH; SSR; STS Show Figures Show Figures
图1 华山新麦草基因组特异SCAR标记分析Fig. 1 Amplification profile of the SCAR marker specific to P. huashanicaM: marker D2000; 1: 7182; 2: D4286; 3: DH2322; 4: H8911; 5: P. huashanica.
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