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Cytogenetic Characteristics and Resistance to Stripe Rust of Derivatives from Hybrid between Triticum monococcum and Wild Oat
Author(s): 
Pages: 1745-1751
Year: Issue:  9
Journal: Acta Botanica Boreali-Occidentalia Sinica

Keyword:  一粒小麦葡萄牙野燕麦条锈病细胞学新抗源;
Abstract: 在一粒小麦与葡萄牙野燕麦远缘杂交后代中,选育了5个形态学稳定的抗条锈病衍生系(‘一粒葡')YLP1、YLP-7、YLP-9、YLP-13和YLP-16,为筛选含有外源染色体且抗性优良的植株,对该衍生系的细胞学特征和抗病性进行了鉴定.细胞学初步鉴定表明:根尖染色体数目均为2n=42,花粉母细胞减数分裂中期Ⅰ染色体构型为2n=21Ⅱ;5个选系与‘中国春’杂交F1花粉母细胞减数分裂中期Ⅰ的异常细胞构型率为16%~50%;初步鉴定这5个‘一粒葡’材料均为易位系,验证了‘一粒葡’是远缘杂交的后代.用9个条锈菌小种分别对9个株系进行苗期抗病性鉴定,有5个株系YLP-1-4、YLP-7、YLP-9-1、YLP-9-3、YLP-16-1对所有参试小种都表现为高抗,且与已知的Yr5、Yr10、Yr15、Yr24/Yr26基因不同,表明‘一粒葡’中可能含有新的抗病基因,可作为抗源用于小麦抗病育种.
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