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从(T.durum×H.villosa)F_1的自交和自由授粉后代中,获得了兼具硬粒小麦穗形和簇毛麦护颖颖脊刚毛、叶片和叶鞘边缘茸毛和对白粉病免疫等双亲性状的结实性正常的植株。经细胞学鉴定,其2n=42,在花粉母细胞减数分裂中期 I(MI)有20.5个二价体,1个左右单价体,在80%左右的花粉母细胞中有21个二价体,对其自交后代连续3年、5个世代的鉴定结果表明,上述性状已基本稳定。用染色体 N——分带技术进行带型分析的结果证明,它是一个包含有硬粒小麦 A、B 染色体组和簇毛麦 V 染色体组的硬粒小麦——簇毛麦双二倍体 AABBVV.该双二倍体株高100—110厘米,穗长9—12厘米,每穗有20—24个小穗,每穗30粒左右,千粒重25—35克,籽粒蛋白质含量20%左右,对白粉病免疫,抗锈病,感染赤霉病。将它与普通小麦(T.aestivum)杂交,F_1植株的花粉母细胞在 MI 有14个左右二价体和14个左右单价体,自交结实率仅3%左右。但用普通小麦回交,结实率可逐代提高。在回交后代群体中,已分离出对白粉病免疫的植株,是一个可望在小麦育种计划中利用的新中间型材料。对(硬粒小麦“中引1320”×簇毛麦)F_1和上述双二倍体的研究表明,(硬粒小麦“中引1320”×簇毛表)F_1可以产生染色体不减数的配子,不减数的雌、雄配子结合可获得自然加倍的异源多倍体。这种产生
From the selfing and free pollination progeny of (T.durum × H.villosa) F_1, we obtained the results of both the brackish, A solid, normal plant of the parental trait. The result of cytology showed that 2n = 42, there were 20.5 divalent and 1 monovalent I (MI) in the meiosis stage of pollen mother cells, and 21 divalent bodies in about 80% pollen mother cells For three years in a row, the identification results of five generations showed that these traits had basically stabilized. The result of banding analysis using chromosome N - banding technique demonstrated that it is a durum wheat - Tuomicum diploid AABBVV containing Durian wheat A, B genomes and Villospermum V genomes The double diploid plant height of 100-110 cm, ear length 9-12 cm, spikelets per ear 20-24, about 30 per spike, grain weight 25-35 grams, grain protein content of about 20% of the Powdery mildew immunity, rust resistance, head blight. It was crossed with common wheat (T.aestivum), F1 plants pollen mother cells in MI about 14 bivalent and 14 monovalent, selfing seed set rate of only about 3%. However, backcrossing with ordinary wheat, seed setting rate can be increased from generation to generation. Among backcross progeny groups, plants that have been isolated for powdery mildew immunity have been isolated as a new intermediate material that is expected to be utilized in wheat breeding programs. Studies on (Triticum davidii “Citation 1320” × Hirschsprung) F_1 and the above-mentioned bi-diploid showed that F_1 (durian “citation 1320” × tufted hair) F12 in durum could produce gametes with non- Not reducing the number of female and male gametes combine to obtain natural doubled allopolyploidy. This produces