Gheorghe Ittu, Nicolae Saulescu, Mariana Ittu, Pompiliu Mustatea
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引用次数: 0
摘要
小黑麦主要生长在罗马尼亚的丘陵地区,土壤贫瘠肥沃,每年约有10 -13万公顷,占可耕地的1.5%。自1971年育种计划开始以来,到目前为止,已经开发出适合罗马尼亚环境条件的小黑麦种质,并登记了12个新品种。据估计,27年来产量的遗传进展为每年增加46公斤公顷(1)或每年增加0.80%(1),与世界上最具活力的小黑麦育种计划实现的进展相似。在罗马尼亚小黑麦种质中引入RhtB1b (Rht1)和Ddw1 (Hl)基因,提高了每穗粒数、籽粒饱满度、试验重和降低了株高,实现了产量的提高。在这一时期,株高降低的遗传收益估计为1.16 cm /年(1)。在全球气候变化条件下的产量稳定性方面,需要取得进一步的进展,包括收获前发芽(PHS)更广泛的遗传多样性、耐旱性、早发性、高冠层反照率、抗病性,特别是对赤霉病(籽粒中DON含量低)、叶锈病和BYDV的抗性。
Present and perspectives in Romanian triticale breeding program.
Triticale is grown in Romania, mainly, in the hilly regions on the acid poor fertile soils and covers, yearly, around 100-130 thousands ha or 1.5% from the arable land. Since 1971, when the breeding program has been started, up to present, it has been developed an adapted triticale germplasm for the Romanian environmental conditions and 12 new varieties have been registered. Genetic progress for yield, estimated over a 27 years, is by 46 kg ha(1) year(1) or 0.80% year(1), similarly with those realized in the most dynamic triticale breeding programs of the world. The improving of yields has been achieved by an increased number of kernels per spikes, plumpness of kernels, test weight and reduction of the plant height by introduction in the Romanian triticale germplasm of RhtB1b (Rht1) and Ddw1 (Hl) genes. The genetic gain for reduction of plant height, in this period, was estimated at 1.16 cm yr(1). Further progress regarding yield stability under conditions of global climatic changes, a broader genetic diversity for preharvest sprouting (PHS), drought tolerance, earliness, high canopy albedo, diseases resistance, especially for fusarium head blight (low DON content in kernels), leaf rust and BYDV, is required.