杂交青贮玉米胜丰青贮2号的选育及栽培技术

随着市场对奶、肉等畜产品需求的增加,内蒙古鄂尔多斯市畜牧业发展迅猛,对饲草料需求逐年增加。为进一步增加鄂尔多斯市牲畜的产奶量或提高肉质,提高畜牧业发展水平,促进农业增效、农民增收,以主要栽植品种胜丰青贮2号为例,介绍其优良的品种特性,并从选地与整地、播种、灌溉、施肥、病虫草害防控、适时收获青贮、滴灌带及残膜回收利用、制种技术要点等方面总结胜丰青贮2号高产技术,最后以2020—2022年鄂尔多斯市达拉特旗、杭锦旗、乌审旗3地的实际产量及效益佐证胜丰青贮2号优质的品种特性。

16个玉米品种萌芽期耐旱性和耐盐性评价

【目的】评价16个玉米品种萌芽期的耐旱性和耐盐性。【方法】设置15%PEG-6000干旱胁迫、20%PEG-6000干旱胁迫、220 mmol/L NaCl盐胁迫、300 mmol/L NaCl盐胁迫和对照(清水)5个处理,通过加权隶属函数值法对16个供试玉米品种的耐旱性和耐盐性分别进行分级评价,利用GGE叠图法区分品种抗性,同时对不同胁迫处理在品种评价上的相似性和区分能力进行分析。【结果】加权隶属函数值法评价结果为伊单131和真金308属于耐旱品种,伊单81属于耐盐品种;利用GGE叠图法区分不同胁迫处理发现,15%PEG-6000、20%PEG-6000和300 mmol/L NaCl 3个胁迫处理呈正相关关系,综合评价16个玉米品种的耐旱性和耐盐性,伊单131、伊单81和真金308耐旱性较好,伊单81、伊单507和胜丰青贮2号耐盐性较好。【结论】伊单131属于耐旱品种、伊单81是既耐旱又耐盐的玉米品种。

Genetic overlap between salt and low-temperature tolerance loci at germination stage of soybean

Salt and low temperature were both very important factors for soybean production. It was necessary to improve the salt stress and low-temperature tolerance of soybean. The main purpose of this paper was to map the quantitative trait loci(QTL) related with salt tolerance and low- temperature tolerance at germination stage with backcross introgression lines(BILs),and analyze the genetic overlap between them. There were 22 QTL located with BC2 F4 introgression populations after salt stress,and 15 QTL were mapped after low-temperature stress. Seven overlapping QTLs between salt tolerance and low-temperature tolerance were detected on 6 linkage groups at germination stage. In total,there were 31.81 % of salt tolerance and low-temperature tolerance loci existed genetic overlap.