Instituto de Botánica del Nordeste, Facultad de Ciencias Agrarias, Universidad Nacional del Nordeste, Consejo Nacional de Investigaciones Científicas y Técnicas, Corrientes 3400, Argentina.
Facultad de Ciencias Agrarias, Universidad Nacional del Nordeste, Corrientes 3400, Argentina.
Genes (Basel). 2023 Mar 2;14(3):631. doi: 10.3390/genes14030631.
The tetraploid germplasm of contains a large diversity that can be used to generate better forages. The objective was to evaluate a group of and apomictic hybrids for a set of agronomic traits and apomixis expressivity. Forage yield, cold tolerance, winter regrowth, and seed yield were evaluated. The expressivity of apomixis was evaluated in hybrids by flow cytometry. Progeny testing with molecular markers was used to determine the genotypic variability in the progeny. Differences within and hybrids were observed for all traits, and some of them were superior in comparison with the controls. The accumulated forage yield during three years was 988 g m in the hybrids, whereas, in , the average forage yield per harvest (40 days of regrowth) was 180 g m. In , the apomixis expressivity varied between 0 and 100%, and 65% of the hybrids showed high apomixis expressivity (superior to 70%). The genotypic mean homogeneity in the progeny was 76% and 85% in and , respectively. The generation of hybrids with high apomixis expressivity that combine good agronomic performance and homogeneity in the offspring is possible in tetraploid and .
四倍体 的种质资源中含有丰富的多样性，可用于培育更好的饲料。本研究的目的是评估一组 和 种间无融合生殖杂种的一系列农艺性状和无融合生殖表达能力。评估了饲料产量、耐寒性、冬季再生和种子产量。通过流式细胞术评估 杂种的无融合生殖表达能力。利用分子标记进行后代测试，以确定后代的基因型变异性。 和 杂种的所有性状都存在差异，其中一些性状与对照相比表现出优越性。在三年的时间里， 杂种的累积饲料产量为 988 克/平方米，而 在每次收获（40 天再生）时的平均饲料产量为 180 克/平方米。 在 中，无融合生殖的表达率在 0%到 100%之间变化，65%的杂种表现出高的无融合生殖表达率（高于 70%）。后代的基因型平均同质性分别为 76%和 85%， 在 和 中。在四倍体 中，有可能产生具有高无融合生殖表达能力、结合良好农艺性能和后代同质性的杂种。
