Morphoagronomic characterization and reproductive versatility in polymorph clover

Ionara Fátima Conterato, Jorge Dubal Martins, Madalena Boeni, Joseila Maldaner, Gerusa Pauli Kist Steffen, Rosana Mattos De Morais, Evandro Luiz Missio, Cleber Witt Saldanha, Diego Bitencourt De David
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Abstract

Trifolium polymorphum Poir. is a legume of natural pastures that combines amphicarpy with vegetative reproduction, but with little morphoagronomic information in populations of southern Brazil. In this study, plant height and diameter, number of primary stolons, dry matter, number of inflorescences, number of flowers per inflorescence, number of flowers with legume with seeds, number of flowers without legume or with legume without seeds, seed production, number and dry weight of storage roots were evaluated in populations of T. polymorphum. Little variation was observed for most characteristics, including low dry matter and aerial seed production. There were positive correlations between plant height and dry matter (r = 0.44), plant diameter and dry matter (r = 0.43), number of inflorescences and number of flowers per plant (r = 0.98) and number of inflorescences and seed production (r = 0.84). T. polymorphum presented low dry matter yield, however, the reproductive versatility of the species with the amphicarpic condition combined with vegetative propagation are mechanisms that allow the species to increase its frequency and contribution in natural pastures.
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多态三叶草的形态农艺特征和生殖多样性
多形三叶草是一种天然牧场的豆科植物,结合了两性繁殖和营养繁殖,但在巴西南部的种群中几乎没有形态农艺信息。本研究通过对多形土居群的株高、株径、初生匍匐茎数、干物质、花序数、单花序花数、带种子豆科花数、不带豆科花数、带种子豆科花数、带种子豆科花数、带种子豆科花数、带种子豆科花数和带种子豆科花数、种子产量、贮藏根数和干重进行了评价。在大多数性状上,包括低干物质和气生种子产量变化不大。株高与干物质(r = 0.44)、株径与干物质(r = 0.43)、花序数与单株花数(r = 0.98)、花序数与种子产量(r = 0.84)呈显著正相关。多形草的干物质产量较低,但多形草的生殖多样性和双性繁殖与无性繁殖相结合是其在天然草场中出现频率和贡献增加的机制。
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