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首页> 外文期刊>Tropical Agriculture and Development >Identifying High-Yielding Rice Varieties Adapted to Rainfed Upland Conditions in Benin and Their Plant Characteristics
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Identifying High-Yielding Rice Varieties Adapted to Rainfed Upland Conditions in Benin and Their Plant Characteristics

机译：贝宁适合旱作旱作的高产水稻品种的鉴定及其植物特性

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Four rainfed upland experiments were conducted in Benin to assess yield differences in 65 rice varieties, including the interspecific hybrids: the upland New Rice for Africa (NERICA) varieties developed from crossing Oryza sativa L. and 0. glaberrimaSteud.. The mean grain yields ranged from 32 to 350 g/m2 across experiments. The genotype X environment (G X E) interaction accounted for 15% of the total sum of squares, with environment and genotype responsible for 74 and 12%, respectively. Upland indica B6144F-MR-6-0-0 performed well in three out of four environments, showing consistently higher yields than other upland NERICA varieties and their parents. Upland indica Aus257 was stable across environments with good adaption to poor soil fertility. None of the upland NERICA varieties showed consistently higher yields than their parents across the four environments. The group of long-duration varieties (e.g. IR 8, IR 24, Taichung Nativel) performed well only in most-favorable environments. The high-yielding varieties B6144F-MR-6-0-0 and Aus257 were intermediate in panicle number (160-180 panicles/m~2 on average). This was the only common characteristic among the highest yielding varieties. These results suggest that further increases in rice yieldsin the rainfed uplands of West Africa are most likely to occur through using upland indica varieties as donors.
机译：在贝宁进行了四个旱育旱地试验，以评估65种水稻品种的产量差异，包括种间杂种：从杂交稻和0. glaberrimaSteud杂交而来的非洲旱稻新品种（NERICA）。平均谷物产量介于实验范围从32到350 g / m2。基因型X环境（G X E）相互作用占总平方和的15％，其中环境和基因型分别占74和12％。旱地in稻B6144F-MR-6-0-0在四个环境中的三个中表现良好，显示出始终高于其他旱地NERICA品种及其亲本的单产。旱地AAus257在各种环境下均能保持稳定，并能很好地适应恶劣的土壤肥力。在这四个环境中，陆地上的NERICA品种均未显示出比其父母一致更高的产量。较长时间的品种（例如IR 8，IR 24，台中土产）仅在最有利的环境中表现良好。高产品种B6144F-MR-6-0-0和Aus257的穗数居中（平均穗数为160-180个/ m〜2）。这是产量最高的品种中唯一的共同特征。这些结果表明，通过使用旱地up稻品种作为供体，最有可能在西非雨育高地进一步增加稻米单产。

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