Developing perennial upland rice II:: Field performance of S1 families from an intermated Oryza sativa/O. longistaminata population
Developing perennial upland rice II:: Field performance of S1 families from an intermated Oryza sativa/O. longistaminata population
复制标题
DOI：
10.2135/cropsci2003.0129
复制
发表时间：
2003-01-01
期刊：
影响因子：
2.3
通讯作者：
Cruz, MTS
中科院分区：
文献类型：
--
作者：
Sacks, EJ;Roxas, JP;Cruz, MTS
在东南亚，旱稻（Oryza sativa L.）是一种一年生作物，通常在丘陵地区种植，导致土壤侵蚀和流域退化。我们希望开发一种多年生旱稻，通过永久地被覆盖来帮助保护自然资源，同时为自给自足的农民提供有价值的食物。长雄野生稻 A. Chev.等罗尔。是 O. sativa 的高度多年生根茎近缘种，可能是开发多年生旱稻的有用基因来源。进行这项研究是为了评估 O. sativa/O. 的潜力。用于开发多年生旱稻的长雄群体。作为比较的基线，没有一个品种对照存活过 1 年。在94个S家庭中，1年生存率从0%到63.6%不等，但只有6个家庭的生存率超过30%。根据对土壤表面的观察，只有不到 1% 的后代植物产生了根茎。然而，三个科产生了大约 25% 的根茎个体，表明存在具有很大影响的单一基因座。种间杂交障碍导致低产量，许多植物完全不育。观察到的低生育力和有限的多年生性可能会使该种群的进一步繁殖变得困难。
In Southeast Asia, upland rice (Oryza sativa L.) is an annual crop that is typically cultivated on hilly sites, contributing to the erosion of soil and the degradation of watersheds. We wish to develop a perennial upland rice that would help conserve natural resources via a permanent ground cover, while providing subsistence farmers with a valued food. Oryza longistaminata A. Chev. et Roehr. is a highly perennial, rhizomatous relative of O. sativa that may be a useful source of genes for developing perennial upland rice. This study was conducted to evaluate the potential of an O. sativa/O. longistaminata intermated population for developing perennial upland rice. As a baseline for comparison, none of the cultivar controls survived 1 yr. Among 94 S, families, 1-yr survival ranged from 0 to 63.6% but only six families had more than 30% survival. On the basis of observations at the soil surface, less than 1% of the progeny plants produced rhizomes. However, three families produced approximately 25% rhizomatous individuals, suggesting the presence of a single locus with large effect. Interspecific crossing barriers led to low S, yields, with many plants being completely sterile. The low fertility and limited perenniality observed may make further breeding progress with this population difficult.