Do NERICA rice cultivars express resistance to Striga hermonthica (Del.) Benth. and Striga asiatica (L.) Kuntze under field conditions?
Do NERICA rice cultivars express resistance to Striga hermonthica (Del.) Benth. and Striga asiatica (L.) Kuntze under field conditions?
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DOI：
10.1016/j.fcr.2014.10.010
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发表时间：
2015-01
影响因子：
5.8
通讯作者：
Scholes, Julie D.
中科院分区：
文献类型：
--
作者：
Rodenburg, Jonne;Cissoko, Mamadou;Kayeke, Juma;Dieng, Ibnou;Khan, Zeyaur R.;Midega, Charles A. O.;Onyuka, Enos A.;Scholes, Julie D.
独脚金属在试管中观察到的非洲新稻品种的抗性在原位得到证实。NERICA-2，-10（S. asiatica）和-10、-17（S. hermonthica）是最有抵抗力的。NERICA-1、-17、-9（S. asiatica）和-1，-17，-10（S. hermonthica）表现出耐受性。一些非洲新稻品种产量为1.5-2 t ha−1，尽管Striga spp.侵扰寄生杂草Striga asiatica和Striga hermonthica导致非洲雨养高地产量损失惨重。两个抗性类（前和后附着）和几个抗性基因型已被确定在非洲新稻（非洲新稻）品种在实验室条件下（在体外）以前。然而，鲜为人知的是，这种电阻在现场条件下的表达。在这里，我们调查了（1）是否在控制条件下表现出的抗性将在代表性的独脚金侵染的田间条件下表达，以及（2）非洲新稻品种是否会在独脚金侵染的条件下获得相对较好的籽粒产量。对25个水稻品种（包括18个高地品种）进行了S. asiatica infested（in Tanzania）and S.在两个季节里，在肯尼亚的田地里有hermonthica出没。此外，选择的品种进行了测试，在体外，在迷你根管系统。首次在田间证实了在控制条件下观察到的NERICA-2、-5、-10和-17（抗S. asiatica）和非洲新稻（NERICA）-1 ~-5、-10、-12、-13和-17（对S. Hermonthica）。尽管有很高的独脚金侵扰水平，但NERICA-1、-9和-10获得了约1.8吨公顷的产量（在S. asiatica侵染田）和NERICA-3、-4、-8、-12和-13（在S. hermonthica侵染的田地）。此外，在体外确定了NERICA-1、-17和-9（S. asiatica）和NERICA-1、-17和-10（S. Hermonthica）。这些发现对水稻农学家、育种家和从事抗独脚金研究的分子遗传学家具有重要意义。此外，品种结合广谱抗性和良好的粮食产量在独脚金侵扰的领域可以推荐给稻农在独脚金易发地区。
Striga spp. resistance in NERICA cultivars, observed in vitro, was confirmed in situ. NERICA-2, -10 (S. asiatica) and -10, -17 (S. hermonthica) are most resistant. NERICA-1, -17, -9 (S. asiatica) and -1, -17, -10 (S. hermonthica) show tolerance. Some NERICA cultivars yielded 1.5–2 t ha−1 despite Striga spp. infestation. The parasitic weeds Striga asiatica and Striga hermonthica cause high yield losses in rain-fed upland rice in Africa. Two resistance classes (pre- and post-attachment) and several resistant genotypes have been identified among NERICA (New Rice for Africa) cultivars under laboratory conditions (in vitro) previously. However, little is known about expression of this resistance under field conditions. Here we investigated (1) whether resistance exhibited under controlled conditions would express under representative Striga-infested field conditions, and (2) whether NERICA cultivars would achieve relatively good grain yields under Striga-infested conditions. Twenty-five rice cultivars, including all 18 upland NERICA cultivars, were screened in S. asiatica-infested (in Tanzania) and S. hermonthica-infested (in Kenya) fields during two seasons. Additionally, a selection of cultivars was tested in vitro, in mini-rhizotron systems. For the first time, resistance observed under controlled conditions was confirmed in the field for NERICA-2, -5, -10 and -17 (against S. asiatica) and NERICA-1 to -5, -10, -12, -13 and -17 (against S. hermonthica). Despite high Striga-infestation levels, yields of around 1.8 t ha−1 were obtained with NERICA-1, -9 and -10 (in the S. asiatica-infested field) and around 1.4 t ha−1 with NERICA-3, -4, -8, -12 and -13 (in the S. hermonthica-infested field). In addition, potential levels of tolerance were identified in vitro, in NERICA-1, -17 and -9 (S. asiatica) and in NERICA-1, -17 and -10 (S. hermonthica). These findings are highly relevant to rice agronomists and breeders and molecular geneticists working on Striga resistance. In addition, cultivars combining broad-spectrum resistance with good grain yields in Striga-infested fields can be recommended to rice farmers in Striga-prone areas.
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影响因子：
1.9
作者：
Botanga, CJ;Kling, JG;Timko, MP
通讯作者：
Timko, MP
影响因子：
2.8
作者：
Johnson, DE;Riches, CR;Jones, MJ
通讯作者：
Jones, MJ
影响因子：
9.4
作者：
Kaewchumnong, Krittika;Price, Adam H.
通讯作者：
Price, Adam H.
DOI：
10.1079/9781845938123.0035
发表时间：
2013-01-01
期刊：
REALIZING AFRICA'S RICE PROMISE
影响因子：
--
作者：
Diagne, Aliou;Amovin-Assagba, Eyram;Wopereis, Marco C. S.
通讯作者：
Wopereis, Marco C. S.
影响因子：
2
作者：
Kettenring, Jon R.
通讯作者：
Kettenring, Jon R.