2篇
您的检索式：作者名="Robert L.Conner"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Inheritance of marsh spot disease resistance in cranberry common bean(Phaseolus vulgaris L.)显示文摘Common bean(Phaseolus vulgaris) is an annual legume crop that is grown worldwide for its edible dry seeds and tender pods. Marsh spot(MS) of the seeds is a physio-genic stress disease affecting seed quality in beans. Studies have suggested that this disease involves a nutritional disorder caused by manganese deficiency, but the inheritance of resistance to this disease has not been reported. A biparental genetic population composed of 138 recombinant inbred lines(RILs) was developed from a cross between an MS resistant cultivar ‘Cran09’ and an MS susceptible cultivar ‘Messina’. The 138 RILs and their two parents were evaluated for MS resistance during five consecutive years from 2015 to 2019 in sandy and heavy clay soils in Morden, Manitoba, Canada. The MS incidence(MSI) and the MS resistance index(MSRI) representing disease severity were shown to be both highly correlated heritable traits that had high broad-sense heritability values(H;) of 86.5% and 83.2%, respectively. No significant differences for MSI and MSRI were observed between the two soil types in all five-(MSI) or four-year(MSRI) data collection, but significant correlations among years were observed despite MS resistance was moderately affected by year. The MSIs and MSRIs displayed a right-skewed distribution, indicating a mixed genetic model involving a few major genes and polygenes. Using the joint segregation analysis method, the same four major genes with additive-epistasis effects showed the best fit for both traits, explaining 84.4% and85.3% of the phenotypic variance for MSI and MSRI, respectively. For both traits, the M1, M2, M3 and m4 acted as the favorable(resistant) alleles for the four genes where M and m represent two alleles of each gene. However, due to epistatic effects, only the individuals of the M1 M2 M3 M4 haplotype appeared to be highly resistant, whereas those of the m1 m2 m3 M4 haplotype were the most susceptible. The m4 allele significantly suppressed the additive effects of M1 M2 M3 on resistance, but decreased susceptibility due to the additive effects of m1 m2 m3. Further quantitative trait locus(QTL) mapping is warranted to identify and validate individual genes and develop molecular markers for marker-assisted selection of resistant cultivars. | Bosen Jia Robert L.Conner Nadeem Khan Anfu Hou Xuhua Xia Frank M.You | 2022 | The Crop Journal2022，10，2： | 0 |
| 2 | 小麦异源双倍体和染色体代换系根腐病抗性鉴定显示文摘现有的硬质红粒春小麦(Triticum aestivum L. em Thell.)品种对于由病原菌Cochliobolus sativus (Ito和Kurib) Dreschl.ex Das ur引起的根腐病仅表现中抗水平.本研究的目的是鉴定来自方穗山羊草(节节麦)和冰草属几个种的小麦异源双倍体和染色体代换系是否能作为根腐病的新抗原.建立了携带根腐病抗性的Agrotana即小麦-茸毛冰草双倍体的温室研究系列.对由方穗山羊草第1-7条染色体代换冬小麦品种Winalta D组染色体的代换系的试验表明,它们对根腐病严重程度的影响不稳定.同样,长穗冰草部分同源染色体代换Winalta 4D、5D和6D染色体的代换系,以及中间冰草的第4条染色体代换Winalta 4B染色体的代换系,对根腐病严重程度没有影响.地下根颈节间的分离培养表明,用C.sativus侵染Agrotana,植株发病率明显比其他外来品系和普通小麦品种都低,这表明Agrotana可能对根腐病具有特异的抗性机制. | Robert L.Conner 傅杰 | 1991 | 国外农学(麦类作物)1991，，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员