期刊
AGRONOMY JOURNAL
卷 112, 期 4, 页码 2466-2471出版社
WILEY
DOI: 10.1002/agj2.20253
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资金
- Vicerrectoria de Investigaci.n e Interacci.n Social - Universidad deNarino
The GRICAND, Andean Crops Research Group has identified two resistant pea (Pisum sativum L.) lines to powdery mildew (PM) (Erysiphe pisi): ILS6527 (resistance of foliage and pods) and UN6651 (pods only resistance). This study established the inheritance of these two distinct PM-resistance genotypes. Resistant lines ILS6527 and UN6651 were crossed with two susceptible varieties (Andina and San Isidro) and their respective generations (F-1, F-2, BCr, and BCs) were evaluated for PM resistance in naturally infected field tests. Data were subjected to chi-square (chi (2)) and homogeneity test. The two crosses of ILS6527 segregated in a monogenic Mendelian ratio of 3 susceptible: 1 resistant in F-2 generation, and 1 susceptible: 1 resistant ratio in BCr, which indicate a recessive control of resistance. The resistance gene in ILS6527 may be allelic with er-1. UN6651 exhibited PM resistance only in pods, the F-2 and backcrosses from the crosses with UN6651 segregated in a manner indicative of recessive resistance.
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