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Titolo:
'Forrest' resistance to the soybean cyst nematode is bigenic: saturation mapping of the Rhg1 and Rhg4 loci
Autore:
Meksem, K; Pantazopoulos, P; Njiti, VN; Hyten, LD; Arelli, PR; Lightfoot, DA;
Indirizzi:
So Illinois Univ, Ctr Excellence Soybean Res Teaching & Outreach, Dept Plant Soil & Gen Agr, Carbondale, IL 62901 USA So Illinois Univ Carbondale ILUSA 62901 en Agr, Carbondale, IL 62901 USA Univ Missouri, Dept Agron, Columbia, MO 65211 USA Univ Missouri Columbia MO USA 65211 i, Dept Agron, Columbia, MO 65211 USA
Titolo Testata:
THEORETICAL AND APPLIED GENETICS
fascicolo: 5, volume: 103, anno: 2001,
pagine: 710 - 717
SICI:
0040-5752(200110)103:5<710:'RTTSC>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
QUANTITATIVE TRAIT LOCUS; HIGH-RESOLUTION MAP; DEATH SYNDROME SDS; DNA MARKERS; GENETIC-RELATIONSHIPS; HETERODERA-GLYCINES; PLANT INTRODUCTIONS; MOLECULAR MARKERS; FIELD-RESISTANCE; QTL ANALYSIS;
Keywords:
soybean cyst nematode; AFLP; high-resolution genetic mapping; marker assisted breeding; Rhg1; Rhg4; qualitative mapping;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
52
Recensione:
Indirizzi per estratti:
Indirizzo: Meksem, K So Illinois Univ, Ctr Excellence Soybean Res Teaching & Outreach, Dept Plant Soil & Gen Agr, Room 176, Carbondale, IL 62901 USA So IllinoisUniv Room 176 Carbondale IL USA 62901 , IL 62901 USA
Citazione:
K. Meksem et al., "'Forrest' resistance to the soybean cyst nematode is bigenic: saturation mapping of the Rhg1 and Rhg4 loci", THEOR A GEN, 103(5), 2001, pp. 710-717

Abstract

Field resistance to cyst nematode (SCN) race 3 (Heterodera glycines I.) insoybean [Glycine max (L. ) Merr.] cv 'Forrest' is conditioned by two QTLs: the underlying genes are presumed to include Rhg1 on linkage group G and Rhg4 on linkage group A2. A population of recombinant inbred lines (RILs) andtwo populations of near-isogenic lines (NILs) derived from a cross of Forrest x Essex were used to map the loci affecting resistance to SCN. Bulked segregant analysis, with 512 AFLP primer combinations and microsatellite markers, produced a high-density genetic map for the intervals carrying Rhg1 and Rhg4. The two QTLs involved in resistance to SCN were strongly associated with the AFLP marker E(ATG)M(CGA)87 (P = 0.0001, R-2 = 24.5%) on linkage group G, and the AFLP marker E(CCG)M(AAC)405 (P = 0.0001, R-2 = 26.2%) on linkage group A2. Two-way analysis of variance showed epistasic interaction (P = 0.0001, R-2 = 16%) between the two loci controlling SCN resistance in Essex x Forrest recombinant inbred lines. Considering the two loci as qualitative genes and the resistance as female index FI <5%, jointly the two loci explained over 98% of the resistance. The locations of the two QTLs were confirmed in the NILs populations. Therefore SCN resistance in Forrest x Essex is bigenic. High-efficiency marker-assisted selection can be performed using the markers to develop cultivars with stable resistance to SCN.

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Documento generato il 05/04/20 alle ore 06:42:58