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Titolo:
Identification of two closely linked quantitative trait loci for cold tolerance on chromosome 4 of rice and their association with anther length
Autore:
Saito, K; Miura, K; Nagano, K; Hayano-Saito, Y; Araki, H; Kato, A;
Indirizzi:
Natl Agr Res Ctr Hokkaido Reg, Sapporo, Hokkaido 0628555, Japan Natl Agr Res Ctr Hokkaido Reg Sapporo Hokkaido Japan 0628555 28555, Japan Natl Inst Agrobiol Sci, Tsukuba, Ibaraki 3058602, Japan Natl Inst AgrobiolSci Tsukuba Ibaraki Japan 3058602 araki 3058602, Japan Furukawa Agr Expt Stn, Furukawa, Miyagi 9896227, Japan Furukawa Agr Expt Stn Furukawa Miyagi Japan 9896227 Miyagi 9896227, Japan
Titolo Testata:
THEORETICAL AND APPLIED GENETICS
fascicolo: 6-7, volume: 103, anno: 2001,
pagine: 862 - 868
SICI:
0040-5752(200111)103:6-7<862:IOTCLQ>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
YOUNG MICROSPORE STAGE; LINKAGE MAP; COOLING TREATMENT; F-2 POPULATION; ORYZA-SATIVA; POLYMORPHISMS; MARKERS; PLANTS; QTLS; DNA;
Keywords:
cold tolerance; anther length; QTL mapping; near-isogenic line; rice;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Saito, K Natl Agr Res Ctr Hokkaido Reg, Hitsujigaoka 1, Sapporo, Hokkaido 0628555, Japan Natl Agr Res Ctr Hokkaido Reg Hitsujigaoka 1 Sapporo Hokkaido Japan 0628555
Citazione:
K. Saito et al., "Identification of two closely linked quantitative trait loci for cold tolerance on chromosome 4 of rice and their association with anther length", THEOR A GEN, 103(6-7), 2001, pp. 862-868

Abstract

Norin-PL8 is a cold-tolerant variety of rice (Oryza sativa L.) that was developed by introgressing chromosomal segments from a cold-tolerant javanicavariety, Silewah. We previously detected quantitative trait loci (QTLs) for cold tolerance of Norin-PL8 in the introgressions on chromosomes 3 and 4. We provide fine mapping of the QTLs on chromosome 4 and the association between the QTLs and anther length, which has been reported to be a major component of cold tolerance. Interval mapping using a segregating population derived from an advanced backcross progeny indicated that a QTL for cold tolerance is probably located from the center to the proximal end of the introgression. For fine mapping, we developed a set of near-isogenic lines (NILs) from recombinants in the segregating population. Comparison of cold tolerance between the NILs indicated that either the proximal end or the center of the introgression is necessary for cold tolerance. From these results, we concluded that there are at least two QTLs for cold tolerance, tentatively designated as Ctb-1 and Ctb-2. in the introgression on chromosome 4. The map distance between Ctb-1 and Ctb-2 is estimated to be 4.7-17.2 cM. In order to investigate the mechanism underlying cold tolerance by the QTLs, we compared anther lengths of the NILs. The results indicate that both Ctb-1 and Ctb-2 are associated with anther length.

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Documento generato il 10/04/20 alle ore 02:29:35