TY - JOUR
T1 - Effectiveness of three-way crossing for the breeding of yellow-flowered evergreen azalea
AU - Ureshino, K.
AU - Miyajima, I.
AU - Akabane, M.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 1998
Y1 - 1998
N2 - For the purpose of obtaining yellow-flowered evergreen azaleas, single and three-way interspecific crosses between evergreen azaleas and Rhododendron japonicum f. flavum were compared. In single cross, although many seeds were obtained from R. eriocarpum x R. japonicum f. flavum, the seedlings from immature ovule were albino or pale-green plants. They were withered away at acclimation. In R. kiusianum x R. japonicum f. flavum, green seedlings were observed, but number of ovules contained in one capsule was very small. In three-way cross, (R. kiusianum x R. eriocarpum) x R. japonicum f. flavum, many viable seeds were contained in one capsule, and about 15% of the seedlings were green leaf colored. These results suggest that three-way cross is one of the useful breeding methods for creating the new yellow-flowered evergreen azalea. Isozyme analysis revealed that most of seedlings were zygotic origin without distinction of their leaf colors, but some green seedlings indicated the same genotypes as the seed parents. Therefore, it is important to confirm hybridity of the seedlings by isozyme technique.
AB - For the purpose of obtaining yellow-flowered evergreen azaleas, single and three-way interspecific crosses between evergreen azaleas and Rhododendron japonicum f. flavum were compared. In single cross, although many seeds were obtained from R. eriocarpum x R. japonicum f. flavum, the seedlings from immature ovule were albino or pale-green plants. They were withered away at acclimation. In R. kiusianum x R. japonicum f. flavum, green seedlings were observed, but number of ovules contained in one capsule was very small. In three-way cross, (R. kiusianum x R. eriocarpum) x R. japonicum f. flavum, many viable seeds were contained in one capsule, and about 15% of the seedlings were green leaf colored. These results suggest that three-way cross is one of the useful breeding methods for creating the new yellow-flowered evergreen azalea. Isozyme analysis revealed that most of seedlings were zygotic origin without distinction of their leaf colors, but some green seedlings indicated the same genotypes as the seed parents. Therefore, it is important to confirm hybridity of the seedlings by isozyme technique.
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U2 - 10.1023/A:1018661004467
DO - 10.1023/A:1018661004467
M3 - Article
AN - SCOPUS:0031786587
VL - 104
SP - 113
EP - 118
JO - Euphytica
JF - Euphytica
SN - 0014-2336
IS - 2
ER -