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Junko YAMAGUCHI, Toshio SHIGA
1993 Volume 43 Issue 2 Pages
173-182
Published: June 01, 1993
Released on J-STAGE: April 18, 2008
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Takashi SATO, Daiji ASAKA, Takeo HARADA, Isao MATSUKAWA
1993 Volume 43 Issue 2 Pages
183-191
Published: June 01, 1993
Released on J-STAGE: April 18, 2008
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Hiroshi EZURA, Hiroshi AMAGAI, Katsuji OOSAWA
1993 Volume 43 Issue 2 Pages
193-199
Published: June 01, 1993
Released on J-STAGE: April 18, 2008
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Chika AOKI, Yoshihiro FUJINO, Naoyuki MIWA, Takao NISHIMURA, Kazumi HA ...
1993 Volume 43 Issue 2 Pages
201-206
Published: June 01, 1993
Released on J-STAGE: April 18, 2008
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Hiroshi ISHIZAKA, Junjiro UEMATSU
1993 Volume 43 Issue 2 Pages
207-218
Published: June 01, 1993
Released on J-STAGE: April 18, 2008
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Kohji UCHIDA, Hirofumi YAMASHITA, Yoshihiko TSUMURA, Chiemi TAKAHASHI, ...
1993 Volume 43 Issue 2 Pages
219-230
Published: June 01, 1993
Released on J-STAGE: April 18, 2008
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Hisato KUNITAKE, Toshinari GODO, Masahiro MII
1993 Volume 43 Issue 2 Pages
231-238
Published: June 01, 1993
Released on J-STAGE: April 18, 2008
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Mihoko TAMURA, Ryutaro TAO, Akira SUGlURA
1993 Volume 43 Issue 2 Pages
239-245
Published: June 01, 1993
Released on J-STAGE: April 18, 2008
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KOBAYASHI.Nobuya, Ryoichi IKEDA, Duncan A. VAUGHAN
1993 Volume 43 Issue 2 Pages
247-255
Published: June 01, 1993
Released on J-STAGE: April 18, 2008
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Kazunori SUZUKI, Masao ISHIMOTO, Fumio KIKUCHI, Keisuke KITAMURA
1993 Volume 43 Issue 2 Pages
257-265
Published: June 01, 1993
Released on J-STAGE: April 18, 2008
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Yasuhiko OGI, Hiroshi KATO, Kiyoaki MARUYAMA, Fumio KIKUCHI
1993 Volume 43 Issue 2 Pages
267-275
Published: June 01, 1993
Released on J-STAGE: April 18, 2008
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Michio KANBE, Fumihiro FUJIMOTO, Susumu INAMI
1993 Volume 43 Issue 2 Pages
277-287
Published: June 01, 1993
Released on J-STAGE: April 18, 2008
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Alfalfa varieties and strains were evaluated for their resistance to Sclerotileia trlfoliorum ERIKS., the casual agent of Sclerotinia crown and stem rot (SCR) which is a serious disease in areas characterized by a warm and wet climate. Three experiments were carried out from 1983 to 1985, one under natural conditions for the infection and two under artificial inoculation in test fields. For the tests under artificial inoculation, all the varieties and strains were sowed in the field in September and were inoculated with cultured hyphae of SCR on the basal part of the plants in December. The disease severity was observed after 4 - 6 weeks. The symptoms of the disease were enhanced by the use of covering treatments after inoculation, and varietal differences in the severity of the disease were recognized based on the percentages of the plants which survived (Tables 3, 4, 5). A high correlation coefficient (r = - 0.798
**) was obtained between the survival rate under artificial inoculation and the disease severity under natural infection (Fig. 1). It was suggested that this inoculation method which used hardening under natural conditions enabled to evaluate the resistance to SCR.
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Kazuyuki ABE, Yoshihiko SATO, Toshhiro SAITO, Akio KURIHARA, Kazuo KOT ...
1993 Volume 43 Issue 2 Pages
289-298
Published: June 01, 1993
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Inheritance of ripening time of Japanese pear was investigated using twenty full-sib families. Frequency distribution in each family could be approximated to normal distribution, indicating that this character was inherited polygenically (Fig. 1). Significant regression coefficients and correlation coefficients were obtained between mid-parent and offspring; the regression was in the range of 0.867∼1.045, the correlation being 0.916∼0.985 (Table 3). Both regression coefficients and correlation coefficients, obtained between mid-parent and offspring in the full-sib population, are generally recognized as valuable genetic parameters. Especially, the regression of offspring on mid-parent in the random mating population is expected to be equal to the estimate of the heritability. Therefore the eritability on ripening time is considered to be extremely high (Table 3). Variance analysis indicated that variances between and within family were significant. Variances due to year and interaction between family and year were not significant (Table 7). The ratios of variance due to family, year, interaction between family and year, individual and error to the total variance were estimated to be 0.341, 0.003, 0.005, 0.612 and 0.039 respectively. Arnong the ratios of variance cornponent, those due to family and individual were both high (Table 8). It is concluded that ripening time in Japanese pear population has a heritability as high as 0.95 (Table 3), and environmental variance of this character is relatively small(Table 8).
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BOUBAKER Mohsen, YAHYAOUI Amor, Nobuyuki KURAUCHI, Toshiaki YAMADA
1993 Volume 43 Issue 2 Pages
299-305
Published: June 01, 1993
Released on J-STAGE: April 18, 2008
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