Pleiotropic effect of the dwarfing gene <i>d18‐k</i> on cool tolerance at booting stage under the genetic background of an extremely cool‐tolerant line Norin‐PL8 in rice

Murai, Masayuki; Kc, Hari Bahadur; Gima, Naoya; Jung, Chan Jin

doi:10.1046/j.1439-0523.2003.00843.x

Cited by 3 publications

(17 citation statements)

References 25 publications

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“…spikelet fertility (%), was calculated. Besides spikelet fertility, the two indices used in the previous study (Murai et al 2003) were adopted to measure the extent of cool damage in each treated panicle, as follows. SN-T/C: the ratio (%) of the spikelet number of each treated panicle to the varietal mean of the same trait in the control was calculated, for estimating the percentage of spikelet degeneration caused by cool temperature.…”

Section: Evaluation Of Cool Tolerancementioning

confidence: 99%

“…The treated panicles in each line were grouped in accordance with the number of days before flowering from the final day of the CA or DW treatment, and the mean value of each day-group was calculated for spikelet fertility, SN-T/C and FS-T/C, in order to examine the relation between cool susceptibility and panicle development stages. In previous papers (Murai et al 1991a, 1991b, Murai et al 2003, the L 5 , viz. the mean value of the lowest five spikelet fertilities on five consecutive days in each line/cultivar, was used for evaluating the cool tolerances of lines and cultivars.…”

Section: Evaluation Of Cool Tolerancementioning

confidence: 99%

“…Norin-PL11, officially registered after the release of Norin-PL8, is equal to or more cool-tolerant than Norin-PL8; its cool tolerance was derived from a landrace of Borneo (Saito 1988, Saito andAbe 1990). In the previous study, Murai et al (2003) demonstrated that d18-k exerts its effect of enhancing cool tolerance under the genetic background of Norin-PL8. In the present study, two cool-air treatments with and without deep water at the booting stage were performed for Norin-PL11 and its isogenic line carrying d18-k, in order to investigate the effect of d18-k on the cool tolerance under the genetic background of Norin-PL11.…”

Section: Introductionmentioning

confidence: 96%

“…the increase of differentiated pollen grain number per anther and the decrease of cool-temperature injury to pollen development (Murai et al 1991a(Murai et al , 1991b(Murai et al , 2003. Moreover, d18-k produces the characteristic panicle type with fewer secondary branches (Murai andKinoshita 1983b, Murai 1999), resulting in less cool-temperature damage in spikelet number per panicle (Murai et al 2003).…”

Section: Introductionmentioning

confidence: 99%

“…An officially-registered line Norin-PL8 is more cooltolerant at the booting stage than 'Hayayuki', the most cooltolerant cultivar of Hokkaido, which carries genes for cool tolerance derived from a Indonesian javanica landrace 'Silewah' (Abe et al 1989, Saito et al 1995, Murai et al 2003. Norin-PL11, officially registered after the release of Norin-PL8, is equal to or more cool-tolerant than Norin-PL8; its cool tolerance was derived from a landrace of Borneo (Saito 1988, Saito andAbe 1990).…”

Section: Introductionmentioning

confidence: 99%

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Effect of the Dwarfing Gene d18-k on Cool Tolerance at Booting Stage under the Genetic Background of an Extremely Cool-tolerant Rice Line Norin-PL11, and its Relation with Water Depth

Murai

Yoshida

2003

Breed. Sci.

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Norin-PL11 (PL11) is a highly cool-tolerant line which contains genes for cool tolerance introduced from 'Padi Labou Alumbis', a landrace of Borneo. We investigated whether the dwarfing gene d18-k (kotaketamanishiki dwarf) exerts its pleiotropic effect of enhancing the cool tolerance at the booting stage under the genetic background of PL11, using the d18-k isogenic line of the recurrent parent PL11 (D11). During the booting stage, two cool-air treatments at 12°C for five days with and without deep water of 15 cm depth (DW and CA treatments, respectively) were conducted in growth chambers illuminated at about 600 Omol PAR m −2 s −1 . Besides spikelet fertility, the ratio (%) of the fertilized-spikelet number of each treated panicle to the varietal mean of fertilized-spikelet number per panicle in the control, viz. FS-T/C was adopted in order to estimate the extent of cool damage including the factor of spikelet degeneration. The CA treatment induced notable spikelet degeneration in PL11, but not in D11. The parameter L 5 , which is the average of the lowest five FS-T/C values (or spikelet fertilities) on five consecutive days in each line, was used for evaluating the cool tolerances of the lines. In the CA treatment, D11 had a higher L 5 in FS-T/C than PL11, indicating that D11 is more cool-tolerant than PL11. D11 showed a significantly higher L 5 of FS-T/C in the DW treatment than in the CA treatment, but PL11 showed no significant difference of L 5 between the CA and DW treatments. Similar results were obtained for spikelet fertility. In D11, almost the whole panicle at the most susceptible stage was under the surface of the deep water. On the other hand, the whole panicle was above the water surface at that stage in PL11. Consequently, D11 almost eluded the damage from the severe cool-air treatment when combined with the deep water. D11 exceeded PL11 not only in ripened pollen grain number per anther in the control but also in an indicator of pollen fertility after the CA treatment, owing to the effects of d18-k. It is concluded that d18-k may be useful for developing super-highly cool-tolerant cultivars for cool-weather areas.

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Section: Evaluation Of Cool Tolerancementioning

confidence: 99%

Section: Evaluation Of Cool Tolerancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of the Dwarfing Gene d18-k on Cool Tolerance at Booting Stage under the Genetic Background of an Extremely Cool-tolerant Rice Line Norin-PL11, and its Relation with Water Depth

Murai

Yoshida

2003

Breed. Sci.

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Genetic progress for floral morphology under different nitrogen of rice cultivars in Japan

Shimono,

Sato,

Abe

et al. 2024

Agronomy Journal

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Reproductive development of rice (Oryza sativa L.) is critical for obtaining high yield by promoting fertilization at the flowering stage. However, limited information is available about historical changes in anther and stigma morphology during breeding programs; these characteristics contribute strongly to a cultivar's abiotic stress resistance. We tested the hypothesis that genetic progress for culm length during breeding has affected the floral morphology of rice cultivars released in Japan. We used field trials in 2 years in northern Japan to quantify anther and stigma morphology and culm length for rice from 147 cultivars (2020) and 284 cultivars (2021) that had been released from 1902 to 2011 (109 years) in Japan under two nitrogen (N) regimes (no‐N and high‐N). Culm length significantly decreased over time at a rate of 1.9–3.1 cm per 10 years at low N. However, anther length, anther width, and stigma length showed no consistent trend during the period. High N significantly increased culm length of most cultivars by an average of 21%–26% but tended to shorten anther length by 2%–3% and anther width by 1%–2% on average and increased stigma length by only 1%, with large variation among cultivars. Our results suggested no evidence on positive breeding efforts targeting on floral morphology to improve abiotic stress tolerance and yield in contract with culm length.

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Effects of Dwarfing Genes on Chilling Tolerance at Seedling Stage in Rice

Murai

Ise

et al. 2006

JARQ

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The effects of sd1-d, sd1-r and sd1-c at the sd1 locus, d18-k (kotaketamanishiki dwarf) and d12 (yukara dwarf) on the chilling tolerance at the seedling stage were examined. We used isogenic lines regarding the dwarfing genes/alleles, together with their parental varieties 'Fujiminori', 'Shiokari', 'Tamanishiki', 'Calrose', Taichung 65, Norin-PL8 and Norin-PL11. Chilling treatments at 2ºC for three, four and five days were conducted at the 1-and 2-leaf stages. The chilling tolerances of the lines were evaluated by survival percentages after the treatments. The d12 lowered the chilling tolerance. The sd1-d and sd1-c lowered the chilling tolerance on the less tolerant genetic backgrounds of 'Fujiminori' and 'Shiokari', whereas this effect did not appear on the more tolerant genetic backgrounds of Taichung 65 and 'Calrose'. The d18-k enhanced the chilling tolerance on the less tolerant genetic backgrounds of 'Shiokari' and 'Tamanishiki', whereas the effect did not appear on the more tolerant genetic backgrounds of Norin-PL8 and Norin-PL11. Consequently, d18-k could be utilized to develop varieties adaptable to areas readily damaged by unseasonably low temperatures at all of the susceptible growth stages of rice, because d18-k is known to enhance the cool tolerances at both the booting and flowering stages also.

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Pleiotropic effect of the dwarfing gene d18‐k on cool tolerance at booting stage under the genetic background of an extremely cool‐tolerant line Norin‐PL8 in rice

Cited by 3 publications

References 25 publications

Effect of the Dwarfing Gene d18-k on Cool Tolerance at Booting Stage under the Genetic Background of an Extremely Cool-tolerant Rice Line Norin-PL11, and its Relation with Water Depth

Effect of the Dwarfing Gene d18-k on Cool Tolerance at Booting Stage under the Genetic Background of an Extremely Cool-tolerant Rice Line Norin-PL11, and its Relation with Water Depth

Genetic progress for floral morphology under different nitrogen of rice cultivars in Japan

Effects of Dwarfing Genes on Chilling Tolerance at Seedling Stage in Rice

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