Clonal Propagation as a Practical Means of Exploiting Hybrid Vigour in Rice

Richharia, R. H.

doi:10.1038/194598a0

Cited by 5 publications

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“…Although rice has some advantages over wheat in hybrid breeding as its seed rate is lower, and it can be transplanted, ratooned and propagated by tiller separation (RICHHARIA, 1962), still heterosis in this crop could not be exploited commercially. The recent discoveries of a cytoplasmic male sterility and genie fertility restoration system in rice, reported by several workers (Shinjyo & OMURA, 1966;SHINJYO, 1969;ERICKSON, 1969;ATHWAL & VIRMANI, 1972) seem to solve this problem and producing hybrid seed on commercial basis at reasonably low costs may be feasible.…”

Section: Discussionmentioning

confidence: 99%

A study on heterosis in rice (Oryza sativa L.)

1974

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Heterosis for yield and four yield components, viz. panicle number per plant, panicle length, spikelet per panicle and lOOO-grain weight, was studied in fifteen crosses involving six varieties of rice, Uryza sutiva L. Positive and significant heterosis for yield was observed in 11 and 8 crosses, over the midparent and the better parent, respectively. Hamsa x Hybrid 27 gave the highest heterosis both over the mid-parent (156.23 %) and the better parent (136.38%) followed by Jaya x Norin 18 with respective values of 155.18 and 56.29%.As compared with the average yield of 36.54 g per plant of the high yielding commercial variety, viz.

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Section: Discussionmentioning

confidence: 99%

A study on heterosis in rice (Oryza sativa L.)

1974

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“…Research on commercial exploitation of heterosis in rice has been carried out in different countries (Richaria, 1962;Stansel and Craigmiles, 1966;Virmani, 1994). Murayama et al (1974) discussed the advantages of utilizing hybrid vigour under field conditions.…”

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Physio-Morphological Characters of F¹ Hybrids of Rice (Oryza sativa L.) in Japonica-Indica Crosses: II. Heterosis for leaf area and dry matter accumulation

Sarker

Murayama

Ishimine

et al. 2001

Plant Production Science

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A pot experiment was conducted to investigate the heterosis for morphological characters and to examine the relationship among some characters at active tillering, flowering and dough ripe stages of 12 F 1 hybrids from crosses between japonica and indica rice. Heterosis for plant height, number of tillers, green leaf area and dry matter accumulation per plant was positive at all stages. The intensity of heterosis was higher at the active tillering stage for number of tillers, leaf area and dry matter accumulation per plant. A significant positive relationship was found between tiller number and leaf area per plant at active tillering and flowering stages. Significant positive relationships between leaf area and dry matter accumulation, and between tiller number and dry matter accumulation per plant were observed at all stages. A significant positive relationship was found between leaf area per plant at an early stage and dry matter accumulation per plant at a later stage, suggesting that early development of leaf area is an important factor for higher dry matter accumulation in F1 hybrids. Although heterosis for percent dead leaf blade was positive at the flowering stage due to early leaf senescence in some F 1 hybrids, a larger leaf area was also found in F 1 hybrids at this stage and leaves of F1 hybrids remained green longer compared to parent cultivars up to the dough ripe stage.

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Rice Breeding

Gopala Krishnan,

Vinod,

Bhowmick

et al. 2022

Fundamentals of Field Crop Breeding

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Clonal Propagation as a Practical Means of Exploiting Hybrid Vigour in Rice

Cited by 5 publications

References 0 publications

A study on heterosis in rice (Oryza sativa L.)

A study on heterosis in rice (Oryza sativa L.)

Physio-Morphological Characters of F¹ Hybrids of Rice (Oryza sativa L.) in Japonica-Indica Crosses: II. Heterosis for leaf area and dry matter accumulation

Rice Breeding

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Clonal Propagation as a Practical Means of Exploiting Hybrid Vigour in Rice

Cited by 5 publications

References 0 publications

A study on heterosis in rice (Oryza sativa L.)

A study on heterosis in rice (Oryza sativa L.)

Physio-Morphological Characters of F1 Hybrids of Rice (Oryza sativa L.) in Japonica-Indica Crosses: II. Heterosis for leaf area and dry matter accumulation

Rice Breeding

Contact Info

Product

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Physio-Morphological Characters of F¹ Hybrids of Rice (Oryza sativa L.) in Japonica-Indica Crosses: II. Heterosis for leaf area and dry matter accumulation