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New Temperature Sensitive Genic Male Sterile Lines with Better Outcrossing Ability for Production of Two-Line Hybrid Rice

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An investigation was carried out with three newly developed temperature sensitive genic male sterile (TGMS) lines for their floral traits, seed production potential and outcrossing ability in ten cross combinations. In the TGMS lines, fertile pollens had an average diameter of 0.89 mm while the sterile pollens was with 0.02 mm diameter.TS-29-150GY produced the biggest fertile pollens with 0.92 mm and other two lines produced relatively smaller pollens with 0.91 and 0.85 mm. Pollen fertility during the fertility reversion period was an average of 60.7%. TS-29-150GY had the maximum of 66.9% spikelet fertility whereas other two lines (TNAU18S and TNAU60S) had relatively lower spikelet fertility of 27.8% and 26.7%, respectively. Average of 17.00 g of seed yield was obtained in the TGMS lines during the fertility reversion period. TS-29-150GY had the highest value of 21.20 g of seed yield while TNAU18S and TNAU60S produced 16.6 g and
13.2 g of seed yield, respectively. The low seed production ability of these three TGMS lines was attributed
only to the environmental conditions prevailing during the period. All three TGMS lines had considerable
outcrossing potential of 41.2%, 24.6% and 25.0%, respectively. The cross combinations viz. TNAU18S/IET21508 (36 g/plant), TNAU18S/IET21044 (13 g/plant), TNAU18S/IET21009 (26.5 g/plant),TNAU60S/CB-09-106 (26.2 g/plant), TNAU60S/IET21009 (14 g/plant) and TS29-150-GY/DRR 3306 (39.2 g/plant) showed perfect synchronization with acceptable hybrid seed yield, indicating suitability of TGMS system under Indian condition. Based on the outcrossing related traits viz. panicle exertion, angle of glume opening, stigma length and pollen size, TNAU18S was identified as the best, followed by TS-29-150GY.

Key words: temperature sensitive genic male sterile line; outcrossing; floral trait; hybrid rice

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Ketersediaan

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Informasi Detail

Judul Seri

Rice Science

No. Panggil

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Penerbit

: Elsevier Science Inc.., 2015

Deskripsi Fisik

Rice Science, 2015, 22(1): 49−52

Bahasa

English

ISBN/ISSN

-

Klasifikasi

NONE

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

2015, 22(1)

Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

Wati/Agus

Versi lain/terkait

Lampiran Berkas

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