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Hybrid Rice Seed Production Techniques (HRSPT)

2
Jul

The Spikelet

1. One flower makes up the spikelet, which consists of a rachilla (a small axis) bearing a single floret.

2. The spikelet is borne on the pedicel, a short stalk that is an extension of the panicle axis and the primary or secondary branch.

3. There are two short rudimentary glumes at the upper end of the pedicel.

4. A pair of sterile lemmas and the rachilla is located between the rudimentary glumes and the spikelet.

5. The flower is enclosed in the lemma and palea, which may be either awned or awnless.

File Courtesy: 
Morphological and Floral Characteristics of Rice ( Dr. A. S. Hari Prasad DRR)
2
Jul

Rice Inflorescence

1. The inflorescence of rice is a terminal panicle with single flowered spikelets, borne on a long peduncle, which is the last internode of the culm.

2. The junction of the peduncle with the axis of the main inflorescence is marked by a ciliate ring.

3. The portion of the peduncle from the juncture of the flag-leaf to the ciliate ring, which is exposed, is termed as 'exsertion'. Rice varieties differ in the degree of exsertion.

File Courtesy: 
Morphological and Floral Characteristics of Rice( Dr. A. S. Hari Prasad DRR)
Photo Courtesy: 
http://www.google.co.in/images
2
Jul

Reproductive Parts of the Rice Plant

Reproductive parts of the rice plant include
1.Inflorescence
2.Spikelet
3.Stamens
4.Stigma

File Courtesy: 
Morphological and Floral Characteristics of Rice( Dr. A. S. Hari Prasad DRR)
2
Jul

Parts of a Rice Seed

 1. The embryo or germ gives rise to a seedling, which is composed of the shoot and roots.

2. The endosperm is a food reserve for the germinating embryo during its early growth.

3. The endosperm is made up mostly of starch. It also contains sugars, proteins, and fats.

4. The hull is the hard cover of the seed.

5. Most of the improved rice cultivars either do not have awns, or the awn is very small.

File Courtesy: 
Morphological and Floral Characteristics of Rice ( Dr. A. S. Hari Prasad DRR)
Photo Courtesy: 
http://www.knowledgebank.irri.org/hybridriceseed/Parts_of_a_Seed.htm
2
Jul

Suitable Season for Hybrid Rice Cultivation

1. Rice hybrids can be grown both in kharif as well as rabi seasons.

2. The long duration hybrids should not be cultivated during rabi season and even for medium duration hybrids.

3. Care should be taken to see that plantings are not delayed, otherwise the flowering may coincide with high temperatures in April/May, thus adversely affecting yields.

File Courtesy: 
Agro Techniques for Hybrid Rice Cultivation and Seed Production - 2005, DRR Training Manual
2
Jul

Season

1. Autumn: Generally, the Autumn or Pre-Kharif season lasts from March-May to June-October. The rice that is grown in Autumn is called Autumn rice or pre-kharif rice.

2. Kharif / Winter: Kharif or Winter is the main rice growing season in the country. It is known as Winter Rice or Kharif Rice as per the harvesting time. The winter crop sowing takes place between June and October and harvesting is done between November and April

File Courtesy: 
Agro Techniques for Hybrid Rice Cultivation and Seed Production - 2005, DRR Training Manual
2
Jul

The Seed and Grain

 

1. A mature rice grain that germinates under favourable environmental conditions and grows into a normal plant is called a seed.

2. A mature rice grain that may or may not germinate and is used for consumption is not a seed.

3. Only seeds are sold to farmers to grow a rice crop.

File Courtesy: 
Morphological and Floral Characteristics of Rice( Dr. A. S. Hari Prasad DRR)
Photo Courtesy: 
Dr. Hari Prasad ( DRR)
2
Jul

The Rice plant

1. Rice (Oryza sativa) is an aquatic grass, native to tropical and subtropical south-eastern Asia and to Africa.

2. The plant, which needs both warmth and moisture to grows 2-6 feet tall and has long, flat, pointy leaves and stalk-bearing flowers (Spikelet) which produce the grain known as rice.

3. Rice is rich in genetic diversity, with thousands of varieties grown throughout the world.

File Courtesy: 
Agro Techniques for Hybrid Rice Cultivation and Seed Production - 2005, DRR Training Manual
Photo Courtesy: 
Dr. A.S.Hari Prasad (DRR)
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