Principles of Plant Genetics and Breeding

508 CHAPTER 29
Part A
Please answer the following questions true or false:
Outcomes assessment
1 Commercial classification of rice is based primarily on grain length.
2 The basic chromosome number of the genus Oryza is 12.
3 Rice is predominantly cross-pollinated.
4 Most of the world’s rice production occurs in irrigated ecosystems.
Part B
Please answer the following questions:
1 Give the three ecogeographic classes of rice.
2 List four major quality breeding objectives in rice breeding.
3 Describe the distinguishing features of the japonica class of rice.
Part C
Please write a brief essay on each of the following topics:
1 Discuss the commercial classes of cultivated rice.
2 Discuss the common methods of breeding rice.
3 Discuss the genetics of grain color in rice.
4 Discuss the importance of the “wild abortive” gene in rice breeding.