HYBRID RICE SPECIAL CROSSWORD
developed by:
John C. de Leon
Supvg. SRS and Program Leader
Hybrid Rice, PhilRice Maligaya, Science City of Muñoz
3119 Nueva Ecija PHILIPPINES
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ACROSS{tc "ACROSS"}
1. Qualitative description of the yield benefit derived from hybrid rice
3. A genetically engineered organism and what Mestizo hybrid rice is not
5. Easy nutrient deficiency test based on plant reaction (abbrev.)
8. Institution that bred the Philippine hybrid rice variety Mestizo (acronym)
9. A type of environment-sensitive genetic male sterility
11. A natural agent for pollen transfer in some hybrid crops, e.g., cotton
12. Source of nutrient and energy in the soil; important for plant growth (abbrev.)
13. A major disease of cultivated rice, especially during the rainy season (abbrev.)
14. Maturity of Mestizo hybrid in qualitative terms
15. Gene that induces panicle exsertion through the elongation of the uppermost internode
16. Estimate of heterosis based on comparison with a check or standard variety (initials, 2 words)
18. The A and R lines flowering at the same time
22. Representing the rice crop in the PSB/NSIC system of varietal nomenclature
23. Farmers’ association (initials, 2 words)
26. Generally, the cropping season from June to November
27. Insect pest that causes deadhearts and whiteheads (initials, 2 words)
28. Opposite of cross-pollinating
29. Irrigated lowland
30. First hybrid rice variety released in the Philippines in 1994
32. One of the 11 pilot provinces in Central Luzon for hybrid rice technology demonstration in
1998 (initials, 2 words)
33. A community-based baiting system to control rat infestation of rice fields (initials, 3 words)
35. First country to demonstrate the commercial feasibility of hybrid rice
36. A Chinese unit of land area equal to 0.518 acre or about 615 m2
37. Improves seed-setting in indica x japonica hybrids and conferred by, e.g., the S-5n gene
(initials, 2 words)
38. In-charge of seed quality control under the BPI (acronym)
41. Covers variety ownership, restrictions in germplasm exchange and gene patenting issues,
among others (initials, 2 words)
42. The B-line
44. Three major fertilizer
elements applied to the rice crop
45. The fertilizer formulation 21-0-0 when simply abbreviated (initials, 2 words)
46. Brown rice length of most Philippine rice grains measuring 6.6 to 7.5 mm (initials, 2 words)
49. Ratios like 2:8, 2:10, 2:12 in AxR
51. CMS classification other than wild abortive (WA) and Hong-Lien type widely utilized, e.g.,
by Li Zhengyou
53. Iodine potassium iodide, e.g.
54. Seed standard particularly critical for hybrids
55. Not similar in genetic constitution, e.g.
56. The best season to grow Mestizo and other high yielding rice varieties (initials, 2 words)
DOWN
1. Hybrid vigor
2. The R-line in farmer and seed grower parlance
3. The G in GA3
4. Method of hybrid seed production possible with apomixis
5. High yielding, aromatic, and the most popular hybrid rice variety in the Philippines to date
6. A method of isolating hybrid seed production plots
7. Deficiency symptoms for this element include brown blotches and streaks in lower leaves and
stunted growth
10. A form of selection in which individual plants are selected and the next generation propagated
from the aggregate of their seeds
17. Seed produced in AxR
19. To hybridize and combine parental line traits
20. Nationwide testing of promising hybrid rice combinations and inbreds implemented by the
Rice Varietal Improvement Group
21. Seed class above the breeder normally produced through paired crossing
22. The pollen parent in the three-line system
24. Parental lines to cross to produce the seeds of the CMS line in a three-line system
25. Pioneer of hybrid rice breeding in China referred to as the “father of hybrid rice”
29. The combined use of organic and inorganic fertilizers accompanied by sound cultural
practices in crop production (initials, 3 words)
30. An off-type that must be rogued
31. Chemical used in hybrid seed production as growth enhancer
33. The recommended amount of F1seeds of Mestizo for one hectare (in kilogram)
34. Breeding method normally used to develop new CMS lines (abbrev.)
38. Hybrid rice seed production practice to enhance seed setting using ropes or bamboo stakes
(initials, 2 words)
39. The A-line
40. Seed-growers association
41. Potassium iodide (chemical symbol)
43. Typical rice varieties characterized by homozygosity or high uniformity in crop stand
47. Rf, tgms1, Xa21, e.g.
48. Growth stage for primordial sampling in AxR
50. A group composed of inter-agency representatives that oversees the implementation of the
‘Dagdag Ani, Dagdag Kita’ hybrid rice commercialization program of the national government
in the provinces (acronym, 3 words)
51. Government agency in charge of the agrarian reform communities
52. Advance yield trial
53. Standard evaluation system
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