Origin

The line that gave rise to the variety INIFLAR RT, comes from a triple cross between the materials CT10825-1-2-1-3 x FEDEARRROZ 50 and later with FLO2066-4P1-1P-M, made by the FLAR at its headquarters at the International Center for Tropical Agriculture in Palmira, Colombia.

Selections in field: 

*The coding of lines generated in the Latin American Fund for Irrigated Rice (FLAR) in Colombia called as line F¹ to the naked seed (without lemma and palea) from a cross, not the plant that is what we call or use in our country as F₁.

Evaluations in Mexico

The FLO4621-2P line-1-3P-3P-M was introduced to Mexico through Nurseries Observing FLAR-VIOFLAR 2005, and was included in the Preliminary Performance Testing (PPR) in 2005, reevaluated in 2009 the dry tropics (two years). Since its introduction in Tabasco in 2007 as a member of nursery VF-2005 held good agronomic and productive behavior under irrigation and temporary, why was proposed for inclusion in the first national performance test which was established in 2011 in different rice-growing areas. On the plot of validation in 2007 their property was late and moisture conditions were unfavorable; however, he confirmed its acceptable response underrainfed conditions to yield 4.286 t ha^-1 beating the variety Choca A05, temporalera variety.

Evaluation national yield trials (ENR) 2011 and 2012, humid tropics and dry tropics

In these evaluations new packages were detected and characterized rice genotypes thin long grain high yield potential, disease resistance and abiotic factors, with acceptable grain quality for inclusion in future studies and for escape as new varieties to join technology that will help improve the profitability of the crop. The national performance test (ENR) was established at five sites, three of irrigation: Tomatlan, Jalisco; Parácuaro, Michoacán; and Ebano, S. L. P. and two temporary: Tuxtepec, Oaxaca and Huimanguillo, Tabasco. The agronomic and laboratory variables were recorded. In the statistical analysis of the compact performance test (ECR), the genotype x environment and study of stability parameters under different environments of the humid tropics and dry tropics that characterize rice producing regions in Mexico in 2013. This trial interaction was determined it was formed with the elite lines nationwide expressed best behavior, was established in the states of Nayarit, Morelos, Michoacan, Veracruz, Tamaulipas, Tabasco and Jalisco. Thus, the ECR-2013 was formed with three genotypes and three control varieties. The validation at national level under irrigation and temporary, humid tropics and dry tropics and confirmation of the industrial quality of grain in the laboratory Rice Field Experimental Zacatepec, Mor. was performed. Subsequently it sets for release as "INIFLAR RT" and foundation seed produced by the method of genealogical affiliation in the Experimental Zacatepec, Morelos (dry tropics) in 2014.

Variety description INIFLAR RT

Flowering: in the state of Michoacan under irrigation, flowering occurred at 108 days after planting and in the state of Tabasco, in time, flowering occurred 85 days. In general, the flowering season occurs early, stem length is short, with the absence of male sterility, the color of the stigma is white, the length of the major axis of the panicle is medium, has an average range of panicles per plant and with no edge, pubescence spikelet (slogan) is average and the color of the end is yellowish, carrying panicle is semi- erect and has secondary branch type 1, carrying branches are semi-erect and exception panicle is moderately excert (^{UPOV, 2004}).

Maturity: days to physiological maturity of the variety INIFLAR RT occurred differently for environments evaluated. For the state of Tabasco, grain maturity occurred at 125 days after planting (dds) and the state of Michoacan, occurred at 140 dds. Compared the present variety Aztecas maturity to 151 days to cycle autumn-winter sowings and plantings 96 days P-V (^{Aguirre et al., 2013}). According to the characterization of the material, the age of maturity is early and the time of senescence leaf is early, the color theme is light golden unadorned in it, there is an absence of pigmentation in the keel and the area low apex, the length of the glume is short and a straw color; the length, width and weight of one thousand grains is fully developed medium, palay thousand kernel weight is 26.2 g and 19.5 g in grinding grain. The length and width are cariópside media, the way is half fusiform (side view) and white (^{UPOV, 2004}).

Characteristics of grain quality: the percentage of whole grains was different for each environment. In 2013, in the state of Morelos 56% was obtained for the state of San Luis Potosi 65%, 62% in Michoacan and in Ebano only 38% whole grain. A year later, the nationwide validation and confirmation of milling quality was performed, the results indicated a good quality, long-grain thin and translucent. The appearance of the grain is completely crystalline and slightly opaque. It presents a nonglutinous endosperm type, amylose content is greater than 30%, the alkaline digestion is completely digested and the caryopsis no aroma. The cooking and tasting test indicated that the grain is high quality agree to the parameters established for this type of rice.

Adaptation and performance: INIFLAR RT is a variety of early rice with high and stable yield potential under irrigation, both in the humid tropics and dry and moderate yield under rainfed conditions in the humid tropics; it is resistant to lodging and fungal diseases such as "tainted grain" burning rice (Pyricularia) complex. The results of the evaluation in the compact performance test (ECR) held in 2013 under different environments, shown in Table 1.

Table 1 Grain yield of the variety INIFLAR RT in different environments in 2013. 

Grain yield of the variety INIFLAR RT was highly variable in each test site. On average, the variety INIFLAR RT obtained a yield of 7.2 t ha^-1 compared to the commercial variety which won the Silverio 6.8 t ha^-1.

Despite the variability in grain yield of the variety INIFLAR RT, the average yield in 2014 remained the same as in the cycle 2013 with 7.1 t I ha^-1 (Table 2), in some states did better yields in 2013 while for others it was during 2014.

Table 2 Grain yield of the variety INIFLAR RT in different environments in the spring-summer cycle, 2014. 

Variability in grain yield of the variety INIFLAR RT coincides with research by ^{Orona (2013)} from 2008 to 2011 in Campeche, where he conducted a comparative study with the aim of studying the adaptability and yield stability of 18 rice genotypes two thin grain producing regions, the results showed highly significant differences in grain yield of different genotypes in both regions. The knowledge of the behavior of new rice varieties in response to genotype by environment interactions, it is important for future breeding strategies as introduction of new materials rice (^{Amador et al., 2013}).

Phytosanitary visual characteristics of the variety INIFLAR RT: with regard to plant behavior INIFLAR RT, resistant to burning or rice blast, caused by Magnaporthe grisea (Hebert) comb. Nov. Barr. and the linear spot Cercospora oryzae (Miyake), and records moderate resistance to coffee stains (Helminthosporium oryzae) and complex grain discoloration (Table 3).

Table 3 Reaction to diseases of the variety INIFLAR RT measured visually in the years 2013 and 2014, in different localities evaluation.