Cotton variety 13R352B2R2

#1. Field of the Invention

#The present invention relates generally to the field of cotton breeding. In particular, the invention relates to the novel cotton variety 13R352B2R2.

#2. Description of Related Art

#The invention provides, in one aspect, methods and composition relating to plants, seeds and derivatives of the cotton variety 13R352B2R2. The cotton variety 13R352B2R2 has been judged to be uniform for breeding purposes and testing. The variety can be reproduced by planting and growing seeds of the variety under self-pollinating or sib-pollinating conditions, as is known to those of skill in the agricultural arts. Variety 13R352B2R2 shows no variants other than what would normally be expected due to environment or that would occur for almost any characteristic during the course of repeated sexual reproduction. The results of an objective description of the variety are presented below, in Table 1. Those of skill in the art will recognize that these are typical values that may vary due to environment and that other values that are substantially equivalent are within the scope of the invention.

#Monsanto has developed 13R352B2R2 insect-protected and herbicide-tolerant cotton through conventional breeding. The donor parent was 07W783B2R2, Bollgard II® and Roundup Ready® Flex cotton (containing the gene events MON 15985 and MON 88913). MON 15985 produces the Cry1Ac and Cry2Ab proteins, which give protection from feeding damage caused by lepidopteran insect pests. Cry1Ac and Cry2Ab came from the bacterium Bacillus thuringiensis (subsp. kurstaki). MON 88913 produces a 5-enolpyruvylshikimate-3-phosphate synthase protein from Agrobacterium sp. strain CP4 (CP4 EPSPS), which confers tolerance to glyphosate, the active ingredient in the Roundup® family of agricultural herbicides.

#13R352B2R2 was developed through marker-assisted backcross breeding using elite line 09Y237 as the recurrent parent (RP). The F1, BC1, and BC2 crosses were made in Costa Rica starting in 2008. The BC2F1 population was grown at La Palma, Costa Rica in 2009, where BC2F1 plants were selected for selfing based on marker-assisted RP recovery and presence of MON 15985 and MON 88913. In 2010, BC2F2 plants were grown near Bagaces, Costa Rica and again selected for marker-assisted RP recovery and homozygosity for the two gene events. Five BC2F2 plants with greatest recovery of the RP and also homozygous for the gene insertions were selfed and harvested individually. The resulting BC2F3 progeny rows were planted in 2010 for increase at Chomes, Costa Rica.