Multicellular living organisms and unmodified parts thereof and – Plant – seedling – plant seed – or plant part – per se – Higher plant – seedling – plant seed – or plant part
Reexamination Certificate
1997-01-08
2001-02-13
Benzion, Gary (Department: 1638)
Multicellular living organisms and unmodified parts thereof and
Plant, seedling, plant seed, or plant part, per se
Higher plant, seedling, plant seed, or plant part
C800S298000, C800S275000, C800S271000, C800S268000, C435S412000, C435S424000, C435S430000, C435S430100
Reexamination Certificate
active
06187999
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a new and distinctive corn inbred line designated NP 2017 and to hybrids made by using NP 2017 as a parent.
Corn (
Zea mays
) is a valuable and important field crop. Thus, plant breeders are continually developing new and superior corn inbred lines for production of high yielding, agronomically sound hybrids. The goal of the plant breeder is to combine in a single variety or hybrid an improved combination of desirable traits from the parent, inbred germplasm. These traits may include maximization of yield, resistance to disease and insects, tolerance to drought, heat and other environmental stresses. These traits are governed by a complex genetic system that makes selection and breeding of an inbred line challenging.
Corn hybrid development requires the development of homozygous inbred lines, the crossing of these lines, and the subsequent evaluation of those crosses. Pedigree, backcross, and recurrent selection breeding methods are used to develop inbred lines from breeding populations. Breeding programs combine the genetic backgrounds from two or more inbred lines or various other genetic sources into breeding pools from which new inbred lines are developed by self pollination and selection of desired phenotypes. The new inbred lines are crossed with other inbred lines, and hybrids from these crosses are evaluated to determine which have commercial potential.
Once the inbred parents that give a superior hybrid are identified, the hybrid seed can be reproduced indefinitely as long as inbred parent homogeneity is maintained. Corn hybrids may be either single cross hybrids, produced when two inbred lines are crossed to produce the first generation (F1) progeny; double cross hybrids, produced from four inbred lines crossed in pairs (A×B and C×D) and then the two F1 hybrids are crossed again (A×B)×(C×D); or three-way cross hybrids produced from crossing a single cross (A×B) to a third inbred line C. Numerous references are available on the topic of corn breeding and hybrid seed corn production. Those skilled in the art of corn breeding and production are well aware of techniques and methods for the development of inbred corn lines and corn hybrids. However, while many of the techniques and methods are known, breeder care and expertise must be used in the selection of breeding material for resulting yield increase and superior agronomic traits. Reference is made particularly to Corn and Corn Improvement, Third Edition, ed. G. F. Sprague and J. W. Dudley, American Society of Agronomy Monograph No. 18, particularly chapters 8 and 9, the substantive content of which is hereby incorporated by reference.
SUMMARY OF THE INVENTION
According to the invention, there is provided a novel inbred corn line, designated NP 2017. This invention thus relates to the seeds of inbred corn line NP 2017, to the plants of inbred corn line NP 2017 and to methods of producing a corn plant comprising the crossing of inbred line NP 2017 with itself or another corn line.
This invention further relates to hybrid corn seed produced by crossing the inbred line NP 2017 with another corn inbred line. More specifically the invention extends to hybrid corn seed produced by planting in pollinating proximity seeds of inbred corn line NP 2017 and a second inbred line having a genotype different from NP 2017; cultivating corn plants resulting from said planting until time of flowering; emasculating the flowers of plants of one of the inbred lines; allowing cross pollination to occur between the inbred lines; and harvesting seeds produced on the plants of the inbred line. The hybrid plants grown from the seed produced as stated above.
DEFINITIONS
In the description and examples that follow a number of terms are used; therefore, to provide a clear and consistent understanding of the specification and claims the following definitions are provided.
RK=Round Kernels: the percentage of kernels that do not pass through a {fraction (13/64)} slotted screen.
HE=Husk Extension: the length (cm) of the husk past the ear tip at maturity.
NN=Node Number: the number of nodes of the entire plant.
PRM=Predicted Relative Maturity. This trait is based on the harvest moisture of the grain. The relative maturity rating is based on a known set of checks, and is referred to as the Minnesota Relative Rating System.
MST=Harvest Moisture. The moisture is the actual percentage moisture of the grain at harvest.
STK (BR)=The percentage of plants broken below the ear at harvest.
YLD=Yield; bushels per acre. The actual yield of the grain at harvest (bu/a) adjusted to approximately 15.5% moisture.
RT=Number of plants lodged (leaning from vertical but not broken).
Plt. Ht.=Plant Height; The length of the plant to tassel tip (cm).
HU=Heat Units;
Max
Temp
(
≤
86
°
F
.
)
+
Min
Temp
(
≥
50
°
F
.
)
2
-
50
HUS=Heat units from emergence to 50% of plants in silk.
HU to pollen=Heat units from emergence to 50% of plants in pollen.
HU to pollen shed=Heat units from 10% to 90% pollen shed.
Ear Ht.=Ear Height. The measurement from the ground to the top developed ear node attachment measured in cm.
Benzion Gary
Lebel Edouard G.
Novartis AG
Vrana Bruce
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